TM 5-3895-374-24-2 SECTION 20 BULLETIN 20.95 R RELIEF VALVE INSTRUCTIONS DISASSEMBLY (1) Remove valve bonnet {2)     Measure and record the length of extension of the adjusting screw. (3)     Loosen the adjusting nut and rotate the adjusting screw counter-clockwise until the spring pressure is released fully. (4)     Remove the cap, retainer, disc, spring and poppet, from the valve body.  Clean and Inspect all parts for wear or damage and replace If necessary. REASSEMBLY Simply reverse the procedure outlined under disassembly.  If the valve has been removed from the pump for inspection, be sure to replace In the same position.  The bonnet should point towards the suction port. PRESSURE ADJUSTMENT The pressure setting on any relief valve supplied on a pump should be adjusted and/or checked for setting on Individual ap- plications as the valve is supplied with a spring that Is adjusta- ble within a given pressure range. To check the setting place a pressure gauge In the discharge line between the pump and discharge gate valve.  Slowly close the gate valve until full bypass pressure is obtained.  This pres- sure should be greater than the normal operating pressure If not, it can be increased by turning the relief valve adjusting screw inward until the desired setting is achieved.  After the re- lief valve has been set, the locking nut can be tightened and the bonnet can be re-assembled. When ordering relief valve springs, be sure to state the maximum operating pressure required. REPLACEMENT PARTS LIST ITEM NO. NAME OF PART 1 BODY 2 POPPET 3 SPRING 4 RETAINER DISC 5 ADJUSTING SCREW 6 ADJUSTING NUT ITEM NO. NAME OF PART 7 CAP 8 BONNET 9 GASKET (PORT) 10 GASKET (CAP) 11 GASKET (BONNET) (page 3 - 898)