TM-9-2520-272-40

TM 9-2520-272-40

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INSPECTION

General Inspection

NOTE

Mandatory Replacement Parts (MRP) need not be inspected.

All non-MRP 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.

Castings and Machined Surfaces

1. 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.

2. Look at mounting surfaces on housings, valve bodies, and covers for nicks, scratches, or scoring. Remove

minor defects with crocus cloth or whetstone.

3. Look at threaded holes for damaged threads. Repair damaged threads with correct side tap or by replacing

threaded insert. Screw new inserts into the housing one turn below the surface. Refer to TM 9-243 for use

of taps and dies.

4. Look at oil passages for obstructions or dirt. Reclean passages if necessary.

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