ENGINE MAINTENANCE - TM-10-3930-638-24-P0530

TM 10-3930-638-24&P

3-5. ENGINE MAINTENANCE

a. Engine Tune-up.

(1) Locating Top Dead Center.

This task covers locating top dead center position for No. 1 cylinder.

INITIAL SETUP

EQUIPMENT CONDITION

TOOLS

Paragraph

Condition Description

Automotive Mechanic's

NSN 5180-00-754-0641

Vehicle parked on level surface, engine

Tool Kit

off, and parking brake applied.

2-53c

Left side panel removed.

MATERIALS/ PARTS

3-5h

Flywheel housing timing hole cover open.

None

3-5i

Rocker arm cover removed.

ITEM

ACTION

REMARKS

STEP

LOCATION

Engage flywheel ring gear teeth with blade

Rotate clockwise

Flywheel housing, a. Engine flywheel

left side engine

of screwdriver as shown. Rotate engine

until pointer in timing hole is in line with

compartment

TDC mark on flywheel

Check for

If push rods are loose, engine is at TDC

b. Push rods for No. 1

looseness

position for No. 1 cylinder. If push rods

cylinder

are not loose, rotate engine one complete

revolution from position in step a above,

and recheck push rods of No. 1 cylinder

for looseness

Cylinder head,

engine compart-

ment top

NOTE

Perform the following-steps only if accuracy of flywheel timing

pointer is in doubt.

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