Bendix Commercial Vehicle Systems AIR PRESSURE BALANCE PRESSURE TESTS User Manual
Air pressure balance & threshold pressure tests, Air pressure balance and threshold pressure tests

AIR PRESSURE BALANCE &
THRESHOLD PRESSURE TESTS
GENERAL INSTRUCTIONS:
1. Number the axle and each brake on the axle of the vehicle being tested using the illustration.
2. All testing should be performed using both increasing (INC) and decreasing (DEC) air pres-
sure and using our instructions.
3. When performing the Air Brake Pressure Balance Tests the pressure from only one chamber
of a tandem can be used when the same relay valve delivers pressure directly to all four
chambers on the tandem.
4. Record test results in the charts provided.
Air
Pressure
Balance
and
Threshold
Pressure
Tests
®
Date:
________________________
Test
Conducted
By:
____________
Vehicle
No:
___________________
Axle No. 1
2 __
__ __ __ __
__ __ __ __
__ __
Brake No. 1
3 __
__ __ __ __
__ __ __ __
__ __
Axle
Brake No. 2
4 __
__ __ __ __
__ __ __ __
__ __
Tractor
Dolly
Dolly
Trailer
Trailer
Trailer
Vehicle
Manufacturer
Number
Model, Year
Comments
Tractor
#1 Trailer
Conv. Dolly
#2 Trailer
Conv. Dolly
#3 Trailer
VEHICLE DATA
- TU-FLO 400 AIR COMPRESSOR (40 pages)
- TU-FLO 400 AIR COMPRESSOR (16 pages)
- TU-FLO 501 AIR COMPRESSOR 9/04 (36 pages)
- TU-FLO 700 COMPRESSOR 10/04 (36 pages)
- BX2150 AIR COMP (36 pages)
- D-2 GOVERNOR 5/10 (4 pages)
- BRAKE CHAMBERS (4 pages)
- E-6 DUAL BRAKE VALVES 6/10 (8 pages)
- E-6 DUAL BRAKE VALVES 6/10 (6 pages)
- E-7 DUAL BRAKE VALVE (8 pages)
- TC-2 TRAILER CONTROL BRAKE VALVE (4 pages)
- R-12 RELAY VALVES 3/4 (6 pages)
- R-6 RELAY VALVE (6 pages)
- RE-4 RELAY EMERGENCY VALVE (4 pages)
- SR-2 TRAILER SPRING BRAKE VALVE (6 pages)
- TP-2 TRACTOR PROTECTION VALVE 3/04 (4 pages)
- PP-3 TRAILER SUPPLY VALVE 3/04 (4 pages)
- TP-4 TRACTOR PROTECTION VALVE 6/07 (6 pages)
- LQ-2 QUICK RELEASE VALVES 3/04 (4 pages)
- PRESSURE PROTECTION VALVES (4 pages)
- QRV QR-1 QUICK RELEASE VALVES 7/06 (4 pages)
- MV-1 MODUTROL (6 pages)
- TW-N TWO WAY CONTROL VALVE (3 pages)
- R-7 MODULATING VALVE (6 pages)
- LP-2 LOW PRESSURE INDICATORS (4 pages)
- AD-4 AIR DRYER 10/04 (24 pages)
- MANUAL SLACK ADJUSTERS (6 pages)
- AH-4 AIR HYD INTENSIFIER 4/04 (6 pages)
- DV-2 AUTO RESERVOIR DRAIN VLV 10/11 (4 pages)
- BEPA (FORD) 15X4 CAM BRAKE 5/09 (8 pages)
- DOUBLE ANCHOR PIN CAM BRAKE 5/04 (12 pages)
- COMPACT 500 9/87 (27 pages)
- INLET REG VALVE COMP 3/04 (6 pages)
- BP-1 BRAKE PROPORTIONING VALVES (6 pages)
- TU-FLO 600 AIR COMPRESSOR 9/04 (36 pages)
- ROTOCHAMBERS (4 pages)
- DD-3 SAFETY ACTUATORS (6 pages)
- E-2 BRAKE VALVES 10/11 (4 pages)
- E-5 BRAKE VALVE 3/04 (4 pages)
- TC-4 MODULATING CONTROL VALVE (5 pages)
- TC-6 BRAKE VALVE 3/04 (4 pages)
- TC-7 TRAILER CONTROL BRAKE VALVE (4 pages)
- R-8 RELAY VALVE (4 pages)
- RE6 RELAY VALVE 3/05 (12 pages)
- SR-4 SPRING BRAKE CONTROL VLV 7/07 (8 pages)