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Section VII. RADIO INTERFERENCE SUPPRESSION - TM-10-3930-631-120033
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TM-10-3930-631-12 Truck Lift Fork EMD Solid Rubber Tired Wheels 4 000 Lbs Capacity 144 and 180 In Lift Army Model MHE 227 Manual
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Figure 4-3. Hourmeter and switches, removal and installation.
TM 10-3930-631-12
Section VIII. ELECTRICAL SYSTEM
The main power fuse is 400 amps. Fuses rated at 15
4-20. General
amps protect the key switch, horn, lights and contactor
a. Refer to figure 1-3 for a schematic diagram of
circuits. The power steering motor circuit has a 35 amp
the electrical system.
fuse.  A 400 amp fuse protects the hydraulic pump
b. The main components of the electrical system
circuit.
are the battery, which supplies the electrical power; the
CAUTION
controls, which control and distribute the power; the
instruments and the electric motors, which convert the
Before performing any electrical repairs
electrical energy into mechanical energy.  The motors
on  the  truck,  disconnect  battery
power the drive axle and hydraulic pumps.
receptacle  (fig.  2-2).
Discharge
c.  Operational controls consist of a directional
capacitors by turning key switch on and
control and a speed control. The forward and reverse
depressing horn button.
lever allows the operator to select the direction of travel.
Speed control of the truck is maintained through a foot
4-21. Hourmeter and Switches
pedal or accelerator.
a. Removal. Remove sheet metal cover to gain
d. A key switch on the instrument panel opens and
access to hourmeter and switches. Refer to figure 4-3
closes the circuits to operate the truck. An hourmeter
and remove the hourmeter and switches.
installed on the instrument panel records elapsed
b.  Installation.  Refer to figure 4-3 and install
running time of the truck drive and hydraulic pump
hourmeter and switches.
motors.
e. All circuits on the truck are protected by fuses.
4-8

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