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Section 3

 


Air Brake Tests

 

Table of Contents

 

1.0.... General Instructions. 20

1.1        Inspection of Brake Equipment on Locomotives and Cars. 20

1.2        Cars with Inoperative Brakes. 20

1.3        Standard Brake Pipe Pressures. 20

1.4        Unintended Emergency Brake Application During Air Brake Test (Kicker or Dynamiter) 20

2.0 ... Roles and Responsibilities. 20

2.1        Employee(s) Performing Inspection. 20

2.2        Person in Charge. 20

2.3        Engineer Responsibilities During Test 21

3.0.... Locomotive Air Brake Test 21

3.1        When Required. 21

3.2        Procedure for Locomotive Air Brake Test 21

3.3        Locomotives with Inoperative Brakes. 22

4.0.... RSC (Reset Safety Control) (Alerter) 22

4.1        RSC Requirements. 22

4.2        RSC Test Procedures. 22

4.3        RSC Malfunction. 22

5.0.... Charging Air Brake System.. 23

5.1        Charging Uncharged Air Brake System.. 23

5.2        Charging Times - Uncharged Brake Systems. 23

5.3        Reducing Charging Time. 23

5.4        Inspecting for Leakage or Obstructions. 23

6.0.... Use of TIBS (SBU) 24

6.1        Application and Release of Rear Car 24

6.2        Qualification of TIBS (SBU and Head End Display) 24

7.0.... Brake Pipe Leakage Test 24

7.1        When Required. 24

7.2        Inspection of Train Before or During Air Brake Test 24

7.3        Air Flow Method (AFM) Leakage Test 24

7.4        Increase in Brake Pipe Air Flow. 24

7.5        Brake Pipe Leakage Test (Non-AFM) 25

8.0        Class I Air Brake Test (Initial Terminal Air Brake Test) 25

8.1        When to Perform a Class I Air Brake Test 25

8.2        Class I Air Brake Test Procedures. 26

8.3        Class I Air Brake Test Performed with Yard Test Plant 26

8.4        Engineer Notification. 26

9.0.... Class IA, Air Brake Test (1,000 Mile Air Brake Test) 29

9.1        Class IA Air Brake Test Procedure. 29

9.2        Class IA Air Brake Test with Power Unattended or Removed from Train. 29

10.0.. Class II (Intermediate Air Brake Test) 29

10.1      Class II Air Brake Test - Adding Cars Not Pre-Tested. 29

10.2      Class II Air Brake Test Procedure. 29

11.0.. Class III Air Brake Test (Application and Release, and Continuity) 30

11.1      Class III Air Brake Test 30

11.2      Class III Air Brake Test Procedure. 30

12.0.. Transfer Air Brake Test 30

12.1      Transfer and Yard Movements. 30

12.2      Procedure for Conducting a Transfer Air Brake Test 30

13.0.. Running Air Brake Tests. 30

13.1      Passenger Trains. 30

13.2      Freight Trains. 30

13.3      Light Engines. 30

13.4      Procedure for Running Air Brake Test 35

14.0.. Extended Haul Trains. 35

14.1      General Requirements. 35

15.0.. Inbound Train Inspection. 35

15.1      General Requirements. 35

15.2      Brake Inspection and Test Required. 35

16.0.. Detached Locomotives or Cars. 35

16.1      Requirements. 35

16.2      Detaching Yard Air 35

17.0.. Emergency Application Capability from Rear of Train. 35

17.1      Terms. 35

17.2      Requirements. 35

17.3      Methods of Providing Emergency Application Capability at Rear of Train. 35

17.4      SBU Calibration Date and Accuracy. 35

17.5      Testing Emergency Function. 35

17.6      Manual Test of TIBS (COMM TEST) 35

17.7      Conditions Indicating En Route Failures. 35

17.8      En Route TIBS Failure. 35

17.9      Excessive Speed on Descending Grade. 35

17.10    Disarming TIBS Head End Display Unit 36

18.0 Reference. 36

18.1      Standard Locomotive Air Pressures. 36

18.2      Independent Brake Cylinder Pressure. 36

18.3      Piston Travel Limits of Body Mounted Air Brake Cylinders. 37

18.4      Piston Travel Limits of Truck Mounted Air Brake Cylinders. 39


 


1.0    General Instructions

1.1    Inspection of Brake Equipment on Locomotives and Cars

Inspect and test brake equipment on locomotives and cars according to:

·         Federal Railroad Administration (FRA) regulations.

In addition the mechanical integrity of all cars at the initial terminal and cars added en route must be inspected as per:

·         Rule 70, NORAC Operating Rules, and

·         Section 4, CPR Air Brake Train Handling Rules.

When performing a car inspection:

·         Inspect cars on both sides.

·         Examine and observe all moving parts of the brake system on each car.

1.2    Cars with Inoperative Brakes       

Air brakes on all cars must be operative except:

·         Cars being moved for repairs following a Class IA or Class II brake test that are properly carded by a qualified mechanical inspector, or

·         Cars with brakes that fail en route that are documented on the Crew to Crew Information Form (See Section 9, Rule 2.9)

Note:  At least 85 percent of the cars in a train must have operative brakes under all circumstances.

1.3    Standard Brake Pipe Pressures

Freight service—90psi

Yard service—75 psi

Passenger equipment or trains consisting entirely of CPR business car(s)—90 psi.

 


1.4    Unintended Emergency Brake Application During Air Brake Test
(Kicker or Dynamiter)

If a train goes into emergency during a Class I, Class IA, Class II, or Transfer air brake test, the test is unsuccessful.

·         Recharge the train air brake system.

·         Repeat the test.

 

2.0    Roles and Responsibilities

2.1    Employee(s) Performing Inspection

A Qualified Person or a Qualified Mechanical Inspector must perform inspections and air brake tests.

·         Qualified Person (QP) - a trainman given fundamental training on freight car inspections and air brake tests. All CPR trainmen are Qualified Persons in the application of these rules.

·         Qualified Mechanical Inspector (QMI) -
a person, such as a carman, with more extensive training in air brake testing and maintenance that provides for a more detailed inspection.

Note: Trains given an inspection by a QMI may travel up to 1500 miles before additional inspections are required (See Rule 14.0 in this section, Extended Haul Trains.)

2.2    Person in Charge

While the test is being conducted, the person performing the air brake test is considered the person in charge of the train at that time.

The person in charge must determine that all employees are safely positioned before giving authority to:

·         Apply or release the brakes, or

·         Move the train.


2.3    Engineer Responsibilities During Test

Engineers must allow their trains to be inspected where required.

Unless authorized by the person in charge, an engineer must not:

·         Apply or release train brakes.

·         Move the train until the air test is complete.

 

3.0    Locomotive Air Brake Test

3.1    When Required

Conduct a locomotive air brake test when:

·         Locomotive consist is coupled together;

·         Adding or removing locomotives;

·         Changing operating ends;

·         When first taking charge of a locomotive on a tie-up track.

Exception:  Locomotive air brake test will not be necessary if notified the test has been performed.

3.2    Procedure for Locomotive Air Brake Test

Position a qualified person on the ground to signal when to apply and release locomotive brakes and to observe that all brake pistons extend and retract as intended on the locomotives being tested.  Then complete the following steps:

Step

Action

1

Ensure that the locomotive is protected from unintended movement.

2

Place the automatic brake handle in the release position for at least 2 minutes to ensure the locomotive air brake system is sufficiently charged.

3

Fully apply and release the independent brakes.

4

Make a 15 psi brake pipe reduction.  After brakes have applied, release the locomotive brakes by depressing the independent brake handle (bail) for at least 4 seconds for each locomotive in the consist.


Procedure for Locomotive Air Brake Test – continued

Step

Action

5

Make a further 10 psi brake pipe reduction, observe the brakes apply, then release the automatic brake.

6

Test the operation and recovery of the Safety Control System, except when adding a trailing locomotive(s).

7

Test RSC.  See Rule 4.0 of this Section.

3.3    Locomotives with Inoperative Brakes

100 percent of locomotive brakes must be operative when leaving the initial terminal.

·         If locomotive brakes become inoperative after leaving the initial terminal:

Ψ    Cut-out the brakes on that locomotive,

Ψ    Attach a non-complying tag, and

Ψ    Document on the Crew to Crew Information Form.

·         Locomotives with inoperative brakes may not travel further than the next location capable of making repairs or the next daily inspection.  Locomotive must be tagged with a Non-Complying Tag, Form 2067.

 

4.0    RSC (Reset Safety Control) (Alerter)

4.1    RSC Requirements

RSC (Reset Safety Control), commonly known as an Alerter, is device that will initiate a penalty brake application when the Reset Safety Control (RSC) times out.  Timing out of the RSC occurs when one of the reset devices is not used by the engineer.  Example of a reset occurs when the engineer operates the horn, moves the throttle or dynamic brake handle, actuate the engine brakes or pressing the reset button.

A controlling locomotives equipped with an RSC (Alerter) must be operative.  A locomotive found with an inoperative RSC may be used until the next Locomotive Daily Inspection or the next forward point where repairs can be made.

 

4.2    RSC Test Procedures

The RSC must be tested when conducting a locomotive air brake test.

Test Procedure

Step

Action

1

Protect locomotive from unintended movement.

2

Ensure the safety control valve or switch is cut-in and sealed.

3

Initiate a penalty brake application by placing the automatic and independent brake handles in the released position.

4

Make sure the audible alarm and warning lights (RSC) or warning whistle (safety control foot pedal) are functioning.

5

Make certain the PC, PCS, or Power Off indicator light illuminates.

6

Make sure equalizing reservoir pressure reduces to zero.

7

Recover penalty brake application.

4.3    RSC Malfunction

If the RSC malfunctions en route, example non-recoverable penalty brake application, then the RSC may have to be cut-out.

Cut-Out Procedure

Step

Action

1

Immediately notify the Dispatcher or Central Locomotive Specialist and obtain permission to cut-out RSC.  Record the situation and defect on the Crew to Crew Information Form.

2

Cut-out the Safety Control cock or switch.

3

Proceed with the locomotive until the:

·                     Next Locomotive Daily Inspection, or;

·                     The next forward point where repairs can be made which ever occurs first, or

·                     Place the locomotive in a trailing position in the consist.


 

5.0    Charging Air Brake System

5.1    Charging Uncharged Air Brake System

Charge an empty air brake system for the appropriate amount of pressure or time to ensure that the system functions as required. When charging the system, the following will apply:

a)       Do not charge the train brake system with more than one automatic brake valve in a locomotive consist cut-in.

b)       Maintain constant diesel engine RPM unless main reservoir pressure drops below 105 psi. If engine RPM must be increased, do not exceed throttle position 4.

Note:  On GE AC4400 locomotives, advance throttle to No. 1 position.

On SD90MAC locomotives, leave the throttle in IDLE. The diesel engine will speed up automatically if main reservoir pressure drops below 105 psi.

c)       In yards where trains are made up, unattended locomotives may be used to charge the air brake system when ambient temperature requires additional charging time if:

·      Hand brakes are applied to hold the cars to be charged as required by Section 7, Securing Equipment, and

·      All hand brakes are applied on the locomotive consist.

 

5.2    Charging Times - Uncharged Brake Systems

Use following table as a guide to determine the minimum and maximum charging times:

Charging Times when
Brake System is Empty

Brake Pipe Length

(In feet)

Minimum Charging Time

(In minutes)

Maximum Charging Time

(In minutes)

2,500 or less

8

25

3,000

10

30

4,000

15

35

5,000

20

40

6,000

25

55

7,000

35

65

8,000

45

75

9,000

60

100

10,000

70

125

11,000

80

160

5.3    Reducing Charging Time

Temperature, train length, leakage, and cars partially charged all affect the time required to charge cars in the train. To reduce charging time:

a) Prior to coupling brake pipe hoses between equipment:

·         Blow hoses free of foreign matter (dirt and snow),

·         Shake hoses to remove dirt or snow (uncharged system).

b)       Repair any brake system leakage.

5.4    Inspecting for Leakage or Obstructions

Immediately inspect for leakage or obstructions if one or more of the following occur during charging:

·         The rear car brake pipe pressure stops rising before it reaches the required pressure.

·         The air flow indicator holds steady above 60 CFM or above the calibration mark.

·         The maximum charging time is reached. (See Rule 5.2 in this section, Charging Times - Uncharged Brake System)


 

6.0    Use of TIBS (SBU)

6.1    Application and Release of Rear Car

a)       The SBU (Sense and Braking Unit) may be used to determine if the air brakes apply and release on the rear car when conducting the following air brake tests:

·      Class II air brake test - Adding cars not pre-tested, except if those cars are added to the rear of train.

·      Class III air brake test:

Ψ       Adding solid block of cars pre-tested.

Ψ       Cut-off and re-coupled same locomotive and train.

Ψ       Cut-off cars, change locomotive and/or caboose.

Ψ       Continuity Test.

Note:  The SBU cannot be used in a Class I Air Brake Test (Initial Terminal Air Brake Test), Class IA Air Brake Test (1000 Mile) or a Class II test where the cars are added to the rear of train. In these cases, the rear car must be visually inspected to determine if brakes apply and release.

b)       Use the head-end display to determine if the brakes apply and release on the rear car by verifying that:

·         Rear brake pipe pressure decreases at least 5 psi.

·         Rear brake pipe pressure increases at least 5 psi.

6.2    Qualification of TIBS (SBU and Head End Display)

If the difference between the brake pipe pressure readings on the SBU and the head-end display unit exceeds 3 psi, then do not use the SBU to determine if the rear car applies and releases.

 

 

7.0    Brake Pipe Leakage Test

7.1    When Required

Test brake pipe leakage when conducting;

·         Class I, (Initial terminal air brake test) or;

·         Class IA, (1000 mile air brake test), or;

·         Class II, when adding cars not pre-tested (intermediate brake test).

7.2    Inspection of Train Before or During Air Brake Test

While charging the air brake system or after brakes have been applied, inspect and verify the following:

Inspect

Verify

Angle cocks

Properly positioned

Retaining valves

In EXHAUST position

Air hoses

·   In condition for service

·   Properly coupled

·   No indication of kinks or restrictions in air flow

System for leakage

·    No leakage,

·    Make repairs to reduce leakage, or

·    Set defective car(s) out of train (Class I & II brake tests)

 

7.3    Air Flow Method (AFM) Leakage Test

The Air Flow Method is the preferred leakage test method.

Use this method if the train has an operational SBU, and the controlling locomotive has:

a)       An operational self-lapping, maintaining-type automatic brake valve,

b)       A working airflow indicator with:

·         A direct reading air flow indicator in increments no greater than 10 cubic feet per minute (cfm) or,

·         An airflow indicator with orange or red calibration mark that is 60 cfm,

c)       An operational head end display unit.

Conduct an AFM test as follows:

Step

Action

1

Charge the brake system to within
15 psi of the regulating valve setting, but not less than 75 psi.

2

Ensure that:

·      Air flow does not exceed 60 cfm, or

·      Air flow pointer is at or below the calibration mark.

3

When a signal is received to apply the brakes, make a 20 psi brake pipe reduction with the automatic brake valve.

4

Make the applicable brake test inspection.

5

When a signal is received to release the brakes, move the automatic brake valve handle to RELEASE.

7.4    Increase in Brake Pipe Air Flow

If a train qualified by Air Flow Method experiences a brake pipe air flow of greater than 60 CFM or brake pipe gradient of greater than
15 psi while en route and the movable pointer does not return to those limits within a reasonable time, the train shall be stopped at the next available location and be inspected for leaks in the brake system.


7.5    Brake Pipe Leakage Test (Non-AFM)

The Non-AFM Brake Pipe Leakage Test measures the amount of leakage in a closed air brake system.

Note: Use this test only if the AFM Leakage Test cannot be used.

To conduct a brake pipe leakage test:

Step

Action

1

Charge the brake system to within 15 psi of the regulating valve setting, but not less than 75 psi.

2

Wait for the signal to apply the brakes.

3

When a signal is received to apply train brakes, make a 20 psi brake pipe reduction with the automatic brake valve.

4

Allow the brake pipe exhaust to stop.

5

Wait 60 seconds.

6

Cut out the automatic brake valve.

7

Wait 60 seconds again.

8

Time the brake pipe leakage for 60 seconds insuring that:

·      Leakage does not exceed 5 psi during the 60-second test, and

·      Independent brake valve is not actuated during the leakage test.

9

Make the applicable brake test inspection.

10

When a signal is given to release the brakes:

·      Move the automatic brake valve to RELEASE position, and

·                     Cut-in the automatic brake valve.

 


8.0    Class I Air Brake Test (Initial Terminal Air Brake Test)

A Class I Air Brake Test is performed by a:

·         Qualified Person, or

·         Qualified Mechanical Inspector.

8.1    When to Perform a Class I Air Brake Test

Conduct Class I air brake test on the entire train:

a)       Where the train is originally made up (initial terminal).

b)       When the train or a block of cars is not kept charged (has not been connected to a source of air within the last 4 hrs.)

·         If a portion of a train has not been kept charged, then conduct the Class I air brake test on that portion of the train.

c)       When a train is received in interchange and the train consist is changed, except when:

·         Changing locomotive power.

·         Removing or changing the caboose.

·         Removing a single car or solid block of cars.

·         Adding a previously tested car or a previously tested solid block of cars to the train.

·         Any combinations of these changes.

d)       When the train consist is changed, except when the change is one or more of the following:

·         Removing a single car or solid block of cars.

·         Removing defective cars.

·         Adding a single car or block of cars previously tested by Class I air brake test that have remained continuously coupled together with the train line connected and have not been off air for more than 4 hours.

Note:  If a single car or block of cars has not been pre-tested by Class I air brake test, then conduct a Class I air brake test on those added car(s).


8.2    Class I Air Brake Test Procedures

To perform a Class I air brake test, complete the following steps:

Step

Action

1

Inspect the train in accordance with Rule 7.2 (Inspection of Train Before or During Brake Test).

2

Test brake pipe leakage following the procedure outlined in Rule 7.3, AFM Leakage Test; or Rule 7.5, Brake Pipe Leakage Test (Non-AFM).

3

Verify:

·        Brakes apply on each car.

Note:  If brakes do not apply, or do not remain applied until a release is initiated, then retest brake application. Brakes must remain applied for a minimum of three minutes and until a release is initiated. If test is still unsuccessful then set out defective car(s). Brakes must be operative on 100 percent of cars.

·        Brake rigging is properly secured, and does not bind or foul.

·        Piston travel is within applicable limits. (See Rules 18.3 and 18.4 in this section).

Note:  Bottom rod safety supports are not required on cars with bottom rods that pass through truck bolster or have cotter keys equipped with a locking device that prevent their accidental removal.

·                Inspect each side of each car sometime during the inspection so as to be able to examine and observe the functioning of all moving parts of the brake system.

 

 

Class I Procedures - continued

Step

Action

4

After the release, inspect each brake to make sure all are released. The release may be verified during a roll-by inspection, not exceeding 10 MPH.

Note:  The rear car must be visually inspected to determine brakes apply and release.

8.3    Class I Air Brake Test Performed with Yard Test Plant

When a yard test plant has been used to pre-test a train or block of cars and a locomotive has been added:

Step

Action

1

Make a 20 psi brake pipe reduction.

2

Test brake pipe leakage following the procedure outlined in Rule 7.3, AFM Leakage Test; or Rule 7.5, Brake Pipe Leakage Test (Non-AFM).

Note:  Leakage test is not required if yard test plant is set for 80 psi or more.

3

Verify that brakes apply and release on the rear car (Use of SBU is permitted.) and brake pipe is being restored.

8.4    Engineer Notification

A qualified person or qualified mechanical inspector who participated in the Class I test and inspection, or knows it was completed, must notify the engineer in writing or verbally.  Conductors or supervisors may relay this information.

a)       Notification includes:

·         Test successfully completed

·         Date

·         Time

·         Location, and

·         Number of cars inspected.


b)       Written notification can be by any one of the following methods:

·         On Form Q-8065, Crew to Crew Information Form or facsimile. See Section 9, Crew to Crew Information Form.

·         Computer print out Form TBS

c)       Verbal communications must be recorded by the conductor or engineer on Form Q-8065, Crew to Crew Information Form or facsimile.

Engineers receiving written notification of the air brake test must:

·         Accept the notification as authority that the Class I air brake test has been completed successfully.

·         Maintain written notification of the inspection and test in the cab of the locomotive in the form holder provided until train reaches final destination.

 

9.0    Class IA, Air Brake Test
(
1,000 Mile Air Brake Test)

A Class IA Air Brake Test:

·      Is performed by a:

Ψ       Qualified Person, or

Ψ       Qualified Mechanical Inspector.

·      Is performed on through freight trains at designated locations (but not to exceed
1,000 miles except on designated extended haul trains)

9.1    Class IA Air Brake Test Procedure

To perform a Class IA air brake test, complete the following steps:

Step

Action

1

Inspect the train in accordance with Rule 7.2 (Inspection of Train Before or During Brake Test).

2

Test brake pipe leakage following the procedure outlined in Rule 7.3, AFM Leakage Test; or Rule 7.5, Brake Pipe Leakage Test (Non-AFM).

 

Class IA Brake Test Procedure - continued

Step

Action

3

Verify:

·        Brakes apply on each car.

Note: If brakes do not apply, or do not remain applied until a release is initiated, then retest brake application. Brakes must remain applied for a minimum of three minutes and until a release is initiated. If test is still unsuccessful then set out defective car(s). Brakes must be operative on 100 percent of cars.

Exception: Cars may be moved only to the next location where repairs can be made providing they comply with requirements of Rule 1.2 of this section.

·        Brake rigging is properly secured, and does not bind or foul.

·        Piston travel is within applicable limits. (See Rules 18.3 and 18.4 in this section).

4

After the release, inspect each brake to make sure all are released. The release may be verified during a roll-by inspection, not exceeding 10 MPH.

 

Note:  The rear car must be visually inspected to determine brakes apply and release.

 

9.2    Class IA Air Brake Test with Power Unattended or Removed from Train

If train will be left unattended:

Step

Action

1

Secure train with hand brakes as required by Section 7, Securing Equipment.

2

Make a 20 psi brake pipe reduction.

3

Make a further brake pipe reduction to
40 psi.

If the locomotive will be detached or a cut made, complete the following steps:

Step

Action

1

Secure equipment against undesired movement as required.
(See Section 7)

2

Place the automatic brake valve handle in HANDLE OFF POSITION until the exhaust stops and the brake pipe is reduced to zero psi.

3

Signal that the brake valve exhaust has stopped by sounding whistle signal NORAC 19 (f), or using the radio.

4

Close the angle cock at the rear of the last locomotive or car to be detached.

5

Detach the locomotive or locomotive and cars and move at least 50 feet from the cars left standing.

Note

Do not bottle air or maintain air pressure in the brake pipe when locomotives are detached.

The angle cock on the standing portion can only be closed when:

·                     The angle cock is FULLY OPEN on opposite end of the equipment, OR

·                     An occupied locomotive is coupled on opposite end of the equipment.

·                     The equipment has been secured with hand brakes in accordance with the hand brake rules.

 

 

10.0 Class II (Intermediate Air Brake Test)

10.1 Class II Air Brake Test - Adding Cars Not Pre-Tested

Perform a Class II brake test when the following are added to the train:

·         A single car or solid block of cars that has not received a Class I or Class II air brake test or that has not been connected to a source of air for more than four hours;

·         Each solid block of cars comprised of cars from more than one previous train;

·         A solid block of cars from one previous train, if the cars have been separated into multiple solid blocks of cars (due to space or trackage constraints) and are not added in the same relative order as when removed.

·         Each solid block of cars comprised of cars from only one previous train, that have not remained continuously and consecutively coupled together with the train line remaining connected since being removed from the previous train.

Note:  If a solid block of cars has been changed only to remove defective equipment, then it is considered to have remained continuously and consecutively coupled together with the train line remaining connected since being removed from the previous train.

10.2 Class II Air Brake Test Procedure

To perform a Class II air brake test, complete the following steps

 

Step

Action

1

Inspect the train in accordance with Rule 7.2 (Inspection of Train Before or During Brake Test).

2

Test brake pipe leakage following the procedure outlined in Rule 7.3, AFM Leakage Test; or Rule 7.5, Brake Pipe Leakage Test (Non-AFM).

 

 

Class II Air Brake Test Procedure - continued

Step

Action



3

On the rear car and on all cars being added, verify that:

·                     Brakes apply.

Note: If brakes do not apply, or do not remain applied until a release is initiated, then retest brake application. Brakes must remain applied for a minimum of three minutes and until a release is initiated. If test is still unsuccessful then set out defective car(s). Brakes must be operative on 100 percent of cars.

Exception: Cars may be moved only to the next location where repairs can be made providing they comply with requirements (See Rule 1.2 of this section.)

·                     Brake rigging is properly secured, and does not bind or foul.

·                     Piston travel is within applicable limits. (See Rules 18.3 and 18.4 in this section).

4

After the release, verify that:

·        Brake pipe pressure is being restored at the rear of the train.

·        Brakes release on the rear car and on all the cars being added. The release may be verified during a roll-by inspection, not exceeding 10 MPH.

 

Note:  SBU may be used to verify set and release of rear end car if car(s) being added are not on rear end.

5

The results of the inspection must be communicated to the engineer.

 


 

11.0 Class III Air Brake Test (Application and Release, and Continuity)

11.1 Class III Air Brake Test

Perform a Class III air brake test when:

a)       Changing any locomotive or locomotive consist;

b)       Removing or changing a caboose;

c)       Removing a car or block of cars from the train with the consist otherwise remaining intact;

d)       Adding a car or block of cars pre-tested by a Class I Air Brake Test;

e)       Adding a car or block of cars from one previous train that previously received a Class I Air Brake Test and has been connected to a source of air within the last 4 hours;

f)         Coupling back to train after uncoupling for less than four hours (e.g., to make a cut at a road crossing);

g)       Adding helper locomotives anywhere in the train or removing helper locomotives from other than the rear end of the train;

h)       Adding locomotives after train has received air brake test from a yard air source.

i)         Brake pipe continuity is broken or interrupted;

j)         Train does not leave a terminal immediately upon completion of the brake test;

k)       Train stops where there is public access to the train, or public crossings are blocked;

l)         Any time brake pipe continuity is suspect.

 

11.2 Class III Air Brake Test Procedure

To perform a Class III air brake test, complete the following steps:

Step

Action

1

Verify that the brake system is charged and the pressure at the rear of the train is not less than 60 psi as indicated by an accurate gauge or TIBS (SBU).

2

Make a 20 psi brake pipe reduction with the automatic brake valve.

3

Verify that brakes on the rear car apply (SBU may be used for verification).

4

Move automatic brake valve to RELEASE position.

5

Verify that brakes on the rear car release (SBU may be used for verification).

6

Verify the brake pipe pressure at the rear of the train is being restored.

 

12.0 Transfer Air Brake Test

12.1 Transfer and Yard Movements

Transfer test may be used on a train making a transfer and yard movement providing it does not exceed 20 miles in one direction.

12.2 Procedure for Conducting a Transfer Air Brake Test

To perform a Transfer Air Brake Test:

Step

Action

1

Verify that the brake system is charged and the pressure at the rear of the train is not less than 60 psi as indicated by an accurate gauge or TIBS (SBU).

2

Make a 20 psi brake pipe reduction.

3

Verify that the brakes apply on each car.

 


 

13.0 Running Air Brake Tests

13.1 Passenger Trains

Perform a Running Air Brake Test on passenger trains and trains consisting entirely of business cars when:

·         The train leaves the initial terminal.

·         Locomotive, engine crew, train crew, or operating ends have been changed.

·         Any angle cocks or cutout cocks have been opened or closed.

·         An initial terminal air brake test has been conducted.

·         The train reaches points designated by the timetable or general order.

·         The train has struck debris on the track.

13.2 Freight Trains

Perform a Running Air Brake Test on freight trains when moving where required by timetable instructions.

13.3 Light Engines

See Section 5, Rule 6.0, Moving Locomotives.


13.4 Procedure for Running Air Brake Test

To perform a running air brake test:

Step

Action

1

Begin the test as soon as train speed is high enough to prevent stalling and use enough power to keep the train stretched.

2

Apply the train brakes with enough force to verify they are operating properly.

3

Verify that the train brakes create a noticeable retarding force.

Do not apply the locomotive or dynamic brakes during a running test.

4

If the train brakes operate properly, release the brakes and proceed.

If the train brakes do not operate properly:

1.                   Stop the train immediately.

2.                   Inspect the brakes to identify and correct the problem.

3.                   Perform a Class III air brake test before proceeding (Rule 11.2 of this section).

4.                   Immediately repeat the running air brake test once the train is proceeding.

 

14.0 Extended Haul Trains

Trains designated as “Extended Haul” may be operated greater than 1000 miles but not to exceed 1500 miles before an additional Class I or IA Air Brake Test is conducted.

 

14.1 General Requirements

The requirements for Extended Haul Trains are:

a)       A Qualified Mechanical Inspector (QMI) must perform the air brake test and inspection.

b)       A complete mechanical safety inspection of the train must be performed by a QMI.

c)       The train may not depart origin with any mechanical defects or inoperative brakes.

d)       The train may not make more than one pick up or set out between Class I and Class IA inspection points. This excludes any set out of defective equipment discovered en route.

e)       Any cars set out en route must be given an inbound inspection by a QMI.

f)         Any car or solid block of cars added en route must be inspected and pre-tested by a QMI.

g)       Train must be given inbound inspection and Class I air brake test by a QMI at destination.

 

15.0 Inbound Train Inspection

15.1 General Requirements

Though not required except for extended haul trains, any inbound train may be inspected for defects in the air brake system by an inspector as the train arrives at its final terminal.

When an inspector is present, incoming trains must not exceed 10 MPH.

 

15.2 Brake Inspection and Test Required

When notified a brake inspection and test are required, including Class IA and Extended Haul Air Brake Tests:

Step

Action

1

Secure train with hand brakes as required by Section 7, Securing Equipment.

2

If the locomotive will remain on the train, make a 20-psi brake pipe reduction.

If the locomotive will be detached or a cut made:

Step

Action

1

Secure equipment against undesired movement as required.
(See Section 7)

2

Place the automatic brake valve handle in HANDLE OFF POSITION until the exhaust stops and the brake pipe is reduced to zero psi.

3

Signal that the brake valve exhaust has stopped by sounding whistle signal NORAC 19 (f), or using the radio.

4

Close the angle cock at the rear of the last locomotive or car to be detached.

5

Detach the locomotive or locomotive and cars and move at least 50 feet from the cars left standing.

Note

Do not bottle air or maintain air pressure in the brake pipe when locomotives are detached.

The angle cock on the standing portion can only be closed when:

·                     The angle cock is FULLY OPEN on opposite end of the equipment, or

·                     An occupied locomotive is coupled on opposite end of the equipment.

·                     The equipment has been secured with hand brakes in accordance with the hand brake rules.

 

 

16.0 Detached Locomotives or Cars

16.1 Requirements

When detaching locomotives or locomotives and cars and no train brake inspection is required:

Step

Action

1

Secure equipment against undesired movement as required. (See Section 7.)

2

Make a 20-psi brake pipe reduction and wait for exhaust to cease.

3

Close angle cock on rear locomotive or last car to be detached from portion left standing. (Leave angle cock open on standing portion.)

4

Activate the Emergency Switch on the head-end display unit.

5

Detach the locomotive, or locomotive and cars, and move at least 50 feet from the cars left standing.

6

Allow brakes on any standing portion to apply in emergency.

Confirm with crew members that the standing portion has emergency brakes applied.

7

When available, observe head-end display unit to make sure that brake pipe pressure drops to 0 psi on the rear of the train.

Note

Do not bottle air or maintain air pressure in the brake pipe when locomotives are detached.

The angle cock on the standing portion can only be closed when:

·                     The angle cock is FULLY OPEN on opposite end of the equipment, OR

·                     An occupied locomotive is coupled on opposite end of the equipment.

·                     The equipment has been secured with hand brakes in accordance with the hand brake rules.

 

16.2 Detaching Yard Air

When detaching yard air, the standing portion of the train or cars must be left in EMERGENCY with angle cock FULLY OPEN (See Rule 16.1, above) and the equipment has been secured with hand brakes in accordance Section 7.  Confirm with crew members that the standing portion has emergency and hand brakes applied.

Note:  The FULLY OPEN angle cock may be subsequently closed only when:

·         The angle cock is FULLY OPEN on opposite end of the equipment, OR

·         An occupied locomotive is coupled on opposite end of the equipment.

·         The equipment has been secured with hand brakes in accordance with the hand brake rules.

 

17.0 Emergency Application Capability from Rear of Train

17.1 Terms

TIBS - two-way end of train device, consisting of an SBU mounted on the coupler of the last car and a head-end display unit mounted in the controlling locomotive.

17.2 Requirements

All trains over 4000 trailing tons must be operated with the ability to initiate an emergency application of the brakes from the rear of the train if they:

·      Operate at speeds greater than 30 mph, or

·      Operate on the following grades:

Territory

MP Location

Freight Main Line

MP 508 to MP 527

Freight Main Line

MP 592 to MP 604

Freight Main Line

MP 666 to MP 671

Freight Main Line

MP 682 to MP 686

 

Exceptions

Ability to initiate emergency application of the brakes from the rear of the train is not required by:

a)       Locals, road switchers and work trains operating over 30 MPH.

Note:  Locals, road switchers and work trains are defined as a train that can be operated by a single crew in a single tour of duty that do not exceed 4,000 trailing tons.

b)       Locomotive(s) without cars.

c)       Trains authorized by a company officer. When authorized by a company officer, trains over 4000 trailing tons must not enter territory listed in the table above until compliance with Rule 17.3.

17.3 Methods of Providing Emergency Application Capability at Rear of Train

One of the following methods of providing emergency application at the rear of the train must be available:

a)       An operable TIBS, armed and tested at point of installation.

b)       Remotely controlled locomotive(s) placed in the rear 1/3 of the train that are capable of initiating an emergency application.

c)       Trains with helper locomotive(s) in the rear 1/3 of the train, or passenger equipment or a caboose at the rear of train that are:

·      Equipped with an emergency brake valve, and

·      Manned by an employee equipped with two-way voice radio communication with the engineer at head end of train.

Note:  The engineer must communicate with the crew member before cresting grades listed in the table in Rule 17.2 of this section.

Ψ       If radio communications fails before train proceeds on such grades, the train must be stopped.

Ψ       If radio communication fails while moving on such grades, the train may proceed as long as it is under control.

 

 

17.4 SBU Calibration Date and Accuracy

Do not use an SBU with a calibration date more than 365 days old.

Brake pipe pressure readings displayed on the head-end display unit must be accurate to within 3 psi of brake pipe pressure displayed at the SBU.

17.5 Testing Emergency Function

At the installation point, test the functional capability of an SBU, caboose, helper locomotive, or passenger equipment emergency valve as follows:

Step

Action

1

Couple the brake pipe on the train to the SBU, caboose, helper-locomotive or passenger equipment.

2

Arm the SBU. (See Section 8.0.)

3

Close the angle cock on the lead end of the rear car of the train with the SBU, caboose, helper locomotive, or passenger equipment.

4

Initiate an emergency, by:

·        Activating the Emergency Switch on the head end display unit, or

·        Using the emergency valve on the caboose, helper locomotive, or passenger equipment.

Note

Ensure brake pipe pressure reduces to 0 psi on the head end display unit, caboose, helper locomotive, or passenger equipment.

5

Wait for the SBU emergency valve to automatically close. Some UP/CNW/NS SBUs require manual reset of emergency valve.

6

Open the angle cock on lead end of the rear car with SBU, caboose, helper locomotive, or passenger equipment and train.

 

Testing Emergency Function - continued

7

Notify engineer of the results of the test either verbally or in writing.

The test results must be recorded on the Crew to Crew Information Form and left in the controlling locomotive. Include date, time, location and the name of the person conducting the test and arming the TIBS.

8

Determine that brake pipe pressure is restored before proceeding.

17.6 Manual Test of TIBS (COMM TEST)

At crew change points, the outbound train crew must perform a pre-departure communication test to verify TIBS is operating properly.

To verify TIBS front to rear and rear to front radio links are operating properly:

·         Press the COMM TEST button on the head end display unit.

·         Make sure “COMM TEST” appears in the message display window.

17.7 Conditions Indicating En Route Failures

A failure is indicated when the head-end display unit indicates one of the following conditions:

a)       Emergency valve failure is indicated by:

·      The display of “VALV FAIL” or a “V” in the valve field, or

·      The IFD displays EOT VALVE.

b)       COMM TEST failure:

·      A successful COMM TEST cannot be performed in accordance with Rule 17.6 of this section.

c)       Loss of front to rear communication:

·      The display unit indicates a Front to Rear communication failure, or

·      The IFD displays “EOT COMM.”

d)       Not armed or SBU disabled:

·      The display unit indicates “NOT ARMED,” or

·      The head end display unit’s Emergency Status window displays:

Ψ       "Disabled,"

Ψ       "One Way," or

Ψ       " *** "  (Indicates out of range, unknown condition, or loss of communication).

e)       Manned helper, caboose, or passenger equipment:

·    A loss of voice radio communication between manned helper locomotive(s), caboose, or passenger equipment and the lead, controlling locomotive.

17.8 En Route TIBS Failure

Until en route TIBS failure is corrected or another method of compliance is secured, train must not:

·      Exceed 30 MPH

Note:  If failure occurs due to location (tunnel, rock cut, overpass, etc.), the train may be moved in an attempt to regain communications as long as the train is under control.

17.9 Excessive Speed on Descending Grade

If a train operating on a descending grade exceeds the maximum authorized speed by
5 MPH or more, then stop the train with an emergency application of the brakes by:

·         Placing the automatic brake handle into the emergency position,

·         Activating the Emergency Switch on the head end display unit (even if the head end display unit indicates no communication), and;


·Opening the emergency brake valve on the conductor’s side of the locomotive cab.

17.10  Disarming TIBS Head End Display Unit

Disarm the head end display unit when:

·         It is separated from the SBU at the train's final terminal, or

·         Either the SBU or the head end display unit is changed.

Disarming the head-end display unit disables the emergency command for all SBU ID numbers.

The following general instructions apply when disarming head-end unit from the SBU:

Step

Action

1

Set the display unit ID code to 80000 or utilize the "DISARMED" function from the menu if so equipped.

2

On locomotives with electronic display screens, follow prompts to disarm EOT (SBU).

3

Verify the display unit shows "NOT ARMED", "EOT EMERG STATUS DISABLED," or similar message.

 

 

18.0 Reference

18.1 Standard Locomotive Air Pressures

Unless otherwise specified locomotive pressure regulating devices must be adjusted to the following pressures:

Main Reservoir Pressure (psi)

Minimum

130 psi

Maximum

140 psi

 

 

18.2 Independent Brake Cylinder Pressure

DRF Class Locomotives

Locomotive  Number

Brake Cylinder Pressure

CP 5400 – 5414, 5560

72 psi

CP 5500 - 5559

63 psi

CP 5561 - 5564

63 psi

CP 5565 - 6080

72 psi

CP 8500 - 8653

72 psi

CP 9000 - 9024

72 psi

CP 9100 - 9160

72 psi

CP 9300 - 9303

72 psi

CP 9500 - 9683

72 psi

SOO SD60s

72 psi

SOO SD40s

72 psi

SOO GP40s with composition shoes

72 psi

SOO GP40s with cast iron shoes

40 psi

 

DRS Class Locomotives

Locomotive Number

Brake Cylinder Pressure

CP 3000 - 3135

27 psi

CP 5000 - 5025

27 psi

CP 8013 - 8046

27 psi

CP 8100 - 8113

72 psi

CP 8114 - 8130

72 psi

CP 8131 - 8171

72 psi

CP 8200 - 8202 - cast iron shoes

40 psi

CP 8203 – 8246

27 psi

CP 8248 & 8249

27 psi

SOO GP38s

40 psi

 

 

 

DS Class Locomotives

Locomotive Number

Brake Cylinder Pressure

CP 1200 – 1205

40 psi

CP 1206 – 1276

72 psi

CP 1500 – 1697

40 psi

CP 6700 - 6720 - cast iron shoes

40 psi

CP 6713 - 6714

30 psi

SOO MP15s

40 psi

Note:  The following abbreviations indicate locomotive type:

DRF

Diesel Road Freight

6 axle

DRS

Diesel Road Switcher

4 axle

DS

Diesel Switcher

4 axle

 

 

 


18.3 Piston Travel Limits of Body Mounted Air Brake Cylinders

Note: The cylinder diameter size is cast into the cylinder housing.

·         On 12-inch cylinders, the housing is 90 degrees to the piston rod.

·         On cylinders less than 10 inches, the housing is tapered.

 

Piston Travel Limits of Body-Mounted Air Brake Cylinders (Tapered)

Body-Mounted Brake Cylinder Diameter or Manufacturer

 

 

 

 

 

 

 

Maximum Piston Travel

Class I Air Brake Test Requirements

Cylinder size

Stan. 10” x 12”

 

10½”

 

to

8½” x 12”

10½”

to

7½ x 11”

9½”

to

x 12”

10½”

to

 

 

Piston Travel Limits of Body-Mounted Air Brake Cylinders

Body-Mounted Brake Cylinder Diameter or Manufacturer

 

 

Maximum Piston Travel

Class I Air Brake Test Requirements

Cylinder size

12” x 10” Standard

 

”

 

to

 


 

Piston Travel Limits of Body-Mounted Air Brake Cylinders

Body-Mounted Brake Cylinder Diameter or Manufacturer

 

 

Maximum Piston Travel

Class I Air Brake Test Requirements

Cylinder size

7 5/8” x 12” x  

 

”

 

to

 


18.4 Piston Travel Limits of Truck Mounted Air Brake Cylinders

 

Piston Travel Limits of Truck Mounted Air Brake Cylinders

Truck Mounted Brake Cylinder

Maximum Piston Travel

Class I Air Brake Test Requirements

WABCOPAC/NYCOPAC 

 

 

 

 

 

 

 

 

 

Ύ” to

WABCOPAC II  (Same as above with slack adjusters in each truck.)

 

 

 

 

 

 

 

 

 

 


3Ό”

1 Ύ” to

ELLCON NATIONAL  (One brake cylinder mounted to bracket on each truck bolster.)

 

 

 

 

 

 

 

 

 

 

4½”

 

2Ό” to 3Ό”

THRALL/DAVIS  (Each brake cylinder mounted directly to truck bolster with a cylinder push rod extending through.)

 

 

 

 

 

 

 

 

 

4½”

2Ό” to 4Ό”

MISNER/TTX  (Air bag designed actuator mounted to each truck bolster.  Load indication pointer inside truck on slack adjuster.)

 

 

 

 

 

 

 

 

 


10Ό”

7½” to 10”

Loaded

 

8½” to 10”

Empty

WABCO TMX  (One brake cylinder mounted to one brake beam within each truck.  New models have piston travel indicator on brake cylinder.)

 

 

 

 

 

 

 

 

 

 

 

3Ύ”

1½” to

 

 

Piston Travel Limits of Truck Mounted Air Brake Cylinders

Truck Mounted Brake Cylinder

Maximum Piston Travel

Class I Air Brake Test Requirements

TTOX/TTFX Air Actuator  (Single wheel truck air brake system.)

 

 

 

 

 

 

 

 

 


+/- Ό”

With the brakes applied, shoes must be against the wheels and the indicator pointed to the ON position.

 

Note:  TTOX Piston on/off indicator is located above the piston and shows if the piston is on or off.  In addition to the on-off indicator each car of this type (TTOX Front Runner)) has an inspection hole below the indicator.  This inspection hole is to be used to verify correct piston travel after repairs to the piston or associated parts have been performed.