24
HYDRAULIC SYSTEM
The auxiliary hydraulic system is an open type
directly mounted behind the heavy duty variable
displacement pump and right side of engine. The
systems consists of two dual gear pumps that sup-
ply the required hydraulics to operate the full time
power steering unit, boom control cylinders (lift,
level, fold), tread adjust, ladder outer boom breaka-
way and the solution pump.
After supplying each of these systems, the
hydraulic oil is sent to the oil cooler at the rear of
the engine compartment. Here it is cooled and then
sent back to the hydraulic oil reservoir.
DO NOT GO NEAR LEAKS. High pressure oil easily punctures skin causing
injury, gangrene, or death. If injured, seek emergency medical help.
Immediate surgery is required to remove oil. Do not use finger or skin to
check for leaks. Lower load or relieve hydraulic pressure before loosening
fittings.
NOTE:
Immediately shut down engine if
low level hydraulic oil light comes
on in cab (fig. 4.08).
IV.
OPERATING INFORMATION
FIG 4.08
Summary of Contents for STS12
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