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TM 10-3930-638-24&P
2-31. SENDING UNITS AND SWITCHES MAINTENANCE (cont)
d. Engine Oil Pressure Switch and Sending Unit (cont).
STEP
LOCATION
ITEM
ACTION
REMARKS
REMOVAL
I
Engine compart-
a. Harness connector (1)
Grasp and pull
From terminal on switch (6)
ment rear, right
b. Nut (2), lock washer
Remove
From terminal on sender (5)
side of vehicle
(3) and wire lead (4)
c. Sender (5) and
Remove
Turn counterclockwise and pull from
switch (6)
tee (7)
d. Tee (7) and fitting (8)
Remove
Turn counterclockwise and pull from
engine block
e. Retainer halves (9)
Push together,
Remove resistor (10)
turn counter-
clockwise and
separate
CLEANING
WARNING
Dry cleaning solvent (P-D-680), used to clean parts is toxic and
flammable. Wear protective goggles and gloves and use only in a
well ventilated area. Avoid contact with skin, eyes, and clothes
and don’t breathe vapors. Do not use near open flame or
excessive heat and don’t smoke when using it. Failure to do so
could cause serious injury. If you become dizzy while using
cleaning solvent, get fresh air immediately, and get medical
attention. If contact with skin or clothes is made, flush with large
amounts of water. If contact with eyes is made, wash eyes with
water immediately, and obtain medical aid immediately.
WARNING
Wear safety glasses when drying parts with compressed air.
Failure to do so could cause serious injury to eyes and possible
blindness. If you hurt your eyes or if a foreign object is blown into
your eyes. seek medical attention immediately.
2
Nut (2), lock washer (3),
Clean
Use cleaning solvent P-D-680.
tee (7) and fitting (8)
Dry thoroughly with compressed air
3
Wire connectors and
Clean
Use cleaning solvent P-D-680 on
switch terminals
connectors and terminals only
INSPECTION
4
Nut (2), lock washer (3),
Inspect
Replace if worn or cracked, or if threads
tee (7) and fitting (8)
damaged
5
Harness wires
Inspect
Replace if insulation frayed, or if
conductor broken
2-168 CHANGE 2
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