ARMY TM 9-6115-642-24
AIR FORCE TO 35C2-3-455-12
MARINE CORPS TM 09247A/09248A-24/2
2-89.4. Adjustment.
a.
Shut down generator set
b.
Open left side engine access door and remove control cable wedge (2, FIGURE 2-24) from governor
speed lever (3).
c
Loosen jam nuts on both speed adjust bolts on governor control and turn bolts counterclockwise until
they do not touch speed lever (3).
d.
Adjust frequency control adjust cable (6) with nuts (4) and (7) and connect cable to speed lever (3) so
that lever is positioned approximately mid-range.
e.
Start generator set. Using frequency adjust control, adjust frequency to 65 Hz (420 Hz for MEP-813A)
f.
Turn high speed adjust bolt on governor control until it contacts speed lever (3) and tighten jam nut.
g.
Using frequency adjust control, adjust frequency to 58 Hz (388 Hz for MEP-813A).
h.
Turn low speed adjust bolt on governor control until it contacts speed lever (3) and tighten jam nut.
i
Using frequency adjust control, cycle generator set frequency from minimum to maximum and back to
minimum to verify settings.
j.
Readjust high or low speed adjust bolts on governor control as needed to obtain required frequency
adjustment range.
k.
Shut down generator set and close left side engine access door.
2-90. LOW OIL PRESSURE SWITCH.
NOTE
Prior to performing this test, refer to TM9-2815-252-24 and verify engine has good
oil pressure.
2-90.1. Testing.
a.
Shut down generator set.
b.
Open left side engine access door.
c.
Tag and disconnect low oil pressure switch (1, FIGURE 2-25) electrical leads.
d
Set multimeter for ohms and connect across switch connector pins C and NO. Multimeter shall indicate
open circuit.
e.
Connect multimeter across switch connector pins C and NC. Multimeter shall indicate continuity.
f.
Start generator set. Place BATTLE SHORT switch in ON position before releasing MASTER SWITCH
from START position.
g.
Connect multimeter across switch connector pins C and NO. Multimeter shall indicate continuity
h.
Shut down generator set. Return BATTLE SHORT switch to OFF position.
i.
j.
Connect electrical leads remove tags and close left side engine access door.
2-90.2. Removal.
a.
Shut down generator set.
b.
Open left side engine access door and disconnect negative battery cable.
c.
d.
Unscrew low oil pressure switch (1) from fitting on left side rear engine wall
