Servicing
Diaphragm Pump UN035_I EX
26
Turn the counterweight J so that the connection rod K is in the
mid-position; fit the new diaphragm F.
For double-head pumps:
Undo the three screws that hold the fan cover (not shown) and
remove the fan cover from the motor. Turn the fan (not shown)
to bring the diaphragm F to top dead center; fit the new dia-
phragm F.
8. For all pumps except .9 versions: Place the retainer plate E on
the diaphragm F. If flathead screw D does not have thread-
locker(single-head versions), apply glue Delo
®
-ML 5249 or
equivalent to thread. Tighten the flathead screw D (torque: 5.0
Nm).
9. For pumps UN035_ _.9I EX: Place the retainer plate E on the
diaphragm F. Screw on the retainer plate E with the wrench for
retainer plate uniformly and diagonally (torque: 5.0 Nm).
10. Place the intermediate plate X on the top of the diaphragm F
so that it corresponds to the marks on the housing.
11. Place the new valve plate Z on the intermediate plate X.
12. Place the head plate head W on the diaphragm F according to
the marks made previously and tighten the screws Y uniformly
and diagonally (torque: 10.0 Nm).
13. For single-head pumps:
Turn the counterweight J to check that the pump runs freely,
replace the cover plate H and secure it with the four screws G.
For double-head pumps:
Turn the fan (not shown) to check that the pump runs freely,
reattach the fan cover (not shown) with the three screws.
14. For double-head pumps:
Carry out steps 3 to 13 for the second pump head.
15. For double-head pumps:
Pull the pneumatic head connection hose back onto the hose
connector.
16. For pump type UN035.2S_I EX:
Retighten the hose clip on the pneumatic head connection.
