Hydraulic System
257
In a hot shift system, the pump is declutched when the PTO is disengaged. In that configuration,
there is no coil on the dump valve. The dump valve will regulate the hydraulic flow to 45 GPM. The
pump (PTO) switch found on the in-cab control panel controls the clutch engagement.
Single Vane Pump
E
XPERT
™ vehicles with no automated loading arm are equipped with a single vane pump (see Figure
1). This pump is usually front-mounted and is activated by an electric solenoid valve. The electrical
signal that activates the solenoid is sent by the pump switch on the control panel.
Figure 5
-
1 Single vane pump
The single vane pump powers all body functions (tailgate, body hoist, and packer) through the
directional control valve (see
on page 258). It is capable of delivering a flow
of 20 gallons per minute (gpm) at 700 RPM. A dump valve located on the chassis (see Figure 5
2)
limits the flow to the valve to 45 GPM. All excess flow is sent back to the hydraulic tank. When the
pump is turned off, the oil returns to the hydraulic tank.
Figure 5
-
2 Chassis-mounted dump valve
Summary of Contents for EXPERT
Page 1: ...EXPERT TM MAINTENANCE MANUAL...
Page 2: ......
Page 3: ...EXPERT MAINTENANCE MANUAL...
Page 10: ...viii Table of Contents...
Page 18: ...8 Introduction...
Page 244: ...234 General Maintenance...
Page 251: ...Lubrication 241 Figure 4 11 Glass compartment lubrication chart optional...
Page 252: ...242 Lubrication Figure 4 12 EXPERT lubrication chart...
Page 264: ...254 Lubrication...
Page 320: ...310 Hydraulic System...
Page 357: ...Troubleshooting 349...
Page 358: ...350 Troubleshooting...
Page 386: ...378 Multiplexing...