19 March 1990
Supersedes LO 9-2350-266-12, dated 10 April 85.
CARRIER, PERSONNEL, FULL TRACKED,
ARMORED FIRE SUPPORT,
References: TM 9-2350-266-10, TM 9-2350-266-20, TM 9-2350-261-20, TB 43-0210, and CL9100SL
4. FREQUENCY OF AOAP SAMPLE. Every 60 days, obtain sample of transmission oil. Send this
sample to nearest AOAP laboratory. For additional reference, see TB 43-0210. Routine samples
are to be submitted at prescribed intervals. Samples should be taken as near prescribed interval
as possible. If sampling at prescribed interval is not always possible, a 10 percent variance before
or after scheduled interval date or miles for sampling is permissible. The need for on-condition oil
changes will be determined by AOAP laboratory.
5. HARD TIME INTERVAL. If AOAP laboratory support is not available, drain transmission every
150 hours, 1500 miles, or semiannually. Drain only when hot (after operation).
6. TRANSMISSION OIL FILTER. Filter element will be replaced each time a transmission oil
change is required. (See TM 9-2350-261-20 for transmission oil filter element remov-
Visual inspection of transmission oil should not be justification to replace oil. Modern
detergent transmission oils may appear dark in color due to the additives.
Drain oil only when hot (after operation). Allow oil to drain thoroughly for 1 hour if
TRANSMISSION OIL DRAIN AND FILTER ELEMENT REPLACEMENT.
a. Remove hull bottom access cover (TM 9-2350-261-20).
b. Place a suitable container under transmission drain plug.
c. Remove plug from transmission and drain oil into container. Allow oil to drain
thoroughly - 1 hour if time permits.
d. Inspect plug and oil for metallic particles. If metal chips are found, notify direct support
e. Clean and install drain plug to transmission.
Dry cleaning solvent burns easily, can cause skin rash, and can give off harmful
vapors. To avoid injury, keep away from open fire and use in well-ventilated area.
Wear protective clothing and rubber gloves.
f. Remove element, clean cavity with dry cleaning solvent P-D-680, and install new
g. Fill transmission with approximately 16 quarts (refill capacity) of OE/HDO or OEA, as
listed in Key, to bring level between FULL and ADD marks on gauge rod.
h. After filling transmission, check for oil leaks at filter with engine running.
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