Refer to paragraph 3-8 for mandatory replacement parts.
All parts should be inspected when they are removed from the transmission.
Look for metal particle contamination.
This may appear as obvious metal particles, or
it may appear as dust-like metallic particles, even similar to small deposits of grayish
sludge. When this condition is found and it is determined that repair can make the
transmission serviceable, the-hydrostatic pump and motor assembly valve bodies and oil
pumps must all be replaced.
In addition, all parts must be cleaned and inspected.
Look for unusual wear or damage.
The condition of parts removed can identify a
problem within the transmission, often before the problem becomes obvious in operation.
Parts that are to go back in the transmission must be thoroughly inspected to determine
that they are satisfactory for continued use.
Parts must be clean enough to permit proper inspection.
Refer to paragraph 3-2 CLEANING.
Castinqs and Machined Surfaces Look at housings, covers, pistons, and castings for breaks
cracks, deep scoring, or excessive wear that should prevent continued use. Remove nicks,
burrs, or scratches with crocus cloth or whetstone.
Look at mounting surfaces on housings, valve bodies, and covers for nicks, scratches, or
scoring. Remove minor defects with crocus cloth or whetstone.
Look at threaded holes for damaged threads. Repair damaged threads with correct size tap or
by replacing threaded insert.
New inserts must be screwed into the housing one turn below the
surface. Refer to TM 9-243 for use of taps and dies.
Look at oil passages for obstructions or dirt. Reclean passages if necessary.
Roller, Ball and Sleeve Bearinqs.
Any bearing that has been subjected to metal contamination must be closely
inspected for metal particles. Metal particles will cause bearing failure.
Refer to TM 9-214 for inspection procedures applying to roller and ball bearings.
Look at sleeve bearings and bushings for scoring, burrs, sharp edges, or scuffing. Remove minor
scoring, sharp edges, or scuffing with crocus cloth Remove burrs with whetstone.