Replacing The Diaphragm - WACKER Group PDT 2 Repair Manual

Disassembly/Assembly Procedures
5.5

Replacing the Diaphragm

See Graphic: wc_gr003453
5.5.1
5.5.2
5.5.3
5.5.4
5.5.5
5.5.6
5.5.7
5.5.8
5.5.9
5.5.10 Carefully position the connecting rod/diaphragm assembly (e)
5.5.11 Reinstall the connecting rod cover (a).
wc_tx000590gb.fm
Removal:
Turn off the engine.
Remove the connecting rod cover (a).
With the stop switch in the OFF position, slowly pull the starter rope
until the crank arm (b) is in its upper most position.
Loosen the screw (c) that secures the crank arm to the gear shaft.
Remove the screws (h) that secure the pump housing to the water box
(d) and remove the water box.
Slide the crank arm off the gear shaft and remove the connecting rod
(e), with the diaphragm attached, from the pump.
Remove the screws (f) (or studs and nuts) securing the diaphragm (g)
to the connecting rod and remove the diaphragm.
Installation:
Secure the diaphragm (g) to the connecting rod with screws (f) (or
studs and nuts). Torque the screws to 75–81 Nm (55–60 ft.lbs.).
Secure the crank arm to the gear shaft with the screw (c).
between the pump housing and the water box. Secure the diaphragm
and the water box to the pump frame with screws (h). Tighten the
screws in progressive steps following the pattern A, B, C, and D as
shown. When assembled correctly, the diaphragm should be
compressed to a width of approximately 9.5 mm (3/8 in.) around the
entire circumference. Torque the screws to 32 Nm (23 ft.lbs.).
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PD Repair