LO 9-2350-261-12
LUBRICATION ORDER
10 July 1990
(Supersedes LO 9-2350-261-12, JuIy 1985)
NOTES
WARNING
3. DIFFERENTIAL OIL FILTER. Filter is to be
SoIvent burns easily, can cause skin
cleaned each time a differential oil
rash, and can give off harmful vapors. To
change is required. Clean differential oil
avoid injury, keep away from open fire
filter every 150 hours, 1500 miles, or
and use in well-ventilated area. Wear
semiannually, as follows:
protective clothing and rubber gloves.
a. Remove four nuts, flat washers, and
screws securing filter body on head,
1. DIFFERENTIAL BREATHER. Every 150
and remove body (TM 9-2350-261 -20).
hours, 1500 miles, or semiannually, re-
b. Remove element.
move and clean breather with dry clean-
ing solvent (PD-680, Type II). Dry and
WARNING
install breather (TM 9-2350-261 -20).
Dry cleaning solvent burns easily, can
cause skin rash, and can give off harmful
NOTE
vapors. To avoid injury, keep away from
Do not use AOAP on differential. There
open fire and use in well-ventilated area.
are metal particles in brake shoe material
Wear protective clothing and rubber
that can give a false reading.
gloves.
2. DIFFERENTIAL. Before operation, check
c. Clean housing and element with dry
differential oil level to be sure there is
cleaning solvent (PD-680, Type II) and
enough oil for warmup operation. Add oil
install element and housing.
only if level is below safe range. Add oil
d. If element or preformed packings are
(OE/HDO) as needed. Drain differential
unserviceable, install new packings and
every 100 hours, 1500 miles, or semiannu-
element, using differential oil filter kit.
ally. Drain only when hot after operation.
To drain, remove front hull drain plug (TM
e. Install element and body on head, and
9-2350-261-20) and differential drain plug.
secure with four screws, flat washers,
Check differential drain plug for metallic
and nuts. Tighten nuts to 4 to 6 pound-
particles. If metal chips are found, notify
feet torque.
direct support maintenance.
f. Fill differential and check for oil leaks at
filter with engine running.
CARD 13 of 32
