Figure 4-31. Replacing Oil Pressure Gauge
4-33. OIL PRESSURE GAUGE.
On ASK equipped generators, remove oil access door.
a. Test. Attach a pressure gauge of known accuracy
between flexible oil line and unit pressure gauge. Operate unit
for 1/2 hour and check that both gauges read the same. At
rated rpm the normal oil pressure range is 20 to 45 psi which
is dependent on sir and engine temperature, grade of oil, and
wear tolerances on the engine. If the unit pressure gauge is
in error by more than 5 lb, replace.
b. Remove (see figure 4-31). Disconnect and drain
oil line (1) to Oil pressure gauge (7). Remove screw
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) and
remove gauge (7).
c. Replace. Install oil pressure gauge (7) on mount-
ing bracket (8) with nuts (6) two on each side of
bracket (6). Maintain gap between gauge and bracket
as indicated on figure 4-31. Position oil pressure
gauge and bracket on engine and install clamp (4),
lockwasher (3) and screw (2). Connect and tighten
oil line (1).