NOTES
recommended by AOAP laboratory analysis or at
prescribed hardtime intervals of 400 hours or 6
h. After expiration of warranty, active Army units
months, whichever occurs first. For oil samples that
will send an engine oil sample to an AOAP laborato-
are rejected and the AOAP recommends changing
ry for analysis every 100 hours of operation or 90
lubricant and filter(s), the hardtime filter service
days, whichever occurs first. Reserve and National
clock restarts at "0".
Guard units will send an oil sample to an AOAP lab-
(6) The top trunnion bearing should be given
oratory for analysis every 100 hours of operation or
10-12 strokes with a grease gun through existing
180 days, whichever occurs first.
grease fitting.
i. Intervals for sampling as well as draining and
(7) The plug below the trunnion bearing
refilling lubricants may be changed by an AOAP
(Views AB and AC) should temporarily be removed
laboratory.
and a grease fitting installed. The lower trunnion
j. If AOAP laboratory support is not available,
bearing should be lubed with 10-12 strokes from the
drain and refill crankcase oil every 3,000 mi (4 900
grease gun. The fitting should then be removed and
km) or every 6 months, whichever comes first, and
the plug reinstalled.
drain and refill transmission oil every 6,000 mi (9
k. Hydraulic Oil Reservoir.
700 km) or annually, whichever comes first. Drain
To drain oil reservoir, remove bottom drain plug
and refill hydraulic reservoir every 6,000 mi (9 700
(See TM 9-2320-279-20).
km) or annually, whichever comes first.
3. FIFTH WHEEL. Clean and recoat the parts
(1) Crankcase oil will be changed only when
more often when the vehicle is operated in sandy
directed by an oil analysis laboratory. When AOAP
or dusty conditions. Lubricate daily under severe
laboratory support is not available, change oil and
operating condtions.
filter element(s) at prescribed hardtime intervals,
3,000 mi (4 800 km) or 6 months, whichever occurs
first.
6 CRANES AND WINCHES.
(2) Transmission oil will be sampled every 90
a. Lubricate outrigger bottom plate, boom wear
days or 1,000 mi (1 600 km), whichever occurs first.
pads, and exposed rotation gears more often when
Reserve and National Guard units will sample every
cranes are operated in sandy or dusty conditions.
180 days or 1,000 mi (1 600 km), whichever occurs
first. Transmission oil will be changed only when di-
rected by an oil analysis laboratory. When AOAP
hours of winch operation.
laboratory support is not available, change oil each
6,000 mi (9 600 km) or 12 months, whichever oc-
c. To check and fill self-recovery winch, plug
curs first.
must be in upper position. To drain self-recovery
winch, plug must be in lower position.
(3) Transmission filter(s) shall be serviced/
cleaned/changed, as applicable, when they are
d. Heavy-duty winch is lubricated by the hydrau-
known to be contaminated, clogged or service is
lic oil and needs no further lubrication.
recommended by AOAP laboratory analysis or at
e. Lubricate after high-pressure wash.
prescribed hardtime intervals of 6,000 mi (9 600
km) or 12 months, whichever occurs first. When oil
f. Remove grease at first service interval. Lubri-
samples are rejected and the AOAP recommends
cate with paste wax.
changing lubricant and filter(s), the hardtime filter
service clock restarts at "0".
6 AXLE DIFFERENTIALS AND POWER
DIVIDERS.
(4) Hydraulic reservoir oil will be sampled ev-
ery 12 months. Oil will be changed only when di-
a. Change lubricant in new or rebuilt axles within
rected by an oil analysis laboratory. When AOAP
1,000 mi (1 600 km) but no sooner than 500 mi (800
laboratory support is not available, change oil every
km). Following initial drain, change lubricant every
6,000 mi (9600 km) or 12 months, whichever occurs
20,000 mi (32 000 km) or each 2 years of service,
first.
whichever comes first. During all lubricant changes,
(5) Hydraulic filter(s) shall be serviced/
remove metal particles from magnetic drain and fill-
cleaned/changed, as applicable, when they are
er plugs.
known to be contaminated, clogged or service is
LO 9-2320-279-12
CARD 34 OF 35
PIN: 063218--001
