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TM 9-2320-360-20-1
CAUTION
Hoses and nylon tubing that are kinked or chafed must be replaced. Hoses must
be secured and routed properly. Failure to comply may result in sudden,
unexpected hose failure.
f.
Tubing and Hose. Check all hose surfaces for broken or frayed fabric. Check for breaks caused by sharp kinks
or rubbing against other parts of the truck. Inspect hoses and lines for kinking. Inspect the fitting threads for damage.
g.
Electrical Parts. Inspect all wiring harnesses for chafed or burned insulation. Inspect all terminal connectors for
loose connections and broken parts.
CAUTION
Do not attempt to weld on HET Tractor without disconnecting all battery cables,
DDEC electronic control module, alternators, and CTIS system. Failure to comply
will damage electrical system.
h.
Metal Parts. Visually inspect all castings and weldments for cracks.
2-19. GENERAL REPAIR INSTRUCTIONS
a.
Nicks, Burrs, and Scratches. Remove nicks, burrs, and scratches from surfaces with crocus cloth.
b.
Exterior Parts. Chassis and exterior painted parts may be resurfaced where paint is damaged or where parts
have been repaired.
NOTE
Polished and machined steel parts not protected by cadmium, tin, copper, or other
plating or surface treatment must be free of moisture when protective coating is
applied.
c.
Protective Pans. Protect bare metal surfaces from rusting when not actually undergoing repair work. Dip parts
in, or spray them with, corrosion preventive compound. Aluminum parts may require protection in atmospheres having a
high salt content.
d.
Stud Installation. When installing studs in engine block and axle housings, use a driver designed for the stud to
be installed. A worn stud driver may damage the end thread and make it necessary to use a die before a nut can be
installed. This procedure will remove cadmium plating and allow corrosion, which will make future disassembly difficult
and cause stud to be backed out with nut. Before installing a stud, inspect hole for chips and liquid. Blow out any foreign
matter. Start stud by hand.
e.
Electrical Parts. Replace all broken, worn, or burned electrical wiring. Wires with several broken strands must
be replaced. Broken strands will increase the resistance of the wire and impair efficiency of electrical components,
especially the ignition system. Wire numbers must be permanently identified on any new wiring.
f.
Hoses. Replace all broken, frayed, crimped, or soft flexible lines and hoses. Replace stripped or damaged
fittings. Replace entire flexible hose if fittings are damaged. Hose clamps should not crimp hoses. Hose numbers must
be permanently identified on any new hoses.
g.
Fasteners. Replace any bolt, screw, nut, or fitting with damaged threads. Inspect tapped holes for thread
damage.
h.
Dents. Straighten minor body dents by tapping with a soft-faced hammer while using a wooden block for
backing.
i.
Sheet Metal Repair. Repair minor sheet metal cracks by installing patches.
2-987
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