TM 10-4320-307-244-10LUBE OIL PUMP ASSEMBLY REPAIR (CONT).NOTEIf plug depth is within specifications and engine oilpressure is out of specifications, remove andinspect bypass valve (14).15. Using depth micrometer (13), measure the installed depth of the bypass valve (14) retainer plug (15), located in pump body (1). If plug depth is less than 0.255 inch (6.48 mm) use pressure valve fixture to install it to depth of 0.255 to 0.275 inch (6.48 to 6.98 mm).Hold in on retaining plug to keep it from springout of bore due to spring compression. Failureto do this may cause personal injury.16. If required, use light duty puller kit to remove retaining plug (15).17. Remove valve disc (16), washer (17), and bypass valve spring (18).18. Inspect all parts for damage.19. Inspect spring (18) for damaged or broken coils.20. Using valve spring tester, compress bypass valve spring (18) to a height of 1.145 inches (29.0 mm). The force required to compress the spring to this height must be 59 to 72 lbs (260 to 320 N). Replace spring if itdoes not conform to this standard.21. Measure bypass valve seat depth in pump body (1). Maximum allowable depth is 1.840 inches (46.73 mm).If depth exceeds this limit, replace pump body.22. Measure outside diameter of drive shaft and idler shaft.Replace shaft if outside diameter is under 0.6145 inch (15.608 mm).23. Measure inside diameter of bushings. Replace bushingif inside diameter exceeds 0.6185 inch (15.710 mm). Use bushing mandrel and arbor press to remove bushing.4-75
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
