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 13 of 624
TM 9-2320-283-34-1
Section II.
EQUIPMENT DESCRIPTION AND DATA
1-7.
EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES.
a.
General.
Specific capabilities, characteristics, and features of components for which maintenance is authorized
at Direct and General Support maintenance level are described in b through o below.
Additional descriptions and data
covering the M915A1 vehicle are given in TM 9-2320-283-10 and TM 9-2320-283-20.
b.
Engine.
Description of characteristics, capabilities, and features of the Cummins NIC-400 diesel engine can be
found in TM 9-2815-225-34&P.
c.
Fan Clutch.
The fan clutch is controlled by a temperature sensitive air valve installed in the engine block.
The
control valve directly senses coolant temperature.
Provided coolant temperature remains below the setting of the valve,
air passes through it to disengage the fan clutch.
When coolant temperature rises to the valve setting, it closes and
exhausts air pressure from the fan clutch which engages the fan.
TA230030
1-2
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