90 Hydraulic System
• Gripper section (open/close): not proportional, with load sensor relief
• Lifting arm section (extend/retract): proportional, no load sensor relief
• Lifting arm section (up/down): proportional, no load sensor relief
Inspecting the Pump
The hydraulic pump is powered by the vehicle engine through a drive shaft and a PTO. The pump
should be visually inspected every working day.
Figure 5-5
Pump
When inspecting the pump:
1. Start the engine and engage the hydraulic pump.
2. Check the pump turns freely without excessive noise or vibrations.
3. Turn OFF the pump and stop the engine.
4. Lock out and tag out the vehicle (see Locking Out and Tagging Out the Vehicle on page 20).
5. Check for oil leaks under the pump and at connection points.
6. If electrical problems occurred with the pump, see Pump on page 153.
Caution!
If the unit has to be driven away for repairs on the hydraulic system, remove the drive
shaft between the engine and the pump before restarting the engine.
Not required
on a unit equipped with a hot-shift PTO.
To Next Page
Loading...
Need help?
General
