20 3 - Maintenance instructions
COROB
TM
D300
3.7 Maintenance of the hydraulic lift unit
The hydraulic lift unit is composed of a pump, hydraulic cylinder and a hose between these two. If
the pump or cylinder requires maintenance, they must both be removed at the same time.
3.7.1 Changing the hydraulic lift unit
In normal use, small amounts of oil may exit through the rod of the cylinder or pump. If a lot of oil
exits, it indicates that the seals are broken and the entire unit must be changed.
NOTE!: The filter in the breather hole of the pump is replaced with a plug during transportation.
Replace this plug with a filter before implementation.
The following instruction tells you how you can replace a leaking lift unit with a new one.
Tools required:
• 8 and 17 mm set wrench
• 4 mm Allen key
3.7.1.1 REMOVING THE HYDRAULIC LIFT UNIT
Procedure:
1. Switch off the COROB
TM
D300 and unplug the mains cable from the outlet.
2. Remove the hydraulic can table, see “3.2 Removing the can table during service”.
3. Remove the cover behind the table (six screws: four in upper part and one on both sides
below).
4. Remove the cover from top of the can table.
5. Remove the back cover behind the can table as follows:
- Remove the plastic cover from top of the table.
It is attached with four reclosable fasteners.
- Open the screw in top of the back cover.
- Bend the upper part forward and lift the lower part behind the can table, see figure 40.
Figure 38: The parts of the
hydraulic lift unit (V45142) are: 1
pump, 2 hose and 3 cylinder.
Figure 39: The hydraulic lift
unit in position in the can table.
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