19
WILDEN PUMP & ENGINEERING, LLCWIL-10230-E-02
P/N 08-3300-07 Bronze
Bushing can be pressed
into a stainless steel or
cast iron center section.
(See Figure F). When
installing a new bush-
ing, four bleeder holes
which allow the pump to
exhaust air must be drilled.
(See Figure G).
Small nicks can usually be dressed out and the piston
returned to service. Make sure that the guide pin is straight
and smooth or the piston will not move freely in the cylin-
der. Clean out anti-centering pin holes located at each side
of the piston. Pin holes are located on each side of the
annular groove on the top of the piston and travel to each
end. New o-rings should be installed on the end caps.
Lubricate the o-rings 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 specifications in
Section 8D (page 21).
GLYD™ RING REPLACEMENT:
When the Glyd™ rings become worn, they will no longer
seal and must be replaced. Due to the design character-
istics 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:
The pump’s center block consists of a polypropylene or die
cast housing with a cast-in bronze bushing. 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 func-
tion of the pump, it is necessary that they be located in
the proper grooves. The bronze bushing is replaceable in
cast iron or stainless steel center blocks only. When bush-
ing wear becomes excessive, a new center block must be
used.
Figure F (Side View)
4.8 mm (3/16”)
DRILL
BLEED-OFF
PORT
4.0 mm (5/32”)
DRILL
BLEED-OFF
PORT
4.8 mm (3/16”)
DRILL
BLEED-OFF
PORT
Figure E
Grooves in
bushing which
contain Glyd™ rings
P/N 08-3800-03-07
P/N 08-3210-55-225
Figure G
Center Block
(Front View)
To Next Page
