User manual BENDIX TC-2 TRAILER CONTROL BRAKE VALVE

[. . . ] With the exhaust passage open, air pressure in the service line will exhaust out the exhaust port of the valve. 3. Operating mechanism for remote type should be checked functionally and for proper adjustment. Tighten mounting bolts evenly to approximately 200 inch pounds torque (3/8-16 bolt torque 180-220 inch pounds. ) 5. If remote type valve, connect operating mechanism. PREVENTIVE MAINTENANCE Important: Review the warranty policy before performing any intrusive maintenance procedures. [. . . ] When the handle is moved to the fully applied position, the gauge should register full reservoir pressure. NOTE: Some valves may be preset to deliver lower than reservoir pressure; however, the standard valves generally used on tractors are set to deliver full reservoir pressure. Intermediate positions should deliver proportional intermediate pressures. Upon release, the gauge should immediately register zero. LEAKAGE TEST Locate the exhaust port or exhaust line and apply a soap solution. (It is common practice to connect a line from the valve exhaust port to a location remote from the immediate driver's area. ) With the valve in the released position, exhaust leakage should not exceed a 1" bubble in 5 seconds (100 sccm). With the valve fully applied, leakage at the exhaust should not exceed a 1" bubble in 3 seconds (175 sccm). If the valve does not function as described or leakage is excessive, it is recommended that it be replaced with a new or remanufactured unit, or repaired with genuine parts available at Bendix outlets. CLEANING AND INSPECTION OF PARTS 1. Replace all parts not considered serviceable during their inspection with genuine Bendix replacement parts. REMOVING AND INSTALLING REMOVING 1. Drain air brake system. 2 Adjusting Ring Lock Washer Head O-Ring Adjusting Ring Cam Gasket Piston O-Ring Piston Return Spring Cover Cam Follower Body Graduating Spring Exhaust Valve Spring Stem Inlet Valve Seat Inlet Valve Delivery Port Supply Port Exhaust Port Head Seal O-Ring FIGURE 3 - SECTIONAL VIEW O-Ring Spirol Pin Knob Handle TC-2TM Brake Valve Insert Head O-Ring ASSEMBLY Prior to assembly, lubricate the body and cover bores, cam and cam follower, piston o-ring, and cover top with Dow Corning 55-M pneumatic grease (Bendix piece number 291126). A little water in the boot valve or some soap on the stem will make it easier to press on the inlet valve. Insert some object such as a cap screw to hold the inlet valve up against its seat. Place seal o-ring over insert seat and with cap screws and lock washers install inlet and exhaust insert in body. Install adjusting ring in cover and screw it down until it is flush with top of cover. Connect body to cover; tighten cap screws evenly and torque to 75-95 inch pounds. At this stage, before installing handle and spirol pin of handle-operated type valve, if facilities are available the rebuilt valve should be tested and adjusted. If facilities are not available, the valve can be tested on the vehicle. TESTING REBUILT TC-2TM BRAKE VALVE Perform "Operating and Leakage Tests" as outlined in "Service Checks" section. ADJUSTMENT Generally, the TC-2 TM brake valve should deliver full reservoir pressure; however, there are a few exceptions in special applications. If the delivered pressure is below specified final delivery pressure, it can be adjusted by removing the head and adjusting ring lock washer and rotating the adjusting ring clockwise to raise the delivery pressure. [. . . ] If the vehicle is equipped with an AD-IS® air dryer system or a dryer reservoir module, be sure to drain the purge reservoir. Following the vehicle manufacturer's recommended procedures, deactivate the electrical system in a manner that safely removes all electrical power from the vehicle. Never connect or disconnect a hose or line containing pressure; it may whip. Never remove a component or plug unless you are certain all system pressure has been depleted. [. . . ]