TM 5-3805-262-343-22. CONTROL VALVE ASSEMBLY MAINTENANCE (CONT) e. MainReliefValve.This task covers disassembly, cleaning, inspection, andreassembly of main relief valve.TOOLS: No. 1 Common Organizational Maintenance Tool KitSafety glassesScrewdriverFixed open end wrench setViseVise jaw capsRodSpring gageMachinist’s steel ruleMATERIALS/PARTS: Clean cloths (Appendix C, item 1)Cleaning solvent P-D-680 (Appendix C, item 2)Lubricating oil (Appendix C, item 15)Backup rings (FSCM 10988 PN L32619)O-ring (FSCM 10988 PN 218-5007)O-rings, two (FSCM 10988 PN A30843)O-ring (FSCM 10988 PN 218-5009)NOTEPRELIMINARY PROCEDURE: Control valve assembly removed from loader (page3-647) .DISASSEMBLY (SHEET 1 OF 3)Dry cleaning solvent P-D-680 used to cleanWear protective goggles and gloves andparts is toxic and flammable.use only in a well ventilatedarea. Avoid contact with skin, eyes and clothes and don’t breathevapors. Do not use near open flame or excessive heat and don’t smokewhen using it. Failure to do so could cause serious injury. If you be-come dizzy while using cleaning solvent, get fresh air and medicalattention immediately. If contact with skin or clothes is made, flushwith large amounts of water.If contact with eyes is made, wash eyeswith water and get medical aid immediately.(1)Clean all dirt and grease from control valve assembly using cleaning sol-vent P-D-680. Dry using clean cloths.(2)Put control valve assembly on clean work bench.(3) Loosen valve cap (1) and remove valve cap (1) and assembled parts (2 thru11).(4) Remove O-ring (2) , backup ring (3), and O-ring (4) from valve cap (1).Discard O-rings and backup ring.3-688
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