6. OIL FILTERS
Oil filters shall be serviced/cleaned/changed as applicable when:
They are known to be contaminated or clogged.
Service is recommended by AOAP laboratory analysis.
Prescribed hard-time intervals are reached.
Submit oil samples as soon as they have been taken.
AOAP does not do away with seasonal oil changes.
Make oil changes as seasonal temperatures require.
a. Sample oil every 60 days or 1,000 miles (1,609 km). Army Reserve Units will
sample oil every 120 days or 1,000 miles (1,609 km). Oil will be changed only when
directed by oil analysis laboratory.
To check engine oil level, wait at least one minute after shutting down engine to allow oil to
drain into crankcase. Safe operating level is between ADD and FULL on dipstick. Do not overfill.
b. When vehicle or engine is placed in storage other than administrative storage,
service the crankcase with grade 30 engine oil conforming to specification Ml-L-21260,
21260 engine oil is an operational lubricant and may be used until the initial scheduled oil
change after reactivation of the vehicle or engine. For administrative storage, engine oil
conforming to the specification and grade established in Table II, Fluid Capacities and
Lubricant Requirements, should be used.
Drain fuel/water separator daily before vehicle operation. If dirt or water is found in.
drainage, notify unit maintenance for replacement of fuel filter. Replace fuel filter every 6,000
miles (9,654 kilometers) or six months, whichever occurs first.
REAR SPRING SEAT BUSHINGS OR BEARINGS
a. Every 3,000 miles (4,827 km) or semiannually, whichever occurs first, remove
bearing cap and tighten bearing adjusting nut in accordance with TM 9-2320-361-20. install
cop loosely, and lubricate bearings by removing pipe plug in bottom of spring seat and
installing fitting. Lubricate with GAA grease through fitting until lubricant appears around
cap. Remove fitting, and reinstall pipe plug.
b. Every 6,000 miles (9,654 km), or annually, whichever occurs first, remove, clean,
and inspect bearings. Reinstall bearings, tighten adjusting nuts and locknuts, and lubricate
bearings as described in step a. above.
a. Check and fill transmission to proper level weekly.
b. Check oil level of automatic transmission using the following procedure:
(1) Allow engine to idle. Shift transmission to neutral and apply parking brake.
(2) Withdraw dipstick slowly to prevent a false reading. If transmission oil
temperature gauge reads 160°F (71°C) or below, level on dipstick should show between
marks designated for normal run. If transmission oil temperature is above 160°F (71 "C),
allow transmission oil to cool.
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