Section III. CLEANING, INSPECTION, AND REPAIR OF ENGINE COMPONENTS AND ACCESSORIES

TM 9-2815-210-34-2-2

Make sure all oil passages are open. O p e n clogged passages with compressed

a i r or by working a stiff wire back and forth. Flush with solvent.

A f t e r cleaning, all parts should be covered or wrapped in plastic or paper to

p r o t e c t them from dust and dirt.

4-4. INSPECTION.

R e f e r to Inspection, Care, and Mainte-

C h e c k all bearing cones and cups.

n a n c e of Antifriction Bearings, TM 9-214.

S m a l l chips, burrs or scratches in castings that do not go into screw holes

or openings can be repaired.

C h e c k all mating flanges on housings and supports for warpage with a straight

e d g e or on a surface plate. C h e c k mating flanges for discoloring. Discoloring of

flanges will mean that oil has been leaking which may mean that flanges are warped.

C h e c k aluminum castings for cracks using penetrant kit. If dye penetrant

i n s p e c t i o n equipment is not available, use a magnifying glass and a strong light.

C h e c k all other type castings for cracks with magnetic particle inspection

e q u i p m e n t . I f magnetic particle inspection equipment is not available, use a magni-

f y i n g glass and a strong light.

NOTE

There are no wear limits on gear teeth. Good

judgement is needed to know if parts are good.

C h e c k all gears for cracks, worn teeth, and pitted surfaces.

C h e c k all threaded parts for worn or stripped threads.

4-5. REPAIR.

S m o o t h out any chips, burrs, or scratches on castings, gears, and shafts.

W e l d cracks and small holes in castings. Refer to TM 9-237.

D r i l l out any bolts or studs broken off in tapped holes.

D r i l l out threaded holes that are stripped or out-of-round to the next

l a r g e r size and retap them. W h e n putting engine together, use a bolt or stud the

s i z e of the newly tapped hole.

T e l l the machine shop to mill warped castings.

Section III. CLEANING, INSPECTION, AND REPAIR OF

ENGINE COMPONENTS AND ACCESSORIES

TOOLS:

V a l v e seat replacing tool, pn 11642007

E x h a u s t valve seat replacer, pn 11642006

Hand reamer, pn 12254220

A i r compressor pulley adjusting wrench, pn 10935288

F u e l passages cleaning brush, pn ST 876

Dry

cleaning solvent, type II (SD-2), Fed. Spec P-D-680

SUPPLIES:

Air

compressor unloader valve gasket

Air

compressor intake air cleaner gasket

Air

compressor air discharge manifold gasket

4-2