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|  MIL-T-62531(AT)
APPENDIX A
Verification Lessons Learned
3.4.5.5 Oil filler and gage. The crankcase oil filler location shall allow oil to be readily
poured into the filler opening without requiring the use of a funnel and using a container
conforming to type II 5-quart size of PPP-C-96 and type II 5-gallon of PPP-P-704. The engine
shall be provided with a properly accessible waterproofed bayonet gage (dipstick) that ensures
ready and accurate reading of crankcase oil level with engine stopped.
Rationale
Provide a readily accessible engine crankcase oil filler port that is compatible to current
military oil containers. Use of a readily accessible oil filler will preclude oil spillage and insure
ease of maintenance. An easily accessible and accurate bayonet type oil gage (dipstick) will
ensure that the oil level is checked during prescribed maintenance. Adequate oil levels in the
safe operating zones will enhance anticipated engine life. Overfilling or underfilling the oil level
may cause damage to the engine.
Guidance
Locate the oil filler tube in the engine compartment in an easily accessible position where
there are no components and or body braces which would impede the addition of oil from the
prescribed oil containers. Locate the oil dipstick in an easily accessible and visible location
which can be reached by hand with a minimum of stretching or climbing on the vehicle to check
the oil level.
Lessons Learned
Oil level dipsticks and oil filler tubes that are difficult to reach may be bypassed by the
maintenance personnel responsible for this requirement.
4.4.5.5 Oil filler and gage examination. To determine conformance to 3.4.5.5 oil shall be
poured into the crankcase filler opening from specified containers. Caution, do not overfill
engine sump. Check oil level by use of the dipstick on flat, level surface.
Verification Rationale
Demonstration of pouring oil into the crankcase filler port must be accomplished using the
specified 5 quart and 5 gallon container to verify adequate clearance for pouring the oil into the
filler tube without spillage. Withdraw the oil dipstick to check the oil level in the crankcase.
The dipstick shall be in a position that is readily accessible to reach, withdraw, and replace
without interference. The dipstick shall be marked with "full", "safe", and "add" operating
levels.
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