19
WILDEN PUMP & ENGINEERING, LLC
WIL-10220-E-02
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.
CENTER BLOCK ASSEMBLY
(P/N 04-3100-01):
The pump’s center block (P/N 04-3100-01) 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 (P/N 08-3210-55-225) 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 bush-
ing wear becomes excessive, a new center block must be
used.
Figure F
(Side View)
Figure B
P/N 08-3210-55-225
P/N 04-3800-09-07
Figure E
Grooves In
Bushing Which
Contain Glyd™ Rings
*Refer to Section 8C for torque specifications.
Figure G
Center Block
(Front View)
DRILL
ALIGNMENT
DRILL
ALIGNMENT
P/U from#71477 EOM M4P
Page 19 Same Figure
Figure H
AIR VALVE
PISTON
CENTER BLOCK
END CAP
AIR INLET
AIR FILTER
SCREEN
