User manual BENDIX TC-6 BRAKE VALVE

[. . . ] Every 900 hours, 25, 000 miles or every 3 months, drop some lubricant such as BW-650M silicone lubricant (Bendix part number 291126) (Dow Corning 55-M) through the handle operating slot, to re-lubricate the cam roller and hinge pin. Perform operating and leakage tests. If the valve does not function as described, or if the leakage is excessive, it is recommended that it be returned to the nearest Bendix authorized distributor for a factory remanufactured valve under the exchange plan. If this is not possible, the valve can be repaired with genuine Bendix parts, in which case the following should be helpful. The maintenance kit for the TC-6TM valve is part number 289890. DISASSEMBLY Remove the valve from the panel. [. . . ] Replace any which show signs of wear or deterioration. Inspect valve seats for nicks or burrs and remove any deposits. Check all springs for distortion, cracks and corrosion. Replace all parts not considered serviceable after inspection. SERVICE CHECKS OPERATING Connect an accurate test gauge to the trailer service line hose and leave the trailer emergency or supply hose connected to the trailer or if a trailer is not available, connect the trailer supply hose to an unvented dummy coupling or to a plugged hose fitting. The trailer supply valve should be in the normal position. When the operating lever is moved to the fully applied position, the gauge should register full reservoir pressure. Intermediate positions should deliver proportional intermediate pressures. Upon release, the gauge should immediately register zero. The location of the atmospheric end of the exhaust line from the valve should be found, probably in the engine compartment. With the TC-6TM valve in the release position, no pressure should register on the test gauge and leakage at the end of the exhaust line should not be greater than 100 SCCM (1" bubble in 5 seconds). With the valve fully applied, leakage at the exhaust line should not be greater than 175 SCCM (1" bubble in 3 seconds). 2 ASSEMBLY Before assembling the valve all bores, cam, pivot pin, plungers, and o-rings should be lubricated with silicone lubricant Dow Corning 55-M (Bendix part number 291126). Place body in a soft-jawed vise with ports pointing up. Place inlet valve (2) in inlet cavity and install inlet valve spring (3). Place o-ring (1) on cap nut (16) and assemble cap nut in body. Install o-rings (5) and (7) on plunger (12) and cam follower (9). Caution: o-ring (7) is slightly larger than (5) and goes on the cam follower (9). Reverse position of body in vise and install plunger return spring (4), plunger (12), washer (15), graduating spring (6), and cam follower (9). Note: The cam follower must be positioned so that the projection on the side of the body matches the corresponding groove in the body. DOUBLE CHECK VALVE SERVICE LINE TP-3TM VALVE TO REAR BRAKES TC-6TM VALVE TO FRONT BRAKES DOUBLE CHECK VALVE REAR BRAKE RESERVOIR SUPPLY RESERVOIR FRONT BRAKE RESERVOIR FIGURE 3 Position the torsion spring (8) in its approximate position in the body so that the end which engages the handle rests against the side of the body opposite the bracket retaining screw holes. Place the roller cam (11) in position as shown in Fig. 2 and insert pivot pin (13) through the torsion spring and partially through the roller cam, leaving room to insert the wedge shaped end of the handle. With a small screwdriver or similar tool, force the tang of the torsion spring towards the opposite wall of the body far enough so the handle (10) may be inserted into the roller cam. The pivot pin (13) may then be tapped on through until the ends of the pin are flush with either side of the body. [. . . ] Never exceed manufacturer's recommended pressures. 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. 8. Use only genuine Bendix ® replacement parts, components and kits. [. . . ]