4-37TM5-6115-585-12NAVFAC P-8-262-12TO-35C2-3-455-1TM-05684C-12Figure 4-31. Replacing Oil Pressure Gauge4-33. OIL PRESSURE GAUGE.On ASK equipped generators, remove oil access door.a. Test. Attach a pressure gauge of known accuracybetween flexible oil line and unit pressure gauge. Operate unitfor 1/2 hour and check that both gauges read the same. Atrated rpm the normal oil pressure range is 20 to 45 psi whichis dependent on sir and engine temperature, grade of oil, andwear tolerances on the engine. If the unit pressure gauge isin error by more than 5 lb, replace.b. Remove (see figure 4-31). Disconnect and drainoil line (1) to Oil pressure gauge (7). Remove screw(2),lockwasher (3), clamp (4) and remove oil pres-sure gauge and bracket. Remove fitting (5) and nuts(6) attaching gauge (7) to mounting bracket (8) andremove gauge (7).c. Replace. Install oil pressure gauge (7) on mount-ing bracket (8) with nuts (6) two on each side ofbracket (6). Maintain gap between gauge and bracketas indicated on figure 4-31. Position oil pressuregauge and bracket on engine and install clamp (4),lockwasher (3) and screw (2). Connect and tightenoil line (1).
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