SHOP MANUAL
HYDRAULIC
Ch 5 page 6 Ch 5 page 7
HYDRAULIC
The hydraulic system has two pumps.
The steering system, accumulators, tilting functions and the cooling fan functions are fed by hydraulic pump 1
(145ccm/rev.), driven by the engine.
The emergency sterring system is fed by the emergency steering pump (3) (maximum 50 l/min) which is driven
by the truck’s motion, either forwards or backwards.
The hydraulic system has three primary functions:
First primary function: supply the steering power and transmit the drivers steering motion from the steering
wheel to the steering cylinders (pump 1) and maintain safe the steering function also when the engine fails
(pump 3).
Second primary function: supply the brake accumulator with pressure in the accumulator chamber (pump 1)
and feed the cooling fan motor which provides sufficient fan speed to maintain the engine operating tempera-
ture within given limits (pump 1).
Third primary function: supply power to the tilting cylinders to manage unloading the dumper body (pump 1).
Hydraulic system main function.
1
2
3
Accumulator 3,0 litre
left hand side.
Accumulator 3,0 litre
right hand side.
Rear service brake
Accumulator 3,0 litre
right hand side
.
vice brake
Accumulator 1,0 litre
left hand side.
Park brake
Figure 2
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