Waukesha 200 series, Operation, Maintenance And Parts Manual, Page: 24 / 53

23
95-03009
O-RING
Figure 34
Figure 35
Figure 36
RETAINER BOLT
.030 inches
SETSCREW
BACKPLATE
O-RING
CASING
ASSEMBLY OF TYPE 4 SEAL
1. Clean all parts and lubricate all elastomer (Rubber
like) parts.
2. Install L-gaskets in backplate, flush housing and
seat retainer. Install stationary seals in L-gaskets.
(Figure 34)
3. Place backplate and rotary seal onto impeller
shaft. Temporarily put 0.03" shims between the
impeller vane and back plate to preset cleaarance.
Besure to remove shims befor final assembly .
see figure 34 Place O-ring on shaft and use spring
retainer as tool to push O-ring into rotary seal.
4. Place washer over rotary seal with tabs in O.D.
notches. Place three springs in one side of spring
retainer
(hold them in place with silicone sealer) and
slide the spring retainer onto impeller shaft against
washer.
5. Place the remaining three (3) springs in the spring
retainer. Slide the washer and O-ring onto the shaft
against the spring retainer. Use the the seat retainer
to press the O-ring into rotary seal.
6. Remove 1/4 NPT plug from center port on flush
housing and install an O-ring in both ends of housing.
Install housing over seal assembly. With flush ports
facing away from the backplate place seat retainer on
housing and tighten in place with four (4) hex screws.
BE SURE TO TIGHTEN SCREWS EVENLY UNTIL
FULL METAL TO METAL CONTACT IS MADE ON
BACKPLATE AND SEAT RETAINER.
7. Check impeller/backplate clearance with the
backplate held firmly in position against motor
adapter, the clearance between the backplate and
impeller vanes should be .030-inch. (Figure 35)
See shims, page 28 and Pump Assembly, page 43.
Be sure preset shime are in place before
thighening. Add or remove shims to motor shaft as
required and tighten set screws in the spring
retainer through 1/4 NPT center port in flush
housing. Insert plug in port and tighten. (See
Figure 34)
8. Remove backplate/impeller assembly and apply
anti-seize or equal compound to the motor shaft
and install key. Install backplate/ impeller
assembly and lock in place using O-ring and
impeller retainer bolt. (Figure 35)
9. Install casing O-ring on backplate and clamp
casing in place.(Figure 36)
Note: Rotate impeller manually to insure it does not
rub on the backplate or casing.
HEX HEAD SCREW (4)
SEAT RETAINER
L-GASKET
STATIONARY SEAL
HOUSING
ROTARY SEAL
O-RING
WASHER
SPRING RETAINER
SPRING (6)
WASHER
O-RING
ROTARY SEAL
STATIONARY SEAL
L-GASKET
BACKPLATE
IMPELLER
MAINTENANCE
8-3-95
TYPE 4 SEAL
WARNING
O-RING
O-RING
FLUSH
PORT
LOCATION
PLACE
TEMPORARY
0.03" SHIM
HERE