5. HARD TIME INTERVAL. If AOAP Labora-
NOTES
tory support is not available, drain trans-
1. Do NOT mix OE/HDO 15W40 with single
mission every 150 hours, 1500 miles, or
grade lubricants.
semiannually. Drain only when hot after
operation.
2. Complete oil change with filters is re-
quired when converting from OE/HDO
6. TRANSMISSION OIL FILTER. Replace
15W40 to OEA (or OEA to OE/HDO
filter element (TM 9-2350-261-20) each
15W40) in accordance with Temperature
time a transmission oil change is re-
Key Chart.
quired. The filter element will be changed
on a hard time interval. When the AOAP
NOTE
laboratory identifies to replace the oil,
Park carrier on level ground to check oil
reset the hard time interval for the filter
levels. Check/lubricate all oil and grease
element.
fitting points after washing or fording.
NOTE
CAUTION
Visual inspection of transmission oil
Transmission can be damaged if filled
should not be justification to replace oil.
above FULL mark. Check transmission
Modern detergent transmission oils may
oil level before operation. Transmission
appear dark in color due to additives.
oil level should not be above FULL marks
on gage rod.
7. TRANSMISSION OIL DRAIN AND FILTER
ELEMENT REPLACEMENT.
3. TRANSMISSION OIL LEVEL. Before op-
eration, check transmission oil level. Re-
NOTE
move driver's access panel (TM 9-2350-
Drain oil only when hot after operation.
261-10). Add oil (OE/HDO), as needed, to
Allow oil to drain thoroughly for 1 hour, if
bring oil level between ADD and FULL
time permits.
marks on gage rod. With engine discon-
a. Remove hull bottom access cover
nect engaged, start and run engine at 800
(TM 9-2350-261-20).
rpm for 3 to 5 minutes with shift lever in 2-
3 and brakes locked to allow transmission
b. Place suitable container under trans-
oil to reach normal operating temper-
mission drain plug.
ature. With engine idling, move shift lever
c. Remove plug from transmission and
through all ranges to assure complete
drain oil into container. Allow oil to
circulation. Return shift lever to N, and
drain thoroughly for 1 hour, if time
check transmission oil level with engine
permits.
operating at 1500 rpm.
d. Inspect plug and oil for metallic pafli-
4. FREQUENCY OF AOAP SAMPLE: Every
cles. If metal chips are found, notify
60 days, obtain a sample of transmission
direct support maintenance.
oil and send to the nearest AOAP Labora-
tory. For additional reference see TB 43-
0210 and TM 9-2300-422-23&P. Routine
samples are to be submitted at pre-
scribed intervals. Samples should be tak-
en as near the prescribed interval as
possible. If sampling at the prescribed
interval is not always possible, a 10 per-
cent variance, before or after the sched-
uled interval date or miles for sampling, is
permissible. The need for on-condition oil
changes will be determined by the AOAP
Laboratory. Hard time intervals will al-
ways apply to the transmission oil filter
element.
Change 3
CARD 16 of 32
