TM 9-4520-251-14
5-10 PISTON AND CONNECTING ROD ASSEMBLY
This task covers:
a. Removal
b. Inspection/Repair
c. Installation
Tools
Equipment Condition Para
Condition Description
Tool kit, service, refrigeration unit
4–23
Coupling removed.
(Appendix B, Section III, Item 1)
4–35
Flywheel removed.
Piston ring spreader
(Appendix B, Section III, Item 19)
Ring compressor
(Appendix B, Section Ill, Item 20,
Tool Kit 291661)
Materials/Parts
Engine oil (Appendix E, Item 8)
Standard piston
Standard ring set
Standard connecting rod and cap
Standard crankcase gasket
Cylinder head gasket
Location/Item
Action
Remarks
REMOVAL
1.
Crankcase
cover
2. Cylinder
3. Cap and dipper
Remove rust or burrs from power takeoff end of
crankshaft (2). Drain crankcase oil as described in
paragraph 4–7. Remove screws (21) and disassemble
crankcase cover (1) from engine block (4). If crankcase
cover sticks, tap lightly with soft hammer on alternate
sides near dowel. Remove crankcase gasket (15) and
discard.
Remove screws (11 and 12) and washers (13). Lift
off cylinder head (10). Discard cylinder head gasket (5).
Remove screws (19) and washers (20) and disassemble
dipper (18) and cap (17).
NOTE
Crankshaft (2) and cam gear (16) do not have to be removed.
4.
Piston and
Remove any carbon or ridge at top of cylinder bore.
connecting rod
Push piston (8) and connecting rod (3) out top of cylinder.
5. Pin locks
Take out pin locks (6 and 14) with thin nose pliers
and pin
and remove pin (7).
5-18
