Rocker Arm Assembly (cont) - TM-10-3930-638-24-P0570

TM 10-3930-638-24&P

3-5. ENGINE MAINTENANCE (cont)

j. Rocker Arm Assembly (cont).

ITEM

STEP

LOCATION

ACTION

REMARKS

CLEANING (cont)

WARNING

Wear safety glasses when drying parts with compressed air.

Failure to do so could cause serious injury to eyes and possible

blindness. If you hurt your eyes or if a foreign object is blown into

your eyes, seek medical attention immediately.

Use cleaning solvent P-D-680. Dry

All parts

Clean

thoroughly with compressed air

NOTE

Flush rocker arm shafts (12) and drilled bolt (1) to remove

residual material. Use compressed air to check oil holes for

obstruction.

INSPECTION/REPAIR

Inspect

Replace if worn, or if threads damaged

Drilled bolt (1), washers

(2) and cap screws (3)

Measure outside diameter with microm-

Rocker arm shafts (12)

Inspect

eter at worn spots on bottom of shaft.

Replace shaft if outer diameter is less

than 0.622 inch, or if shaft is corroded,

pitted, cracked or scored

Inspect

Install in spring tester. Check that force

Springs (8)

to compress spring to 1.75 inch is 7.5

to 8.5 pounds. Replace spring if required

force is not 7.5 to 8.5 pounds

Rocker arms (6 and 7)

Inspect

Use bore gage and check inside diameter.

Measure bore gage with micrometer.

and brackets (4, 5, 10

and 11)

Replace if inside diameter is greater than

0.626 inch, if pitted, scored or cracked, or

if rocker arm adjusting screw threads

damaged

Replace if bent (place rod on flat surface

Inspect

Eight push rods (13)

and roll over surface; rod should roll

smoothly indicating it is not bent),

cracked, pitted or excessively worn

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