Diaphragm Replacement (Preventive Maintenance) - WAGNER Zip 52 Finishing Operating Manual

VERSION 11/2018
8.4

DIAPHRAGM REPLACEMENT (PREVENTIVE MAINTENANCE)

Mark the coupled parts (diaphragm covers, manifold, covers) with a felt-tip pen so as to
make subsequent reassembly easier.
Notice: When executing the following tasks it is imperative to avoid any rotation of the
shaft in the motor block!
B_04015
a) Remove the suction and delivery manifolds.
b) Disassemble the fastening nuts and remove the outer diaphragm covers. Dismount
the pressure side cover (1).
c) Hold the end nut of the outer diaphragm disc with a wrench. Loosen the end nut of
the other diaphragm disc and dismount it.
d) Remove the released diaphragm with its corresponding internal disc, and remove
the shaft from the motor block.
e) Clamp the end of the shaft released from the diaphragm in a bench vice (with
soft jaws to avoid damaging it) and remove the external diaphragm disc from the
opposite end of the shaft. Then remove the second diaphragm with its internal
disc.
f ) Assemble the new diaphragm with its internal disc and properly fasten it to the
relevant external disc.
g) Remove the shaft from the bench vice and put it in the motor block. Grease the
shaft inside and outside (beyond the underside of the motor block). Thereby move
the shaft into different positions. See Chapter 14.
h) Mount the inner diaphragm disc, the diaphragm and the outer disc and tighten
them properly onto the nut of the opposite outer discs using two wrenches.
i) Attach the silencer and the pressure side cover. Check the correct positioning of
the cover and its seal.
k) Attach the outer diaphragm cover and the manifolds. Ensure correct position of
seals of the ball valves when doing so.
l) Screw on and tighten the cover screws. Fasten the manifold screws. Apply the
correct torque, in accordance with Chapter 14.
ORDER NUMBER DOC 2332848
1
B_04066
Zip 52 Finishing
12 Nm
8.8 lbft
B_04067
38