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PISTONS AND CONNECTING RODS MAINTENANCE - continued - TM-9-2320-386-24-1-20514
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/.5ton/TM-9-2320-386-24-1-2 Extended Service Program (ESP) for 2-1/2-Ton 6x6 M44A3 Series Trucks (Diesel) Manual
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PISTONS AND CONNECTING RODS MAINTENANCE - continued - TM-9-2320-386-24-1-20516
TM 9-2320-386-24-1-2
0361 00
PISTONS AND CONNECTING RODS MAINTENANCE (Contd)
CLEANING AND INSPECTION
WARNING
Skysol-100 mixture is combustible. Use mechanical ventilation whenever
product is used in a confined space, is heated above ambient
temperatures, or is agitated. DO NOT use or store near heat, sparks,
flame, or other ignition sources. Keep container sealed when not in use.
Contact with Skysol-100 may cause skin irritation. Use chemical resistant
gloves. In case of skin contact, remove any contaminated clothing and
wash skin thoroughly with soap and water. Wash contaminated clothing
before reuse. Eye contact may cause irritation, tearing, or blurring of
vision. Use face shield or goggles when eye contact may occur. In case of
eye contact, flush eyes with large amounts of water for at least fifteen
(15) minutes or until irritation subsides. Inhalation may cause irritation
to upper respiratory passages. DO NOT have food or drink in the vicinity.
1.
Clean all piston and connecting rod parts with Skysol-100 and dry with lint-free cloth.
2.
Inspect connecting rod (5) for scratches or other damage more than .003 in (.076 mm). Replace
connecting rod (5), if damaged.
3.
Inspect screws (13) and nuts (18) for damaged threads. Replace screws (13) or nuts (18), if damaged.
4.
Inspect piston ring grooves (9) and (10) on piston (11) for nicks, burrs, or cracks. Replace piston (11),
if damaged.
5.
Inspect clearance between ring (3) and side of groove (9) of piston (11). Clearance should be 0.0015-
0.0031 in (0.038-0.079 mm). Replace piston (11) if out of tolerance.
ASSEMBLY
1.
Press new sleeve bearing (6) into connecting rod (5).
2.
Apply lubricant to piston pin (8) and install connecting rod (5) on piston (11) with piston pin (8) and
snaprings (4) and (7).
3.
Install new piston rings (1), (2), and (3) on piston (11).
4.
Rotate piston rings (1), (2), and (3) so end gaps are 120 apart.
INSTALLATION
NOTE
Piston is installed through top of cylinder block with connecting
arm first.
Each piston has the word "front" stamped on top. Install each
piston with the word "front" toward the front of the engine.
1.
Install upper sleeve bearing (14) on connecting rod (5).
2.
Install piston ring compressor on piston (11) and insert piston (11) into cylinder block (12) until
piston ring compressor is seated firmly against cylinder block (12).
CAUTION
Do not force piston into cylinder block. If piston does not move
freely into cylinder block, remove piston and check condition of
piston rings. Failure to comply may result in damage to
equipment.
0361 00-4

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