Reassembly; Replace The Seal - Bell and Gossett e-80SC Series Instruction Manual

• Review the pump hydraulic selection data and consult your local Xylem representative
to select the proper reduced diameter.
• For the e-80SC 5x5x7B model, before trimming the impeller refer to the angle cut
guidelines below.
• For machining recommendations, see P2002535 Stainless Steel Impeller Trimming
Guidelines.
Balancing
It is recommended that impellers trimmed more than 5% in diameter be rebalanced per
ISO 1940 grade G6.3.
Angle cut guidelines
Model e-80SC 5x5x7B pump impellers must be angle cut at reduced diameters according
to the following information.
ØA
Figure 11: 5x5x7B impeller trim — 0.125 in. (3.17 mm) increments
A
Hydraulic diameter, nominal, as
shown on selection curves
From maximum diameter 7 in.
(177.8 mm) to 6.125 in. (155.6 mm)
6, 5.875, 5.75, 5.625 in. (162.4 to
142.9 mm)
5.5, 5.375, 5.25, 5.125, minimum 5
in. (139.7 to 127.0 mm)

6.3 Reassembly

6.3.1 Replace the seal

The inside and outside seal can be replaced without removing the motor.
1. Remove the coupling guard.
2. Remove the flush line from the seal cap.
3. If an outside seal, put seal clips in the seal and then loosen the set screws that hold the
seal on the shaft.
4. Remove the coupler halves. Tape the collar rings together in pairs as assembled
previously.
The shaft drops down when the coupling is removed.
5. If an outside seal, remove the seal.
6. Remove the seal cap or seal gland through the space between shafts.
Series e-80SC INSTRUCTION MANUAL
C
ØB
B
Diameter at impeller inlet side
shroud
Use diameter from selection curves
B = A plus 0.250 in. (6.35 mm)
B = A plus 0.375 in. (9.53 mm)
6 Maintenance
C
Trim angle
0 degrees, no angle
8 degrees
8 degrees
19