Setting the venting screw

The non-return valve is equipped with a venting screw. The non-return valve can be opened via the venting screw for inspection. As a result, the remaining fluid can flow back into the collection tank from the discharge pipe. Restore the factory setting of the venting screw to ensure proper operation of the non-return valve.

3

Collection tank ventilation connection

4

Discharge port

9

Venting screw

  1. Lifting unit in standby mode.
  1. Check factory setting of the venting screw: 28 mm (1.1 in)
  2. Unscrew the venting screw if it is screwed in too far (> 28 mm/1.1 in).

CAUTION! If the venting screw is screwed in too far, this causes damage to the non-return valve. This also leads to loud noises!

Position of the venting screw
Position of the venting screw