probst TM-D-A Betriebsanleitung Seite 30

Operation
4.7 Valve tappet adjustment
The valve tappet (1) on the upper side of the suction plate (mounting
side of the control unit) is set to 17 mm at the factory and secured
with a lock nut.
This distance "A" (17 mm from the top edge of the screw to the
connection ring) must not be changed under any circumstances,
otherwise the valve flap of the control unit will not switch
correctly.
When using a hose cylinder extension SZV, the
height dimension "L" on the SZV must match the
setting dimension "l" of the ram () on the SZV (303
mm). →
Due to the built-in valve tappet (1), the valve flap (2) on the
control unit, which is used to set the floating state without load, is
completely opened when the suction plate is placed on a load.
This makes suction much easier. In addition, a considerable gain
in safety is achieved when lifting porous materials.
If the valve tappet often gets blocked on kerbs / slabs etc., it is also possible to work without the valve
tappet in exceptional cases (dismantle).
The prerequisite for this is airtight materials. However, this must be tested by the user in each
individual case.
52220015 / 52220015 -150 / 52220015-200 / 52220015-250 29 / 40 GB