Filling with oil:
Opening aid - Internal hydraulic cordless screwdriver unit
Chapter 04: Assembling the opening aids
The internal hydraulic cordless screwdriver unit is partly pre-assembled and
supplied together with the cover. The unit assembly remains to be filled using
the oil supplied (see illustration bottom left), and the cylinder and connecting
hoses may also need to be installed on site.
1. First, the mounting bracket with the pre-mounted nuts and washers is screwed
to the frame on the hinge side.
The bracket must be self-supporting to the back against the concrete!
2. The cylinder is attached at the bottom to the frame bracket and to the
attachment point on the lid (using screws, nuts and spacer tubes).
Only tighten the nuts to a point where the screws can still be rotated!
3. Attach hose1 as shown in the illustration below to the cylinder and quick-
release unit, and hose 2 to the cylinder and hydraulic unit connection.
4. Next, the pump must be rotated in a clockwise direction or operated using a
cordless screwdriver until the cylinder has filled completely with oil and the air
has escaped from the system.
Note: Covers equipped with internal hydraulics may have additional hydraulic
cylinders or gas-pressurised springs, depending on the size. These are needed
for even opening and as protection against overloading the hydraulic system in
the event of heavy lid weights.
The gas-pressurised springs are installed as described on page 5.
Please also note the chapter on use when installing the shaft cover!
Tube 1
Tube 2
Connection unit
Connection
unit
Loosen screws
Status: 10-2021
Page 8 of 16
