BENDIX SD-03-3515 User's Manual
Contents
1. SUPPLY PORT DELIVERY MOUNTING HOLES PLUGGED PORT FIGURE 1 BENDIX RV 3 INVERSION VALVE GENERAL DESCRIPTION The Bendix RV 3 pressure reducing valve is a normally open pressure control device The function of the RV 3 valve is to reduce system air pressure and maintain a constant specified pre set pressure below that of system pressure Various pressure settings can be obtained through the use of springs and shims in combination The Bendix RV 3 valve has one supply port and one delivery port A single pipe plug is installed in the control port and should remain in place for most applications of the RV 3 valve A rubber exhaust diaphragm is installed in the end of the valve opposite the supply port Two 28 7 1mm mounting holes are cast into the valve body Bendix RV 3 Pressure Reducing Valve SD 03 3515 SUPPLY CAP NUT O RING SUPPLY CAP NUT VALVE STOP INLET VALVE SPRING INLET EXHAUST VALVE VALVE BODY SHIMS PISTON O RING PISTON OUTER AND OR INNER SPRING EXHAUST NUT EXHAUST DIAPHRAGM RETAINER MOUNTING LOCATION Care should be given to assure proper mounting location The valve should be mounted with the exhaust pointed downward toward the road surface and mounted high on the frame rail It should be away from road spray and debris Unprotected or exposed exhaust ports can allow migration of road contaminants into the valve which may cause ac2. compartment the engine system pressure has been depleted should be shut off and the ignition key should 8 Use only genuine Bendix brand replacement be removed Where circumstances require parts components and kits Replacement that the engine be in operation EXTREME hardware tubing hose fittings etc must be CAUTION should be used to prevent personal of equivalent size type and strength as original injury resulting from contact with moving equipment and be designed specifically for rotating leaking heated or electrically charged such applications and systems components 9 Components with stripped threads or damaged 3 Do not attempt to install remove disassemble parts should be replaced rather than repaired or assemble a component until you have read Do not attempt repairs requiring machining or and thoroughly understand the recommended welding unless specifically stated and approved procedures Use only the proper tools and by the vehicle and component manufacturer observe all precautions pertaining to use of 10 Prior to returning the vehicle to service make those tools certain all components and systems are 4 If the work is being performed on the vehicle s restored to their proper operating condition air brake system or any auxiliary pressurized 11 For vehicles with Automatic Traction Control air systems make certain to drain the air ATC the ATC function must be disabled pressure from all reservoirs before beginning ATC
3. indicator lamp should be ON prior to ANY work on the vehicle If the vehicle is performing any vehicle maintenance where one equipped with a Bendix AD IS air dryer system or more wheels on a drive axle are lifted off the or a dryer reservoir module be sure to drain the ground and moving purge reservoir 5 Following the vehicle manufacturer s
4. 00 psi sec Delivery pressure should be within 5 psi of the delivery pressure specified for the RV 3 valve If not the valve should be replaced If the valve meets this operating test proceed to the leakage tests Do not remove the gauges at this time LEAKAGE With supply pressure at the level recommended by the vehicle manufacturer apply a soap solution to the 1 8 N P T plug around the supply port cap nut and to the exhaust port Leakage should not exceed 100 SCCM ora 1 diameter bubble in 5 seconds If leakage is excessive the valve should be replaced and the operating and leakage tests performed at the time of replacement Proceed to the Removal and Installation instructions This completes the operation and leakage tests and the test gauges should be removed REMOVAL amp INSTALLATION REMOVAL 1 Hold the vehicle on a level surface by means other than the air brakes 2 Remove all air pressure from all reservoirs 3 Identify mark and then disconnect all air lines attached to the valves 4 Remove the valve INSTALLATION 1 Inspect and clean all air lines that connect to the valve 2 Clean the vehicle valve mounting area and mount the valve 3 Reconnect the air lines according to the identification marks made during removal PREVENTIVE MAINTENANCE Important Review the Bendix Warranty Policy before performing any intrusive maintenance procedures A warranty may be voided if intrusive m
5. aintenance 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 Bendix RV 3 valve should be inspected every 6 months or 1500 operating hours whichever comes first for proper operation Should the RV 3 valve not meet the elements of the operational tests noted in this document further investigation and service of the valve may be required BW1587 2011 Bendix Commercial Vehicle Systems Company LLC a member of the Knorr Bremse Group 7 2011 All Rights Reserved GENERAL SAFETY GUIDELINES WARNING PLEASE READ AND FOLLOW THESE INSTRUCTIONS TO AVOID PERSONAL recommended procedures deactivate the electrical system in a manner that safely removes all electrical power from the vehicle INJURY OR DEATH When working on or around a vehicle the following general precautions should be observed at all times 1 Park the vehicle on a level surface apply the 6 Never exceed manufacturer s recommended parking brakes and always block the wheels pressures Always wear safety glasses 7 Never connect or disconnect a hose or line 2 Stop the engine and remove ignition key when containing pressure it may whip Never remove working under or around the vehicle When a component or plug unless you are certain all working in the engine
6. celerated wear or unintended operation OPERATION The spring force exerted on the piston determines the delivery pressure of the valve With no air pressure present at the supply port the inlet valve is unseated and open while the exhaust passage through the center of the piston is sealed by the exhaust valve Compressed air entering the supply port flows out the delivery port Air simultaneously flows between the piston stem and valve body to the 1 underside of the piston When air pressure on the piston overcomes the spring force the piston moves and forces the inlet valve on its seat closing off the supply of air The exhaust remains closed If air pressure in the delivery line drops the spring force on the piston overcomes the air pressure Subsequent piston movement will unseat the inlet valve allowing additional air pressure into the delivery line If pressure in the delivery line exceeds the pressure setting of the valve the force exerted by the air pressure will be greater than the spring force The piston will move away from the exhaust valve permitting air to flow past the exhaust valve through the hollow piston stem and out the exhaust port The inlet valve remains seated OPERATING amp LEAKAGE TESTS OPERATING Connect an accurate test gauge in the supply and delivery lines of the Bendix RV 3 valve Make certain that supply air pressure is at the vehicle manufacturer s recommended level applied at a rate of 1
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