TM-9-2320-272-24-4

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 4 OF 4

JUNE 1998

TM-9-2320-272-24-4 - Page 382 of 836

TM 9-2320-272-24-4

5-56. LOW CLUTCH REMOVAL AND CLEARANCE (Contd)

c. Establishing Clearance

1.

2.

3.

4.

5.

6.

Starting with clutch plate (2), alternately install eight clutch plates (2) and seven clutch discs (3) in

adapter housing (1).

Measure distance from top edge of adapter housing (1) to top of clutch plate (2) with depth

micrometer. Record measurement.

Position new rear cover gasket (4) on rear cover (5).

Measure distance from top of edge of piston (6) to gasket (4) with depth micrometer. Record

measurement.

Subtract step 4 measurement from step 2 measurement. Record the difference. This measurement is

low clutch clearance.

Low clutch clearance, as determined in step 5, should be 0.073-0.141 in. (1.85-3.58 mm). If clutch

clearance exceeds 0.141 in. (3.58 mm), replace clutch plates (2) and discs (3) with new, thicker

plates (2) and discs (3).

7.

Remove eight clutch plates (2) and seven clutch discs (3) from adapter housing (1).

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