TM 5-3990-263-13&P
0038
REPAIR
GENERAL REPAIR INSTRUCTIONS
WARNING
Drilling and grinding operations are hazardous to the eyes. Eye protection is required. Failure
to comply may result in serious injury or death to personnel.
1.
Exterior Parts. Chassis and exterior painted parts may be resurfaced where paint is damaged, or where parts
have been repaired, by using an abrasive disc driven by a flexible shaft.
2.
Bearings. Remove residue and oil stain from bearing races with crocus cloth.
NOTE
Protective parts procedure is used with polished or machined steel parts not protected by
cadmium, tin, copper, or other plating or surface treatment. Bare metal surfaces must be free
of moisture when protective coating is applied.
3.
Protective Parts. During repair operations, protect bare steel surfaces from rusting when not actually
undergoing repair work. Dip parts in, or spray them with, corrosion preventive compound. Same protective
coating may be applied to other metal to prevent rust. Aluminum parts may require protection in regions having
a high salt-air content. Steel parts must always be protected.
4.
Electrical Parts. Replace all broken, worn, or burned electrical wiring. Wires with several broken strands shall
be replaced. Broken strands increase resistance of wire and impair efficiency of system.
5.
Hoses. Replace all broken, frayed, crimped, or soft flexible lines or hoses. Replace stripped or damaged
fittings. Replace entire flexible hose if fittings are damaged. Ensure hose clamps do not crimp hoses.
6.
Fasteners. Replace any bolt, screw, nut, or fitting with damaged threads. Inspect tapped holes for thread
damage. If cross-threading or galling is evident, re-tap holes for next oversize screw or stud. When re-tapping
will weaken part or when cost of a part makes re-tapping impractical, replace damaged part. Chasing threads
with proper size tap or die may often be enough.
7.
Sheet Metal Repair. Repair minor skin cracks by installing patches.
END OF TASK
ASSEMBLY
GENERAL ASSEMBLY INSTRUCTIONS
1.
Preparation. Remove grease from parts prior to installation.
2.
Packing Installation. Lubricate all packing with a thin coating of lubricating oil prior to installation. Slightly
stretch packing and place into position. Rotate component on flat surface or uniformly press packing into
position.
3.
Gaskets. To provide added sealing for gaskets, coat both sides with sealant. Remove all traces of previous
gasket and sealant before installing new gasket.
4.
Seal Rings. Coat seal rings with oil and carefully inset into their bores. If a seal ring must be installed over
threaded parts, temporarily wrap threads with tape to protect seal ring. Then remove tape.
0038-5
03/15/2011Rel(1.8)root(maintwp)wpno(M02176)
