1-12. SERVICE BRAKE SYSTEM (Cont).
f. Parking Brake. The parking brake mechanism is mounted on the front of the transmission. The actuating pedal
and release handle is located in the operators cab. A red light flashes and an audible alarm sounds if the parking brake is
applied while the engine is running and the transmission is In gear; a yellow light flashes if the parking brake is applied and
the transmission is in N (Neutral).
1-13. STEERING SYSTEM.
a. General. The steering system is a full-time power assist-type. A secondary electrically operated pump Is included
to provide emergency steering. The other components of the system are the steering valve, cylinders, and crossover relief
b. Steering Hydraulic Pump. The steering hydraulic pump supplies the steering system only. It is mounted on the
back of the transmission and is driven by the engine. It is a fixed displacement, external gear-type pump.
c. Secondary Steering Pump. The secondary steering pump is electrically powered. It operates when the key
switch is on and low steering system pressure Is sensed by a pressure switch.
1-14. FORKLIFT HYDRAULIC SYSTEM.
a. General. The forklift hydraulic system includes the service brake system, steering system, hydraulic reservoir, and
attachment components. The service brake and steering systems are described in paragraphs 1-12 and 1-13. The
attachment components consist of the attachment control valve, oil cooler, and two oil filters.
b. Hydraulic Reservoir. The hydraulic reservoir is a 20 gl (76 1) tank, located just ahead of the engine.
c. Attachment Control Valve. The attachment control valve controls the operation of the forks for boom raise and
lower, tilt, and spacing.
d. Oil Cooler. The oil cooler is mounted alongside the engine radiator and cools both the hydraulic system oil and the
transmission oil In separate sections.
e. OI Filters. There are two filters that are contained in the hydraulic system. The pump suction filter, located at the
hydraulic reservoir, filters larger contaminates and uses a washable screen. The return filter combines a bypass valve and
contains a replaceable cartridge-type filter. It filters contaminants entering the reservoir from the components of the
system. Should the return filter become clogged, a warning indicator will light and the bypass valve will open.
1-15. ELECTRICAL SYSTEM.
a. Charging System. The 24-volt charging system consists of the batteries and an alternator with an internal