ARMY TM 9-6115-604-12
NAVY NAVFAC P-8-633-12
OIL SIGHT GAGE READINGS
The oil sight gage is marked to indicate a static (non-operating) HI and LOW oil level. However, with the oil level at the
HI mark statically, the oil level reading will be at the LOW mark when the engine is running. If, while the engine Is
running, the oil level reading should drop to the lowest visible level on the oil sight gage, add an additional 4 gallons
(15.2 L) of oil until the level Is brought back to the LOW level mark.
Inspect See Figure 3-3. Perform the following procedures with the engine shut down.
Loosen the oil filler cap by turning counterclockwise to allow crankcase air pressure to escape.
Remove the oil level gage by pulling out from engine. Wipe oil from the oil level gage.
Check oil level by reinserting oil level gage and pulling out. Oil level reading should be at the HI mark on
the oil level gage If oil level is below the HI mark, add oil in accordance with step (d), below
Do not fill crankcase above the HI mark on the oil level gage.
Remove crankcase oil fill cap (see Figure 3-3). Add oil as required to obtain a HI level reading on oil level
gage. Refer to Table 3-1 for proper lubricating oil Reinstall and tighten oil fill cap and oil level gage after
oil fill procedure.
Dry cleaning solvent P-D-80, Type II, is flammable and toxic to the skin, eyes, and respiratory
tract. Skin, eye, and respiratory protection is required to prevent injury to personnel.
After each operating interval of 300 hours, remove crankcase breather (see Figure 3-19) and clean with
cleaning solvent. P-D-680, Type II, or equivalent Dry with compressed air and reinstall on engine.