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4

4. Disconnect all lines and the control cable from the lever

cam.

5. Remove the valve from the vehicle.

VALVE INSTALLATION

1. Install all line fittings and plugs making certain thread

sealing material, if used, does not enter the valve.

2. Install the valve on the vehicle.

3. Reconnect all lines to the valve using the identification

made during VALVE REMOVAL (step 3). Reconnect the
control cable to the lever cam.

4. After installing the valve, test all fittings for excessive

leakage and tighten as needed.

5. Perform operational and leakage inspections prior to

returning the vehicle to service. In the case of a hydraulic
brake system consult the vehicle manual for proper
procedures to be followed.

BW2578  © 2006 Bendix Commercial Vehicle Systems LLC.    6/2006 Printed in U.S.A.   All rights reserved.

Summary of Contents for TW-12 CONTROL VALVE

Page 1: ... in the valve Refer to the following chart and figure one Connection Body Ident Thread Sizex Supply SUP 1 4 P T xx Delivery DEL 1 4 P T xx Vent NONE 1 8 P T xx OPERATION SYSTEM CONNECTIONS AlthoughtheTW 12 valvecanbeusedinavarietyofdifferent systems and connected in different ways figure 2 illustrates a typical hydraulic parking brake system In this system the TW 12 valve controls an HR 1 hydrauli...

Page 2: ...nction promptly to the ON then OFF condition Inspect the exterior of the TW 12 valve If the TW 12 valve is used to control hydraulic brakes no fluid leakage should be noted Pay particular attention to the area around and beneath the lever cam 1 When bench testing the TW 12 control valve attach a small reservoir volume to the delivery port with an air gauge installed Note 6 8 feet of tubing or hose...

Page 3: ...onents 3 Do not attempt to install remove disassemble or assemble a component until you have read and thoroughly understand the recommended procedures Use only the proper tools and observe all precautions pertaining to the use of those tools 4 Following the vehicle manufacturer s recommended procedures deactivate the electrical system in a manner that safely removes all electrical power from the v...

Page 4: ...o the valve using the identification made during VALVE REMOVAL step 3 Reconnect the control cable to the lever cam 4 After installing the valve test all fittings for excessive leakage and tighten as needed 5 Perform operational and leakage inspections prior to returning the vehicle to service In the case of a hydraulic brake system consult the vehicle manual for proper procedures to be followed BW...

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