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Lower Motor Housing
SEAL ASSEMBLY
FIGURE 5
Retaining Ring (1A)
G-1 SHAFT SEAL SERVICE
Disconnect power, remove screws and lockwashers, and
vertically lift motor assembly from body. Clean out body if
necessary. Clean and examine impeller for pitting or wear.
The impeller is threaded onto the shaft and to remove,
unscrew impeller, holding shaft with a large screwdriver.
CAUTION: - Handle seal parts with extreme
care. DO NOT scratch or mar lapped surfaces.
To expose shaft seal (1) disassemble volute and impeller
as outlined in above paragraph. Remove rotating member
(1b) from shaft (See Fig. 5). Examine all seal parts and
especially contact faces. Inspect seal for signs of wear such
as uneven wear pattern on stationary members, chips and
scratches on either seal face. DO NOT interchange seal
components, replace the entire shaft seal (1). If replacing
seal, remove stationary (1a) by prying out with fl at screw
driver.
Clean and oil seal cavities in lower motor housing. Lightly oil
(DO NOT use grease) outer surface of stationary member
(1a). Press stationary member (1a) fi rmly into lower motor
housing, using a seal pusher, nothing but the seal pusher
is to come in contact with seal face (See Fig. 6).
Stationary Member (1d)
Polished Face Out
Lower Motor Housing
FIGURE 6
Bushing
Bearing
Seal Pusher
IMPORTANT ! - DO NOT hammer on the seal
pusher- it will damage the seal face.
Make sure the stationary member is in straight. Slide a bullet
over motor shaft. Lightly oil (DO NOT use grease) shaft,
bullet and inner surface of bellows on rotating member (1b)
See Fig. 7. With lapped surface of rotating member (1b)
facing inward toward stationary member (1a), slide rotating
member (1b) over bullet and onto shaft, using seal pusher,
until lapped faces of (1a) and (1b) are together (See Fig.
5).
Motor & Lower Motor
Housing
Bullet
FIGURE 7
It is extremely important to keep seal faces clean during
assembly. Dirt particles lodged between these faces will
cause the seal to leak. Place spring (1b) over shaft and in
place on rotating member (1c), making sure it is seated.
Slide retaining ring (1a) over shaft and let rest on spring
(1b).
Before installing impeller, inspect threads on shaft and
impeller to assure that they are clean. Apply a thread
locking compound to shaft threads and screw impeller
onto shaft and tighten. Rotate impeller to check for binding.
Install motor housing assembly on pump body. Apply thread
locking compound to each cap screw, thread into body with
lockwashers, and torque to 11 ft. lbs. Check for free rotation
of impeller. Assemble impeller and volute, replace oil.
7
Stationary (1D)
Polished Mating Surface
Rotating Member (1C)
Spring (1B)
Seal Pusher
Rotating Member
(1C)
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