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FAN CLUTCH AND FAN ACTUATOR (M939A2) MAINTENANCE
FAN DRIVE CLUTCH (M939/A1) REPLACEMENT

TM-9-2320-272-24-1 Truck 5-Ton 6x6 M939 M939A1 M939A2 Series Trucks (Diesel) Manual
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TM 9-2320-272-24-1
NOTE
All male threads must be wrapped with antiseize tape before
installation.
Assistant will support fan clutch during installation.
1.
Install fan clutch (11) on engine (8) with four washers (9) and screws (10).
2.
Install elbow (7) on fan clutch (11).
3.
Connect air line (5) to elbow (7).
4.
Wrap male pipe threads of actuator (3) with antiseize tape and install in radiator inlet tube (1).
5.
Install air line (6) and elbow (2) on actuator (3).
6.
Install air line (5) and elbow (4) on actuator (3).
FOLLOW-ON TASKS:
Fill cooling system to proper level (para. 3-53).
Install drivebelt (para. 3-71).
Install fan and fan shroud (para. 3-64).
Start engine (TM 9-2320-272-10), check for leaks, and tighten any loose fittings.
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