Hog Technologies PAINT HOG, Operation Manual

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Section 2 - Paint Hog Systems
2.6 Hydraulic System
Overview
The auxiliary engine that powers the air compres-
sor also powers the hydraulic pump. The system
includes a hydraulic manifold, reservoir tank and
a low pressure filter.
An oil cooler with a constant on fan cools the
hydraulic fluid during operation. Electric solenoid
valves activated by switches in the control switch
panels direct pressurized hydraulic fluid to the
various components. Hydraulic fluid level is moni -
tored by a sight gauge on the side of the reservoir.
The fluid level should be maintained within the
upper level of the sight glass to ensure adequate
fluid for operation.
Hydraulic Circuit and Pumps
When activated by the auxiliary engine, the
hydraulic pump provides high pressure fluid to
hydraulically powered components. The circuit is
equipped with pressure relief valves that prevent
excessive pressure in the system. The maximum
operation pressure for the hydraulic system is
3000 psi (207 BAR).
Reservoir
A reservoir tank mounted on top of the air com-
pressor provides hydraulic fluid for the system.
The pump circulates fluid through the manifold,
motors, cylinders and other components, then
back to the tank. A low pressure filter in the return
line cleans the fluid as it flows back into the tank.
Hydraulic fluid should be changed and the tank
flushed on a regular schedule as recommended
by Hog Technologies and hydraulic component
manufacturers.
Hydraulic Filter
Clean hydraulic fluid that has not been exposed to
excessive temperature or become contaminated
is essential to the performance of the system. As
the pump, 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. The
filter on the low pressure hydraulic circuit removes
these contaminates and increases the life of the
fluid and hydraulic components.
Hydraulic Reservoir, Sight Gauge & Filter
The low pressure filter is a cartridge type filter. All
return fluid passes through the filter as it flows
back into the tank. It is equipped with an indicator
that alerts the operator when the filter is dirty and
requires changing. The filter should be replaced at
the same time the fluid is changed, if it begins to
restrict fluid flow or at regular intervals as indicated
by the Service Matrix in the Routine Maintenance
chapter.
Hydraulic Manifold
Sectional valves mounted on the manifold below
the air compressor make up the hydraulic control
manifold system. An electric solenoid in each valve,
activated by switches in the control panels, direct
hydraulic pressure to components. The solenoid
valves are a cartridge type design that are easily
replaced in the event of a failure.
Hydraulic Motors
The paint tank mixers are powered by hydraulic
motors. Internal components of the motors are
lubricated and cooled by the hydraulic fluid. An
adjustable needle valve next to each mixer motor
is used to raise or lower mixer speed. The valve
adjustment knobs have reference numbers to make
adjustment easier. Mixer motors have maximum
pressure ratings and RPM settings that should
never be exceeded.