Cleaning Procedures. A degreasing machine may be used to remove heavy grease and oil from metal parts.
Removal and Disassembly of Components.
(1) Welding and brazing processes may be used to repair cracks in external parts, such as brackets, panels
and framework. Because of time required and the chance of subsequent failure, such repairs should be attempted only
when replacement parts are not available. Welding and brazing of castings and running parts or parts under great
stress will only be done in emergencies. Refer to TC 9-237 for proper welding and brazing procedures.
(2) Replace any screw, nut, or fitting with damaged threads. Inspect tapped holes for thread damage. If
cross-threading is evident, retap the hole for the next oversize screw or stud. If retapping will weaken the part, or
if the cost of the part makes retapping impractical, replace the part. Chasing the threads with proper size tap or die
may be adequate.
(3) Reshape elongated mounting holes to round and drill to receive bushing with required inner diameter.
Stake bushing in place with center punch.
Remove protective grease coatings from new parts before installation.
(5) To replace a preformed packing, first clean groove, then stretch packing and place into position. Place
component on flat surface and uniformly press packing into position.
(6) Coat oil seals evenly with oil or grease before installing. Install oil seals with seal lip facing in, applying
an even force to outer edge of seal. If oil seals are to be installed over keyed or splined shafts, use a guide to prevent
sharp edge of the keyway or splines from cutting the seal. Construct guides of very thin gauge sheet metal and shape to
the required diameter. Make certain guide edges are not sharp and are bent slightly inward so they do not cut the seal.
(7) Remove parts only if repair or replacement is required. Do not disassemble a component any further than
necessary to accomplish needed repairs.
g. Painting. Instructions for preparation of material for paint, how to paint and materials to be used are in
TM 43-0139. Instructions for camouflage painting are contained in FM 20-3. Stenciling and marking military
vehicles are called out in TB 43-0209. Data plates location and description are referenced in Chapter 2.
h. Lubrication. Refer to Para 4-8 for lubrication procedures and requirements for the trailer. The instructions
include types and grades of lubrications used, lube points, locations and frequency of required lubrication.
i. Installation. Put hoses, tubes, lines and, electrical wiring in place by matching identification tags, markings on
equipment and using illustrations presented. Use sealing compounds as required in each maintenance task. When
installing screws and nuts, be sure to tighten to values given.