TM-9-2350-311-34-2
CAB, ARMAMENT, SIGHTING AND FIRE CONTROL, ELEVATING AND TRAVERSING SYSTEMS AND ASSOCIATED COMPONENTS HOWITZER, MEDIUM, SELF-PROPELLED, 155MM
TECHNICAL MANUAL; DIRECT AND GENERAL SUPPORT MAINTENANCE MANUAL
SEPTEMBER 1994
TM-9-2350-311-34-2 - Page 65 of 552
TM 9-2350-311-34-2
NOTE
Make sure that identification markings on major assemblies correspond to those entered in weapon
record book.
2-4.1
General Inspection Guidelines
a. Inspect Cast Parts
Ensure there are no fractures and inspect interiors for scores and burrs.
b.
Inspect Pistons, Spools, and Sleeves
NOTE
Inspection of sleeves is to be accomplished without removing sleeves from valve bodies.
Instead, use a small mirror and pencil-type flashlight.
Spools and sleeves are non-interchangeable. If one part is rejected, also reject its mating part.
Ensure bores and parts are clean and free of foreign matter and burrs.
c. Inspect Bail Bearings
1
Inspect all bearings in accordance with TM 9-214, Inspection and Care of Bearings. This reference also pro
vides information on cleaning, lubrication, and evaluation of life of bearings.
2
Inspect ball check valves for cracks, fractures, signs of galling, pitting, or corrosion. Take several measure-
ments of the diameter of each ball to check for roundness and proper diameter. Replace ball if damaged.
3
Perform maintenance functions on bearings in accordance with TM 9-214.
d. Inspect Bushing-Type Bearings
Never scribe-mark bearing surfaces as it may cause permanent damage to parts.
NOTE
Observe position of defective bearing within housing in order to replace new bearing in a similar
manner.
Inspection of bearings is to be accomplished without removal of bearings. Instead, use a small
mirror and pencil-type flashlight.
1
Inspect bearing for cracks, fractures, and signs of galling, pitting, scoring, or corrosion.
2
Replace bearing if damaged,
e.
Do Not Inspect Seals, Gaskets, and Preformed Packings
Replace all seals, gaskets, and preformed packings.
f. Inspect Gears
1
Inspect gears for wear, nicks, flaking, scoring, and burring. Check gears that have been shrunk or pressed
with component parts.
2-3
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