Wilden Saniflo PS4 Hygienic Series, Engineering, Operation & Maintenance, Page: 24 / 36

WIL-12610-E-04
Wilden ®
24
Disassembly / Reassembly
Single-Point Exhaust
Step 1
Remove pilot exhaust muffler in pilot
bleed port located at the front of the
center block.
Install 1/4" NPT pipe plug (00-7010-08)
into bleed port.
Reassembly Hints & Tips
Step 2
Next, install an optional single-point exhaust gasket (04-
2638-52). The single-point air valve gasket can be
purchased as a spare part or included with the purchase of a
new Pro-Flo
®
SHIFT pump.
Upon performing applicable maintenance to the air distribution
system, the pump can now be reassembled. Please refer to the
disassembly instructions for photos and parts placement. To
reassemble the pump, follow the disassembly instructions in
reverse order. The air distribution system needs to be assembled
first, then the diaphragms and finally the wetted path.
The following tips will assist in the assembly process:

Lubricate air valve bore, center section shaft and pilot
spool bore with NLGI grade 2 white EP bearing grease
or equivalent.

Clean the inside of the center section shaft bore to ensure
no damage is done to new shaft seals.

A small amount of NLGI grade 2 white EP bearing grease
can be applied to the muffler and air valve gaskets to
locate gaskets during assembly.

Make sure that the exhaust port on the muffler plate is
centered between the two exhaust ports on the center
section.

Stainless bolts should be lubed to reduce the possibility of
seizing during tightening.

Use a mallet to tap lightly on the large clamp bands to seat
the diaphragm before tightening.
PRO-FLO
®
SHIFT MAXIMUM TORQUE SPECIFICATIONS
Description of Part Torque
Air Valve 11.3 N
•
m (100 in-lb)
Dial set screw 11.3 N
•
m (100 in-lb)
Outer pistons, all diaphragms 47.5 N
•
m (35 in-lb)
Center block-to-stand bolt 44.7 N
•
m (33 in-lb)
Center block-to-bushing bolt 44.7 N
•
m (33 in-lb)
Locking Pin 44.7 N
•
m (33 in-lb)
Anti-Rotation Bolt 67.8 N
•
m (50 in-lb)
NOTE: To ensure proper
alignment during reassembly
of manifold/liquid chamber
interface, turn off-set portion
of valve housing to the left or
to the right. This procedure
works for the inlet manifold
and discharge manifold
connections
Off-Set
Valve