TM-9-2320-285-24-2
TRUCK TRACTOR, YARD TYPE, 43,500 LB GVW, DED, 4X2, ARMY MODEL M878A1
TECHNICAL MANUAL; ORGANIZATIONAL, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
OCTOBER 1985
TM-9-2320-285-24-2 - Page 227 of 698
TM 9-2320-285-24-2
3-25.
AIR COMPRESSOR ASSEMBLY MAINTENANCE
b. Air Compressor Assembly (cont).
STEP
LOCATION
ITEM
ACTION
REMARKS
INSPECTION (cont)
9
c. Check main
Install front bearing (20) on
(cont)
journal
, crankshaft (49), and press
bearing
crankshaft into bearing on
surface
rear end cover (36). Use
to bear-
thickness gage. Clearance
ings
must not exceed 0.0065
clearance
inch. Replace crankshaft
if clearance is excessive
j.
All other parts
Inspect
Replace if cracked, broken,
worn, or threads damaged
REASSEMBLY
10
Crankcase
a.
New oil seal
a. Lubricate
Use SAE 30 oil
(18) (45)
b.
Install
In front end cover (43)
b.
New gasket (44)
Position
On front end of crankcase
and two new (18)
sealing rings
(40)
c.
Front end cover
Position
On front end of crankcase
(43)
(18); align with scribe
marks on crankcase made
before disassembly
d.
Four lock
Install
Tighten to 15-18 pounds foot
washers (42)
torque
and screws
(41)
e.
Bearing (20)
a. Lubricate
Use high temperature cup
grease
b. Install
On front end of crankshaft
(49)
f.
Crankshaft (49)
Install
Align with scribe marks on
crankcase (18) made before
disassembly. Use arbor
press to install in
crankcase, making certain
not to damage oil seal (45)
g.
Two new sealing
a. Lubricate
Use SAE 30 oil
rings (37)
b. Install
Into grooves in rear of
crankcase (18)
h.
New gasket (38)
Position
i.
Thrust washer
Install
On crankshaft (49)
(39)
3-221
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