Specifications

WILDEN PUMP & ENGINEERING, LLC 18 WIL-10410-E-02
Figure A
SHAFT SEAL
TAPE
Figure B
SHAFT SEAL
TAPE
NEEDLE NOSE
PLIERS
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 assembled 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.
• 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mufer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.
PRO-FLO
®
Shift MAXIMUM TORQUE SPECIFICATIONS
Description of Part Torque
Air Valve 13.6 N•m (120 in-lbs)
Air Chamber/Center Block 27.1 N•m (20 ft-lbs)
Inner Piston Ring 19.0 N•m (14 ft-lbs)
Outer Pistons, Rubber & PTFE 135.6 N•m (100 ft-lbs)
SHAFT SEAL INSTALLATION:
PRE-INSTALLATION
• Once all of the old seals have been removed, the
inside of the bushing should be cleaned to ensure
no debris is left that may cause premature damage
to the new seals.
INSTALLATION
The following tools can be used to aid in the installation
ofthenewseals:
Needle Nose Pliers
Phillips Screwdriver
Electrical Tape
• Wrapelectricaltapearoundeachlegoftheneedlenose
pliers (heat shrink tubing may also be used). This is done
to prevent damaging the inside surface of the new seal.
• Withanewsealinhand,placethetwolegsoftheneedle
nosepliersinsidethesealring.(SeeFigureA.)
• Openthepliersaswideasthesealdiameterwillallow,
then with two fingers pull down on the top portion of
the seal to form kidney bean shape. (See Figure B.)
• Lightly clamp the pliers together to hold the seal into
the kidney shape. Be sure to pull the seal into as tight
of a kidney shape as possible, this will allow the seal to
travel down the bushing bore with greater ease.
• Withthesealclampedinthepliers,insertthesealinto
the bushing bore and position the bottom of the seal
intothecorrectgroove.Oncethebottomofthesealis
seated in the groove, release the clamp pressure on the
pliers. This will allow the seal to partially snap back to its
original shape.
• After the pliers are removed, you will notice a slight
bump in the seal shape. Before the seal can be properly
resized, the bump in the seal should be removed as
much as possible. This can be done with either the
Phillips screwdriver or your finger. With either the side
of the screwdriver or your finger, apply light pressure
to the peak of the bump. This pressure will cause the
bump to be almost completely eliminated.
• Lubricate the edge of the shaft with NLGI grade 2
white EP bearing grease.
• Slowly insert the center shaft with a rotating motion.
This will complete the resizing of the seal.
• Performthesestepsfortheremainingseal.
REASSEMBLY HINTS & TIPS