TM-9-2320-283-34-1

TRUCK TRACTOR, LINE HAUL, 50,000 GVWR, 6X4, M915A1

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

DECEMBER 1983

TM-9-2320-283-34-1 - Page 151 of 624

TM 9-2320-283-34-1

COOLING SYSTEM.

3-18.

FAN CLUTCH REPAIR (Continued).

LOCATION/ITEM

ACTION

REMARKS

E.

ASSEMBLY

(Continued).

NOTE

Application of air pressure should push pulley and bearing assembly (15)

against pressure plate

(20).

This enables you to aline and install three

truss head screws (27).

29. Plate (20) and

a. Fasten to item (15).

Three items (27) should

three screws (27).

be new.

b. Torque three items (27) to

40 lb-in.

c. Disconnect air pressure.

F.

TESTING.

30. Plate (20) and

Measure gap dimension between

pulley (2).

pulley face line and edge of

pressure plate as follows.

a. With no air pressure

Gap should be 0.375

applied to item (6).

0.415 inches.

b. With 120 psi air

Gap should be a minimum

pressure applied.

of 0.576 inches.

31. Plate (20).

With item (1) held firmly,

rotate item (20).

a. With no air pressure

Torque to rotate should

applied it should be

not exceed 10 lb-in.

very difficult to turn.

b. With 70-120 psi air

Must rotate freely,

pressure applied to

separate from pulley.

item (6), it should

rotate easily.

NOTE

Follow-on maintenance action required:

Install fan clutch TM 9-2320-283-

20.

3-98