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CENTER SUPPORT MAINTENANCE - continued - TM-9-2320-386-24-1-20614
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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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CENTER SUPPORT MAINTENANCE - continued - TM-9-2320-386-24-1-20616
TM 9-2320-386-24-1-2
0378 00
CENTER SUPPORT MAINTENANCE (Contd)
DISASSEMBLY
NOTE
Second and third clutch pistons are removed the same way. Step 1
is for the second clutch piston. Repeat step 1 to remove other
piston.
Second and third clutch pistons are disassembled the same way.
Steps 2 and 3 are for the second clutch piston. Repeat steps 2 and
3 to disassemble other piston.
1. Hold center support assembly (1) over wood block with piston assembly (2) facing down and tap
center support assembly (1) down on block until piston assembly (2) is removed from center support
housing (3).
2. Cut four retainer washers (4) from piston (7) and remove spring retainer (5) and twelve springs (6)
from piston (7). Discard retainer washers (4).
3. Remove inner seal (8) and outer seal (9) from piston (7). Discard seals (8) and (9).
4. Remove two hook-type seal rings (10) from center support housing (3). Discard seal rings (10).
CLEANING AND INSPECTION
WARNING
Volatile mineral spirits burn easily and fumes can explode. Do not
smoke or allow flames nearby when using volatile mineral spirits.
Failure to do so may cause serious injury or death to personnel.
1. All metallic parts should be cleaned thoroughly with mineral spirits and dried with a lint-free rag.
2. Inspect center support housing (3) for wear, scratches, grooves, and burrs. Remove minor scratches
and burrs with crocus cloth. Replace center support housing (3) if worn, grooved, or excessively
scratched and burred.
3. Inspect bushing in center support housing (3) for scores, burrs, wear, and out-of-roundness. Remove
minor scores and burrs with crocus cloth. Replace center support housing (3) if scored, burred, worn,
or out-of-round.
4. Insert seal ring gauge in seal ring grooves of center support housing (3). Rotate seal ring gauge
360 degrees around center support housing (3). If seal ring gauge does not fit into grooves or rotate
freely, replace center support housing (3).
5. Inspect piston(s) (7) for scoring, breaks, burrs, scratches, broken pins, and grooves. Remove minor
scratches, scoring, and burrs with crocus cloth. Replace piston(s) (7) if pins are broken, scored,
burred, scratched, or grooved.
6. Inspect springs (6) for wear, discoloration, and damage. Springs (6) are painted green. If discolored,
replace spring(s) (6). Using spring tester, check spring(s) (6) for wear. Spring(s) (6) should have a
free length of 1.29 in. (32.8 mm) and have a spring load of 4.30-5.95 lb-ft (19.1-26.5 Nm) when
compressed 0.82 in. (20.8 mm). Replace spring(s) (6) if worn or damaged.
0378 00-4

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