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95-03009
TYPE 4 DOUBLE SEAL
The Type 4 Seal is essentially two type 1 seals
assembled back to back in a chamber which bolts
to the backplate in place of the stationary seat
retainer. Except for the additional components,
(e.g. chamber, seals,) Type 1 and Type 4
components are interchangeable. (Figure 31)
CAUTIONS REGARDING HANDLING DAMAGE TO
TYPE 1 APPLY EQUALLY TO THE FOLLOWING
PROCEDURES.
DISASSEMBLY TYPE 4 SEAL
1.
Shut off and lock out power supply to motor.
2. Close both suction and discharge valves. Remove
seal flush lines from flush housing.
Disconnect the suction and discharge piping from
casing.
3. Remove casing clamp and casing. Remove
backplate O-ring. Remove the impeller retainer bolt
and O-ring. (Figure 32)
3. Pull impeller, backplate and seal off motor shaft as
a unit. BE SURE NO SHIMS ARE LOST FROM
MOTOR SHAFT.
4. Place impeller assembly FACE DOWN (on impeller
vanes) and remove hex head screws (4) from back of
seal chamber, then carefully lift off seat retainer and
flush housing. (Figure 33)
5. Loosen (2) set screws in the spring retainer and lift
off rotating seal components: rotary seal, O-ring,
washer, spring retainer, springs and washer.
There
ARE SIX SPRINGS (3 UP and 3 DOWN. )
6. Use backplate to slide rotary seal (next to
backplate) up the impeller shaft approximately
1-1/2 inches. With the backplate resting on the
impeller push the rotary seal toward the backplate
until the O-ring is free. Remove the O-ring and lift
rotary seal off shaft. (See Figure 33)
7. Remove stationary seals and L-gaskets from
backplate and seat retainer.
Note:. The stationary seal is brittle. Prying or
hammering on the seal plate can shatter the seal.
If the stationary seal cannot be removed by hand,
place a 2-1/4 inch diameter plastic or wood rod on
the impeller side of the seal and apply even
pressure to dislodge the seal.
8. Inspect and replace all damaged and worn
parts.
Figure 31
Figure 32
HEX HEAD SCREW (4)
SEAT RETAINER
L-GASKET
STATIONARY SEAL
FLUSH HOUSING
ROTARY SEAL
O-RING
WASHER
SPRING RETAINER
SPRING (6)
WASHER
O-RING
ROTARY SEAL
STATIONARY SEAL
L-GASKET
BACKPLATE
IMPELLER
Figure 33
NPT
PORT
SETSCREW
MAINTENANCE
DOUBLE SEAL
O-RING
RETAINER BOLT
CLAMP
O-RING
CASING
DISASSEMBLY FOR CLEANING AND REPAIR
O-RING
O-RING
Summary of Contents for 200 series
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Page 25: ...24 95 03009 MAINTENANCE SEE PAGE 34 MOTOR MOUNTS ELECTRIC MOTORS ...
Page 26: ...25 95 03009 MAINTENANCE SEE PAGE 34 MOTOR MOUNTS ELECTRIC MOTORS ...
Page 30: ...29 95 03009 AVAILABLE SEALS FOR 200 SERIES PARTS LISTS Figure 38 ...
Page 40: ...39 95 03009 THIS PAGE IS INTENTIONALLY LEFT BLANK INSTALLATION DIMENSIONS Style A 7 12 96 ...