THEORY OF OPERATION - CONTINUED
ELECTRICAL SYSTEM - CONTINUED
Fuse Panel. Contains 12 fuses. Protects individual wiring circuits. Located behind instrument panel, accessible from
front of cab.
Main Circuit Breaker. Protects entire electrical system from overload. Ampere rated, located in the front bottom-right
corner of the operator compartment.
Disconnect Switch. Located between transmission control lever and right side of operator compartment, in front of
hydraulic control levers. Disconnects batteries from electrical system.
Air Dryer Heater. Located on air dryer at front of vehicle. Thermostatically controlled to maintain above-freezing tem-
peratures for evacuation of moisture from air system. The 60 watt, 24-volt DC heater and thermostat assembly has an
operating range between 50oF and 85oF.
Eight-speed, semi-automatic, power-shift.
Selection of Gears. Selection
is manual for all gears. Shifting
is automatic for third through eighth
gear. In reverse, first
and second gears, the flow of power is from the engine to the torque converter, to the transmission, to the differential
and on to the final drive. In third through eighth gears, the torque converter is coupled so power flows directly to the
Transmission Oil Quality. Oil can be checked with the sampling valve. This is located at the left rear of the transmis-
sion, next to the left brake actuator.
Foot-Operated Hold Control Valve. When engaged, prevents shifting up or down.
Foot-Operated Differential Lock Pedal. When engaged, prevents either wheel from slipping during travel on slippery