Presentation
8 General
Electrical system
The electrical system is a 24VDC, negative-ground system. Pow-
er is supplied by two 12VDC batteries connected in series. Battery
charging is accomplished using a standard 75 amp alternator and
an optional 100 amp alternator. Electrical power can be discon-
nected using a ground isolation switch.
Clutch
A multiple wet disc clutch is mounted to the engine flywheel and
connected to the transmission with a driveshaft. The clutch must
be used when starting to move or when changing direction.
Transmission
The transmission has eight forward and four reverse speeds. It is
a fully sequential, direct drive, powershift unit utilizing a counter-
shaft design.
Final drive/tandems
Final drives are single reduction in models G710B to G746B and
double reduction in the G780B. Each has an operator controlled
lock/unlock differential. Rear axles are case hardened, full floating
design, supported on double row spherical roller bearings. Tan-
dem wheels are chain-driven.
Brakes
Hydraulically actuated, oil disc service brakes are located at the
four tandem drive wheels. The crossover dual braking circuits pro-
vide even braking on both sides of the grader.
If the engine stalls, or hydraulic boost pressure becomes unavail-
able, full braking capability is available through a reserve system.
An electric motor supplies the power required to bring the grader
to a safe stop.
The parking brake is a spring apply/hydraulic release, disc-type
brake. It is driveline-mounted to the transmission output shaft. An
accumulator in the circuit stores system pressure allowing the
brakes to remain released in the event of system pressure loss for
about 15 minutes.
Steering
The steering system is a closed-center dynamic signal load sens-
ing system. The hydraulic steering system incorporates two steer-
ing cylinders. The leaning wheel feature and articulated frame can
be used to decrease turning radius. There is no manual steering.
Cab and frame
Both the canopy and fully-enclosed cab are equipped according to
the ROPS standard. FOPS approved structures are optional. En-
closed cabs are also provided with air conditioning and/or heating
systems as options. All controls are housed in the fully adjustable
steering pedestal and the right-hand side console. Ergonomic
seating and hydraulic control lever placement ensure operator
comfort and efficiency. The frame articulates 22° to the left or to
the right and uses anti-drift lock valves to ensure stable operation.
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