13
GLYD™ RING REPLACEMENT/
CENTER SECTION
The pump’s center section consists of a molded housing with
a bronze bushing. (Bushing is not removable.) This bushing
has grooves cut into the inside diameter. Glyd™ rings are
installed in these grooves. When the Glyd™ rings become
worn, they will no longer seal and must be replaced.
There are two versions of center sections: PRE-ENHANCED
(pumps manufactured before March 1, 1992) and ENHANCED
(pumps manufactured since March 1, 1992). An encircled
letter “E” stamped on the top of the center section denotes
the ENHANCED type center section
(Figure C).
Please contact your local authorized distributor for
enhanced air distribution retrofit packages.
If the encircled “E” is present,
an enhanced (02-3800-
03-07) shaft should be utilized to maximize performance.
The center section Glyd™ rings (02-3210-55-225) must be
installed in the appropriate grooves as shown (1, 3, 6, 8).
If the encircled “E” is not present,
a pre-enhanced shaft
(02-3800-03 or 02-3820-03) must be utilized. An enhanced
(non-dented) shaft will not function correctly. The center
section o-rings (02-3200-52) must be installed in the appro-
priate grooves as shown (1, 3, 4, 6).
1 3 6 8
ENHANCED CONFIGURATION
ENHANCED SHAFT
1 3 4 6
PRE-ENHANCED CONFIGURATION
PRE-ENHANCED SHAFT
Figure C
The air valve assembly consists of the air valve body and
piston. The unique design of the air valve relies only on differ-
ential pressure to cause the air valve to shift. It is reliable and
simple to maintain. The bushing in the center block, along
with the diaphragm shaft, provides the “trigger” to tell the
air valve to shift. The following procedure will ensure that the
air valve on your Wilden pump will provide long trouble-free
service.
AIR VALVE BODY AND PISTON
ASSEMBLY AND DISASSEMBLY
The air valve body and piston can be disconnected from the
pump by removing the four socket-head cap screws which
attach it to the center section. The piston in the air valve is
aluminum with a dark anodized coating (see
Figure A
). The
piston should move freely and the ports in the piston should
line up with the ports on the face of the air valve body. The
piston should also appear to be dull black in color. If the
piston appears to be a shiny aluminum color, the air valve
is probably worn beyond working tolerances and should be
replaced.
If the piston does not move freely in the air valve, the entire air
valve should be immersed in a cleaning solution. (NOTE: Do
not force the piston by inserting a metal object.) This soaking
should remove any accumulation of sludge and grit which is
preventing the air valve piston from moving freely. If the air
valve piston does not move freely after the above cleaning,
the air valve should be disassembled as follows: Remove
the snap ring from the top end of the air valve and apply an
air jet alternately to the two holes located in the face of the
air valve until the end cap is blown out. (See
Figure B
, next
page
)
[CAUTION:
The air valve end cap may come out with
considerable force. Hand protection such as a padded glove
or a rag should be used to capture the end cap.] Inspect the
piston and cylinder bore for nicks and scoring.
Small nicks can usually be dressed out and the piston returned
to service. Inspect the cylinder end caps. 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 on 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 main-
tained. Use an oil with arctic characteristics (ISO 15-5wt).
SECTION 8B – TURBO-FLO™ PUMPS
AIR VALVE / CENTER SECTION
REPAIR / MAINTENANCE
WIL-10200-E-03
WILDEN PUMP & ENGINEERING, LLC
Содержание T2 Original Metal
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