Repair - TM-5-4930-233-140331

TM 5-4930-233-14

TM 4930-14/1

AIR COMPRESSOR ASSEMBLY

5-14. AIR COMPRESSOR - REPAIR - (Cont.)

Repair

WARNING

Clean all parts in a well ventilated area. Avoid inhaling solvent fumes and prolonged exposure of

the skin to cleaning solvent. Failure to do so can cause severe injury or death. Do not use near

flame or excessive heat. Flash point of solvent is 100 to 138 (38 to 59 ).

(1)

Clear all metal parts thoroughly with dry cleaning solvent.

(2)

Check piston fit. Pistons without rings should slide through the cylinder of their own weight and holding the

skirt of the piston with the two thumbs there should be no appreciable side motion at any point of piston

travel. Scored or out of round cylinders or pistons should be replaced.

(3)

Inspect all springs for loss of tension and set. Replace if defective.

(4)

Inspect bearings and bearing cups for wear, scoring or damage. Replace if defective.

(5)

Inspect cylinder for broken cooling fins and cracks. Replace if damaged.

(6)

Inspect crankshaft for cracks, scores and distortion. Replace if defective.

(7)

Inspect all parts for cracks, nicks, burns, wear or other damage. Replace, wrist pin must also be replaced.

NOTE

During assembly, check component fit as required by the procedure. Replace an item that is

found to be defective.

Assembly

(1)

Install two bearings (38 and 24) on crankshaft (53).

(2)

Press in two pin bearings (52) making sure that the small hole through casting lines up with oil hole in rod.

(3)

Install two bearing inserts (51), rod (50), rod cap (49), two lockwashers (48) and two screws (47). Torque

screws (47) to 25 ft lbs (33.9 N-m). Repeat for other rod.

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