SD-03-4020 ® Bendix® SV-1™ Synchro Valve SV-3™ & SV-4™ Trailer Release Valve CONTROL CONTROL EXHAUST EXHAUST DELIVERY DELIVERY SUPPLY SUPPLY BENDIX® SV-3™ VALVE BENDIX® SV-4™ VALVE 1/4" P.T. CONTROL 1/4" P.T. CONTROL CAP NUT O-RING CAP NUT O-RING O-RING PISTON O-RING PISTON SPRING O-RING PISTON PISTON SPRING O-RING 1/8" P.T. EXHAUST BODY 1/8" P.T. EXHAUST 1/4" P.T. DELIVERY 1/4" P.T.
GENERAL SAFETY GUIDELINES WARNING! PLEASE READ AND FOLLOW THESE INSTRUCTIONS TO AVOID PERSONAL INJURY OR DEATH: When working on or around a vehicle, the following guidelines should be observed AT ALL TIMES: ▲ Park the vehicle on a level surface, apply the parking brakes and always block the wheels. Always wear personal protection equipment. ▲ Stop the engine and remove the ignition key when working under or around the vehicle.
Bendix® SV-3™ Trailer Release Valve While originally designed for automatic operation to accomplish brake release on trailers without spring brakes, the Bendix® SV-3™ valve can be used in any installation where its single automatic pressure setting is advantageous. The SV-3 valve is very similar in appearance to the Bendix® SV-4™ valve but can be distinguished by measuring the length and diameter of the supply hex cap nut (1/4" PT supply port). See the comparison chart for the dimensions.
PREVENTIVE MAINTENANCE Important: Review the Bendix Warranty Policy before performing any intrusive maintenance procedures. A warranty may be voided if intrusive maintenance is performed during the warranty period. - For the SV-3 & SV-4 valves - leakage must not exceed a one (1) inch bubble in less than 10 seconds (50 sccm). Excessive leakage would indicate a faulty inlet valve or inlet valve seat.
4. Inspect the pipe threads in the body and cap nuts. Make certain they are clean and free of thread sealant. 5. Inspect all springs for signs of corrosion, pitting and cracks. Replace as necessary. 6. Inspect all air line fittings for corrosion and replace as necessary. Make certain to remove all old thread sealant before reuse. 7. Inspect the exhaust check valve making certain all passages are clear and open.
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