User manual BENDIX SL-3-SL-4 STOP LIGHT SWITCH

[. . . ] If the stop light switch does not function as described or if leakage is excessive, it is recommended that it be replaced with a new unit or repaired with genuine Bendix parts available at authorized Bendix parts outlets. CLEANING AND INSPECTION Clean all metal parts in cleaning solvent. Inspect contact points for pits or wear. If pitting is not too severe, the points may be reconditioned by filing with a distributor point file. If points cannot be reconditioned, they should be replaced. [. . . ] Position terminals (9) in cover (8) and secure with washers and nuts or terminal clips. Place o-ring diaphragm (14) and piston (13) in body. O-ring diaphragm should be installed with its flat side adjacent to the piston. Place gasket (15) in place on body and contact strip (12) on piston (13). Position cover assembly on gasket and secure with machine screws. Torque to 20 inch pounds. INSTALLING 1. Install in a convenient location for servicing. Install with pipe tap pointing to the ground and keep it high for adequate drainage. Connect the stop light switch in series in the stop light circuit. Keep the stop light switch terminals away from frame members to avoid grounding. Connect the pipe tap to the brake chamber supply line so that the stop light switch will operate whether the foot or hand valve is applied. DISASSEMBLY (SL-3TM SWITCH) 1. Using a large end wrench on cover flats, turn cover (1) in a counterclockwise direction and remove from body. Remove terminal nuts, terminals (2) and terminal connector (7) from cover. Remove spring (3), plunger (4), washer (5) and diaphragm (6) from body. Remove two machine screws (7) and remove cover (8). Remove terminal nuts and terminals (9) from cover. Remove spring (11), contact strip (12), piston (13) and o-ring diaphragm (14) from body. TEST OF REBUILT STOP LIGHT SWITCH Both operating and leakage tests, as indicated under section headed "Testing for Serviceability", must be made after rebuilding or repairing the stop light switch. The switch must meet the following specifications; 1. No leakage is permissible at the stop light switch with the brakes applied. The stop light switch contact should close with not more than 7 pounds of air pressure. 2 PRECAUTIONARY NOTE: WARNING! [. . . ] 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. Use only genuine Bendix ® replacement parts, components and kits. Replacement hardware, tubing, hose, fittings, etc. [. . . ]