LO-9-2320-279-12

M977 SERIES, 8X8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)

LUBRICATION ORDER

DECEMBER 1998
LO-9-2320-279-12

  LO-9-2320-279-12 - Page 34 of 37

NOTES
recommended by AOAP laboratory analysis or at
f.
After expiration of warranty, active Army units
prescribed hardtime intervals of 400 hours or 6
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-
oratory for analysis every 100 hours of operation or
(6) The top trunnion bearing should be given
180 days, whichever occurs first.
10-12 strokes with a grease gun through existing
grease fitting.
g.
Intervals for sampling as well as draining and
refilling lubricants may be changed by an AOAP
(7) The plug below the trunnion bearing
laboratory.
(Views AB and AC) should temporarily be removed
and a grease fitting installed. The lower trunnion
h.
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
km) or every 6 months, whichever comes first, and
grease gun. The fitting should then be removed and
the plug reinstalled.
drain and refill transmission oil every 6,000 mi (9
700 km) or annually, whichever comes first. Drain
i. Hydreulic Oil Reservoir.
and refill hydraulic reservoir every 6,000 mi (9 700
To drain oil reservoir, remove bottom drain plug
km) or annually, whichever comes first.
(See TM 9-2320-279-20).
(1) Crankcase oil will be changed only when
4. FIFTH WHEEL.
Clean and recoat the parts
directed by an oil analysis laboratory. When AOAP
more often when the vehicle is operated in sandy
laboratory support is not available, change oil and
or dusty conditions. Lubricate daily under severe
filter element(s) at prescribed hardtime intervals,
operating condtions.
3,000 mi (4 800 km) or 6 months, whichever occurs
first.
5. CRANES AND WINCHES.
(2) Transmission oil will be sampled every 90
days or 1,000 mi (1 600 km), whichever occurs first.
a.
Lubricate outrigger bottom plate, boom wear
Reserve and National Guard units will sample every
pads, and exposed rotation gears more often when
180 days or 1,000 mi (1 600 km), whichever occurs
cranes are operated in sandy or dusty conditions.
first. Transmission oil will be changed only when di-
b.
Change oil in winch gearbox after the first 10
rected by an oil analysis laboratory. When AOAP
laboratory support is not available, change oil each
hours of
winch
operation.
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
(3) Transmission filter(s) shall be serviced/
winch, plug must be in lower position.
cleaned/changed, as applicable, when they are
d.
Heavy-duty winch is lubricated by the hydrau-
known to be contaminated, clogged or service is
lit oil and needs no further lubrication.
recommended by AOAP laboratory analysis or at
prescribed hardtime intervals of 6,000 mi (9 600
e.
Lubricate after high-pressure wash.
km) or 12 months, whichever occurs first. When oil
samples are rejected and the AOAP recommends
f.
Remove grease at first service interval. Lubri-
changing lubricant and filter(s), the hardtime filter
cate with paste wax.
service clock restarts at “0”.
6. AXLE DIFFERENTIALS AND POWER
(4) Hydraulic reservoir oil will be sampled ev-
DIVIDERS.
ery 12 months. Oil will be changed only when di-
rected by an oil analysis laboratory. When AOAP
a.
Change lubricant in new or rebuilt axles within
laboratory support is not available, change oil every
1,000 mi (1609 km) but no sooner than 500 mi (800
6,000 mi (9600 km) or 12 months, whichever occurs
km). Following initial drain, change lubricant every
first.
20,000 mi (32 000 km) or each 2 years of service,
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 36


Back to Top