TM 5-3895-373-20
CHAPTER 6
COOLING SYSTEM MAINTENANCE
Para
Page
General Maintenance Procedures............................................................................................ 6.1
6-1
Remove, Test, and Install Thermostat ..................................................................................... 6.3
6-8
Replace Coolant Hoses............................................................................................................ 6.4
6-10
Replace Fan Belt...................................................................................................................... 6.7
6-19
Replace Radiator Fan............................................................................................................... 6.6
6-17
Replace Radiator and Radiator Shroud.................................................................................... 6.2
6-2
Replace Water Pump ............................................................................................................... 6.5
6-12
6.1.
GENERAL MAINTENANCE PROCEDURES.
All unit level maintenance shall be performed in
accordance with good and safe shop practices. Observe
the following general instructions and requirements when
performing cooling system maintenance.
a.
Thread locking compound is used with
most threaded fasteners. If a threaded
fastener
will
not
break
loose,
heat
threaded area of fastener from 500° to
600°F (232° to 315°C) with heater gun. If
the special solvent used to remove thread
locking compound from screw threads
fails to remove buildup, discard fastener.
b.
Always tag mating connectors and fittings
before disconnecting. Tagging of mating
connectors
and
fittings
will
ease
reassembly and reduce assembly errors.
c.
Discard all removed gaskets, seals,
preformed packings, self-locking nuts,
lockwashers, spring pins, and deformed
hardware.
d.
Inspect all removed components for
obvious wear or damage. Replace all
worn, bent, broken, or otherwise damaged
parts. Test leaky radiator in accordance
with procedures in TM 750-254.
e.
Inspect all removed fasteners for thread
damage. If thread damage is found,
replace fastener. Replace flat washers if
galled or bent. Use screw extractor set
(Item 15, Appendix E) to remove broken
studs or screws.
f.
Clean painted surfaces thoroughly before
repainting. Do not paint over rust or
corrosion. Reference TM 430139 for
equipment painting requirements.
g.
Torque values cited in the text apply to
modified SAE Grade 8 fasteners at
required clamping loads.
h.
Use only authorized replacement parts.
Refer to TM 5389537324P, Repair Parts
and Special Tools List (RPSTL) for
authorized replacement parts.
i.
Observe all warnings and cautions. Wear
protective clothing and equipment as
specified. Observe the Safety and Hazard
Warnings provided in TACOM technical
bulletin TB 43-0216.
6-1