99Expert(t) 2000
TM
Maintenance Manual
HYDRAULIC VANE PUMP SYSTEMS
The Expert(t) 2000
TM
side loader is
offered with a vane-type hydraulic
pump. This high-efficiency pump can
be used at lower RPMs than gear
pumps, up to 1200 RPM. This results
in lower fuel consumption and less
noise, which increase the operator’s
safety. It also can achieve higher
pressure settings (3000 PSI).
The new vane pump (Figure 155.
“Vane pump”) is a constant drive pump
linked with the engine crank shaft. It
uses an electric solenoid dump valve
(Figure 156. “Dump valve”) to send the
hydraulic flow either to the system or
back to the tank when not in use. The
dump valve limits the flow to 45 gallons
per minutes.
Figure 155. Vane pump
Figure 156. Dump valve
The pump switch (PTO switch) found
on the console (Figure 157. “PTO
switch”) controls this dump valve.
Figure 157. PTO switch
Dump Valve
(located between the
dropped frame rails)
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