TM 5-6115-584.12NAVFAC P-8-622-12TO-35C2-3-456-1TM-05682C-12Figure 4-31. Replacing Oil Pressure Gauge4-33. OILPRESSUREGAUGE.Iockwasher (9), clamp (4) and remove oil Pressure gaugeand bracket. Remove fitting (5) and nuts (6) attachingOn ASK equipped generators, remove oil access door.gauge (7) to mounting bracket (8) and remove gauge (7).a. Test. Attach a pressure gauge of known accuracy betweenflexible oil line and unit pressure gauge. Operate unit for 1/2 hourand check that both gauges read the same. At rated RPM thenormal oil pressure is 20 to 45 PSI which is dependent on airand engine temperature, grads of oil, and wear tolerance ofengine. If the unit pressure gauge is in error by more than 5Ibs, replace.c. Replace. Install oil pressure gauge (7) on mountingbracket (8) with nuts (6) two on each side of bracket (8).Maintain gap between gauge and bracket as indicated onfigure 4-31. Position oil pressure gauge and bracket onengine and install clamp (4), lockwasher (3) and screw (2).Connect and tighten oil line (1).b. Remove (see figure 4-31). Disconnect and drainoil Iine (1) top oil pressure gauge (7), Remove screw (2),Change 74-37
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