User manual BENDIX SV-1 SYNCHRO-SV-3 TRAILER RELEASE

[. . . ] Two hex cap nuts at the ends of the cylindrical valve body retain the internal 1 SD-03-4020 components. The air connection ports for SV-1TM, SV-3TM & SV-4TM valves are the same and are located in relatively the same position on each model. Lettering embossed in the valve body identifies two of the four connection ports in these valves. Refer to the chart below and figure one. [. . . ] The pressure at which delivery and exhaust occurs differs for various part numbers. Opening and exhaust pressure is specified for the various part numbers. SV valves can be made to operate automatically even when the supply port and control ports are separate (not connected as described in #1 above). The SV valve will open (deliver air) and close (and exhaust) when control port pressure is increased or decreased. Consult Bendix Engineering for specific control port pressure for valve opening and closing when this type of automatic operation is used. When using the SV-1TM synchro valve in this manner, the control signal ramp rate should be limited by orificing or other methods. Please contact Bendix Engineering with specific application requirements. 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. No two vehicles operate under identical conditions, as a result, maintenance intervals may vary. Experience is a valuable guide in determining the best maintenance interval for air brake system components. At a minimum, the SV valves should be inspected every 6 months or 1500 operating hours, whichever comes first, for proper operation. Should the SV valves not meet the elements of the operational tests noted in this document, further investigation and service of the valve may be required. If the SV-1TM, SV-3TM, or SV-4TM valve fails to function as described or leakage is excessive, it should be repaired or replaced with a genuine Bendix unit, available at any authorized parts outlet. WARNING!PLEASE READ AND FOLLOW THESE INSTRUCTIONS TO AVOID PERSONAL INJURY OR DEATH: When working on or around a vehicle, the following general precautions should be observed at all times. Park the vehicle on a level surface, apply the parking brakes, and always block the wheels. Stop the engine and remove ignition key when working under or around the vehicle. When working in the engine compartment, the engine should be shut off and the ignition key should be removed. Where circumstances require that the engine be in operation, EXTREME CAUTION should be used to prevent personal injury resulting from contact with moving, rotating, leaking, heated or electrically charged components. 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 use of those tools. If the work is being performed on the vehicle's air brake system, or any auxiliary pressurized air systems, make certain to drain the air pressure from all reservoirs before beginning ANY work on the vehicle. If the vehicle is equipped with an AD-ISTM air dryer system or a dryer reservoir module, be sure to drain the purge reservoir. [. . . ] Remove the piston return spring from the body. Install the o-ring on the supply cap nut then install and tighten the cap nut. Torque to approximately 100 inch pounds. Install the small and large diameter o-rings on the piston. [. . . ]