TM-9-2320-285-24-1
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-9-2320-285-24-1 - Page 863 of 987
TM 9-2320-285-24-1
2-73.
HEATERS MAINTENANCE (CONT)
e.
Coolant Heater and Pump (cont).
STEP
LOCATION
ITEM
ACTION
REMARKS
REMOVAL (cont)
3
(cont)
NOTE
Tag and identify all wires before disconnecting and removing.
f.
3-wire cords
Tag wires
(6 and 7)
g.
Three wire nuts
Remove
(5)
h.
Wire ends of
Separate
Untwist
3-wire cords
(6 and 7)
4
Front
a.
Two locknuts
Remove
Support coolant heater and
engine
(10)
pump assembly
mount
b.
Heater support
Remove
As an assembly
bracket (12)
with heater,
pump, hoses,
and wires
c.
Two capscrews
Remove
Only if necessary for
(11)
replacement
5
Front
Plastic tubing
Remove, if
Para 2-73f
bumper
(67) and 3-wire
necessary
cord (7)
DISASSEMBLY
6
Heater
a.
Clamp (13)
Loosen
assembly
b.
Hose (3)
Disconnect
(35) and
c.
Clamp (13)
Remove
From hose (3)
pump (31)
d.
Clamp (15)
Loosen
e.
Hose (14)
Disconnect
f.
Clamp (15)
Remove
From hose (14)
g.
Clamp (16)
Loosen
h.
Hose (14)
Disconnect
From fitting (25)
i.
Clamp (16)
Remove
From hose (14)
j.
Clamp (17)
Loosen
k.
Hose (1)
Disconnect
From fitting (18)
l.
Clamp (17)
Remove
From hose (1)
m.
Fitting (18)
Remove
n.
Reducer bushing
Remove
(19)
2-840
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