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WILDEN PUMP & ENGINEERING, LLC
SECTION 8C
REASSEMBLY HINTS & TIPS
ASSEMBLY:
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 assem-
bled first, then the diaphragms and finally the wetted path.
Please find the applicable torque specifications on this page.
The following tips will assist in the assembly process.
•
Clean the inside of the center section shaft bushing to
ensure no damage is done to new seals.
•
Stainless bolts should be lubed to reduce the possibility of
seizing during tightening.
•
Level the water chamber side of the intake/discharge mani-
fold to ensure a proper sealing surface. This is most easily
accomplished by placing them on a flat surface prior to
tightening their clamp bands to the desired torque (see this
page for torque specs).
Description of Part
Metal Pumps
Air Valve
3.4 N•m [30 in.-lbs.]
Outer Piston
38.0 N•m [28 ft.-lbs.]
Vertical Bolts
13.0 N•m [115 in.-lbs.]
MAXIMUM TORQUE SPECIFICATIONS
•
Be sure to tighten outer pistons simultaneously on Teflon
®
-
fitted pumps to ensure proper torque values.
•
Place one liquid chamber on its side and align center
section with chamber using alignment marks made during
disassembly. Push down on diaphragm assembly until
diaphragm is inverted. Place opposite liquid chamber on
center section and align.
•
Position valve balls, seats, and o-rings in discharge
manifold. Place vertical through discharge manifold with
threads pointing up. Install washer and start threads of bolt
(about 1
1
⁄
2
turns).
•
Place center section and liquid chambers on intake manifold.
•
Position discharge manifold and bolt assembly on liquid cham-
bers. Ensure proper alignment of mating surfaces between
liquid chambers and manifolds before tightening bolts.
•
Apply a small amount of Loctite 242 to the steel bore of the
shaft from the diaphragm assembly.
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