Hydraulic System 87
temperature
To inspect the hydraulic oil color:
1. Make sure the MINIMAX™ is parked in a safe area for maintenance.
2. Turn ON the engine and then the hydraulic system.
3. Return all hydraulic devices to their “home” position (retract the packer, close the tailgate, etc.).
NOTE: The “home” position is where there is little or no hydraulic oil in the cylinders, which are
completely retracted. Most of the oil has flowed back into the tank.
4. Turn OFF the engine.
5. Use a folding stepladder to gain visual access to the oil gauge located on the hydraulic tank.
6. Inspect the oil through the gauge.
It is recommended to have the hydraulic fluid tested and analyzed by a lab to prevent hydraulic
system or pump breakdown. This will also optimize the frequency of hydraulic fluid changes.
NOTE: Evidence of maintenance and/or fluid samples could be requested when filing warranty claims
concerning the hydraulic system or pump.
Introducing the Dual Vane Pump
MINIMAX™ vehicles equipped with an automated arm features a dual vane pump. This pump is fitted
to the rear of the PTO drive shaft and is activated by an electric solenoid coil, which is mounted on
the hotshift PTO (see Figure 5-2). The electrical signal that activates the coil is sent by the P
UMP
switch on the control panel.
Figure 5-2
Hydraulic pump (left), electric solenoid coil (right)
MINIMAX™ vehicles may be equipped with a mechanical/electric dump valve. On units not equipped
with a dump valve, the hydraulic flow is instead controlled by modulated electrical signals produced
by the multiplexed control system. This sophisticated system makes dump valves unnecessary.
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