BENDIX TCH-002-006 User's Manual
Contents
1. Technical Bulletin Bulletin No TCH 002 006 Effective Date 11 1 2007 Cancels N A Page 1 of 2 Subject Bendix Air Disc Brake Spring Brake Actuator Caging Procedure The following procedure is for manually caging and or un caging releasing a Bendix Air Disc Brake Spring Brake Actuator Spring Brake Housing Service Housing Spring Brake Housing Release Bolt SMM dl 33A Push Rod Service Housing Parking Brake 12 Service Port 11 Figure 1a Spring brake shown in the caged position Figure 1b Air disc brake assembly Un Caging releasing the Parking Brake 1 Install the spring brake actuator on the air disc brake if not previously installed Refer to service data sheet SD 23 7541 BW7308 See Figure 1b 2 Connect a regulated air line to parking brake port 12 of the actuator if not connected previously See Figure 1a 3 Gradually supply 100 psi of air pressure to the parking brake port 12 of the actuator 4 Rotate the release bolt clockwise until resistance is encountered 5 Seat the release bolt in the un caged position by applying a torque of 50 lb ft The release bolt and push rod should be in the position shown in Figure 2 6 With hands clear of moving parts slowly release the air pressure to the parking brake port 12 Be2. si to the parking brake port 12 This practice may damage the caging bolt and or the parking brake which could result in the need to replace the spring brake actuator DO NOT USE an impact wrench to rotate the caging bolt Please refer to service data sheet SD 23 7541 BW7308 for complete service instructions for Air Disc Brakes products from Knorr Bremse Bendix and Bendix Spicer Foundation Brake
3. sure to exercise Caution to prevent pinching of fingers Push Rod P Release Bolt a Service Port 11 Parking Brake 12 Figure 2 Spring brake shown in the un caged released position over 2007 Bendix Commercial Vehicle Systems LLC 11 2007 All rights reserved Printed in U S A Caging the Parking Brake 1 Connect a regulated air line to parking brake port 12 of the actuator if not connected previously 2 Gradually supply 100 psi of air pressure to the parking brake port 12 of the actuator 3 Rotate the release bolt counterclockwise until resistance is encountered 4 Seat the release bolt in the caged position by applying torque of 25 lb ft The release bolt and push rod should be in the position shown in Figure 1a 5 With hands clear of moving parts slowly release the air pressure to the parking brake port 12 Be sure to exercise Caution to prevent pinching of fingers Notes As always follow all recommended safety procedures when performing any service on your vehicle s w N The release bolt cannot be removed from the parking brake The nut is permanently attached to the release bolt Unless a vehicle must be moved in an emergency situation NEVER ATTEMPT to Cage or Un Cage the parking brake without applying air pressure 100 p
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