21
WILDEN PUMP & ENGINEERING, LLC
WIL-10260-E-02
Figure E
Grooves In Bushing Which Contain Glyd™ Rings
P/N 04-3100-01-225
P/N 04-3800-09-07
Figure H
AIR VALVE
PISTON
CENTER
BLOCK
END CAP
AIR
INLET
AIR
FILTER
SCREEN
DRILL
ALIGNMENT
DRILL
ALIGNMENT
Figure G
Center Block
(Front View)
Figure F
(Side View)
Small nicks can usually be dressed out and the piston
returned to service. Inspect the cylinder end caps (P/N 04-
2300-23 has the piston guide pin and P/N 04-2330-23 does
not.) Make sure that the guide pin is straight and smooth or
the piston will not move freely in the cylinder. Inspect the
anti-centering pin holes found at the ends of the air valve
piston and ensure they are free of debris. New o-rings (P/N
04-2390-52) should be installed on the end caps. Lubricate
the o-rings with an arctic 5 weight hydraulic oil (ISO grade
15) and install the end caps, assuring that proper alignment
of the piston and cylinder ports is maintained (see
Figure D).
Reinstall air valve to center block of pump. Tighten per the
torque specification*.
GLYD™ RING REPLACEMENT:
When the Glyd™ rings become worn, they will no longer seal
and must be replaced. Due to the design characteristics of
the Glyd™ rings, it is suggested that you use the Ringer Seal
installation kit when replacing Glyd™ rings. Consult EOM-
Ringer for installation instructions.
CENTER BLOCK ASSEMBLY
(P/N 04-3100-01-225):
The pump’s center block (P/N 04-3100-01-225) consists of a die
cast housing with a cast-in-bronze bushing
(Figure G). Figure
H
shows T4 injection-molded polypropylene center section
(P/N 04-3150-20) and alignment with air valve. The bushing
has eleven grooves cut on the inside diameter. There are seven
Glyd™ rings that fit in these grooves (see
Figure E).
Since
these Glyd™ rings form a part of the shifting function of
the pump, it is necessary that they be located in the proper
grooves. The bronze bushing is replaceable in cast iron
center block only. When bushing wear becomes excessive,
a new center block must be used.
*Refer to Section 8 for torque specifications.
