Dover Wilden Original A8, Инженерия, эксплуатация и обслуживание

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WILDEN PUMP & ENGINEERING, LLC WIL-10270-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 cylinder.
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 8C.
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:
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 function 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 bushing wear becomes excessive,
a new center block must be used.
Figure F (Side View)
Figure G
Center Block
(Front View)
3/16" DRILL
BLEED-OFF
PORT
3/16" DRILL
BLEED-OFF
PORT
5/32" DRILL
BLEED-OFF
PORT
P/N 08-3800-09-65 P/N 08-3210-55-225
Figure E
Grooves in
bushing which
contain Glyd™ rings