RUMBLE HOG RH7500, Operation Manual

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Section 2 - Rumble Hog Systems
Hydraulic Accumulators
Two accumulator tanks with gas charged pistons
provide reserve hydraulic power and compensate
for normal pressure variations in the cutter and skip
cylinder hydraulic circuits. They are located near the
high pressure filters below the deck access plate.
The gas charged pistons inside the accumulator
tanks Maintain hydraulic pressure up to 1500 psi
(104 Bar) in the hydraulic circuit when the engine
and hydraulic pumps are shutdown. Charge pres-
sure is specific to each accumulator and is marked
on the housing. Always make sure to follow proper
procedure to bleed pressure from the accumulators
and hydraulic circuits before servicing the system.
WARNING
A LWAY S D E P R E S S U R I Z E T H E H Y D R A U L I C S Y S T E M
(HYDRAULIC HOSES AND ACCUMULATORS) BEFORE
REMOVING ANY HYDRAULIC COMPONENTS, HOSES OR
FITTINGS. FAILURE TO DO SO COULD RESULT IN SERIOUS
INJURY OR DEATH
Hydraulic System Filters
Clean hydraulic fluid that has not been exposed to
excessive temperature or become contaminated
is essential to the performance of the system.
As pumps, cylinders and components wear, they
release tiny metal and rubber particles into the
hydraulic fluid. These particles act as a grinding
compound as they flow through the system. Or -
dinary dirt and water are common hydraulic fluid
contaminants. Any one of these will contribute to
premature failure of hydraulic components. Filters
on the low and high pressure hydraulic circuits
remove these contaminates and increase the life
of the fluid and hydraulic components.
Low Pressure Filters
The filters are spin on type filters located near the
top of the reservoir tank in the low pressure fluid
return circuit. All return fluid passes through the
filters as it flows back into the tank. The filters
should be changed at the same time the hydrau-
lic fluid is changed or if they begin to restrict the
return flow.
A pressure gauge near the filters monitors return
fluid pressure which provides an indication of when
the filter elements are becoming clogged and must
be changed. The elements should also be changed
when the hydraulic oil is changed.
Hydraulic System Low Pressure Filters & Pressure Gauge
Hydraulic Accumulators