WIL-10252-E-01
Wilden
®
19
Disassembly / Reassembly
REASSEMBLY HINTS & TIPS
REASSEMBLY
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. Failure to
replace worn parts with genuine Wilden parts will nullify any
warranty offered by Wilden Pump & Engineering, LLC. 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
manifolds 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 specifications.)
Be sure to tighten outer pistons simultaneously on PTFE-
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 before tightening large clamp bands. Push
down on opposite side diaphragm assembly until diaphragm
is inverted. Place opposite liquid chamber on center section
and align.
When reinstalling elastomeric valve seats, make sure the
beveled surface mates with the manifold for proper sealing
characteristics
MAXIMUM TORQUE SPECIFICATIONS
Description of Part
Metal Pumps
Air Valve
9.0 N•m (80 in-lbs)
Outer Piston
135.6 N•m (100 ft-lbs)
Small Clamp Band (PTFE-fitted))
15.5 N•m (137 in-lbs)
Small Clamp Band (Rubber-fitted))
5.6 N•m (50 in-lbs)
Large Clamp Band (All)
47.4 N•m (35 ft-lbs)
Air Chambers
27.1 N•m (20 ft-lbs)
Center Block Assembly
27.1 N•m (20 ft-lbs)
2C-Ring Inner Piston
18.9 N•m (14 ft-lbs)
Metal Screen & Inlet Cover
9.0 N•m (80 in-lbs)
Polyurethane Screen & Inlet Cover
2.3 N•m (20 in-lbs)
Stallion Handles
40.7 N•m (30 ft-lbs)
