TM-9-2350-311-34-1
HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS: HOWITZER, MEDIUM, SELF-PROPELLED, 155MM
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
SEPTEMBER 1994
TM-9-2350-311-34-1 - Page 35 of 352
TM 9-2350-311-34-1
During disassembly, tag critical parts such as shims, bearings, and electrical wiring harnesses and leads to make as-
sembly procedures easier. Tagging is important for electrical equipment if circuit number tags are illegible or missing.
CAUTION
Never scribe-mark bearing surfaces
Mark gears on mating teeth with scribe marks, dye, permanent ink, or paint to ensure correct positioning during
assembly. Chalk or crayon markings should be avoided because they are not permanent.
During assembly, subassemblies should be assembled first, combined into major components where possible, and then
installed to form a complete component.
Records to provide repair and replacement data and statistics should be carefully prepared and maintained in
accordance with DA PAM 738-750.
2-8 REPLACEMENT OF PARTS
Unserviceable or nonrepairable assemblies will be broken down into items of issue. Serviceable parts will be returned
to stock. Parts or assemblies that can not be repaired or reconditioned will be salvaged. Use new parts to replace them.
When assembling components and assemblies, replace damaged keys with new ones. If screws, washers, or nuts are
damaged, they must be replaced. Gaskets, packings, bushings, preformed packings, seals, Iockwashers, locknuts,
Iockrings, self-locking fasteners (screws, nuts, etc), cotter pins, and spring pins must be replaced if removed. Springs
must be replaced if broken, kinked, cracked, or do not conform to standards specified in the repair data.
If a required part is not available, reconditioning the existing part will be necessary. Such parts should be inspected after
reconditioning to determine suitability and probable service life. Replacement parts should be requisitioned immediately.
2-7 BALL AND ROLLER BEARINGS
Refer to TM 9-214, Inspection, Care, and Maintenance of Anti-Friction Bearings, for cleaning, inspection, and lubrication
of bearings and instructions for evacuation of bearing life.
2-8 REMOVING BURRS, SCRATCHES, AND RAISED METAL
WARNING
Dry-cleaning solvent (P-D-880) is toxic and flammable. Wear protective goggles and
gloves and use only in a well-ventilated area. Avoid contact with skin, eyes, and
clothes. Do not breath vapors. Do not use near open frame or excessive heat. The
flashpoint for type #1 is 100°F (38°C), and for type #2 is 138°F (59°C). if you become
dizzy while using dry-cleaning solvent, get fresh air immediately and obtain medical
aid. if contact with eyes is made, wash your eyes with water and obtain medical aid
immediately.
2-3
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