SFV & SFEV SERIES X‐PROOF PUMPS
OM-06628
MAINTENANCE AND REPAIR
PAGE E - 18
as necessary. After the impeller comes free of the
shaft, retain the impeller key.
Remove the impeller adjusting shims. Tie and tag
the shims for ease of reassembly.
If no further disassembly is required, proceed to
the appropriate areas in
PUMP END REASSEMB
LY
.
Seal Removal (No Shaft Sleeve)
Carefully remove the spring retainer and seal
spring. Lubricate the rotor shaft with light oil and
work oil under the bellows assembly. Pull the rotat
ing portion of the seal off the shaft.
Work a pair of stiff wires with hooked ends between
the rotor shaft and the stationary element and pull
the stationary element and seat out of the seal
plate.
NOTE
An alternate method of removing the stationary ele
ment is to remove the screws securing the seal
plate to the motor assembly. Pry the assembled
seal plate and stationary element off the shoulder of
the intermediate. Remove the O‐ring and press the
stationary element and seat out of the seal plate
from the back side.
If no further disassembly is required, proceed to
the appropriate areas in
PUMP END REASSEMB
LY
.
Seal Removal (With Shaft Sleeve)
Carefully remove the spring retainer and seal
spring. Slide the shaft sleeve and rotating portion
of the seal off the shaft as a unit.
Apply oil to the sleeve and work it up under the rub
ber bellows. Slide the rotating portion of the seal off
the shaft sleeve.
Work a pair of stiff wires with hooked ends between
the rotor shaft and the stationary seat and pull the
stationary seat and O‐ring out of the seal plate.
NOTE
An alternate method of removing the stationary ele
ment is to remove the screws securing the seal
plate to the motor assembly. Pry the assembled
seal plate and stationary element off the shoulder of
the intermediate. Remove the O‐ring and press the
stationary element and seat out of the seal plate
from the back side.
Remove the seal sleeve O‐ring from the rotor shaft.
Proceed to
PUMP END REASSEMBLY
.
PUMP END REASSEMBLY
NOTE
Reuse of old O‐rings or shaft seal parts will result in
premature leakage or reduced pump performance.
It is strongly recommended that new O‐rings and a
new shaft seal be used during reassembly (see the
parts lists for part numbers).
Hardware Torque Values
When reassembling the pump, use the following
table to determine the proper torque values for
hardware.
Table E-1. Hardware Torque Values
TIGHTENING TORQUE
FASTENER
SIZE
DRY
LUBRICATED
FT. LBS.
NM
FT. LBS.
NM
M3
0.8
1,1
0.7
1,0
M4
1.9
2,6
1.2
1,7
M5
3.8
5,1
2.5
3,4
M6
6.5
8,8
52.2
4.3
M8
15.8
21,4
10.7
14,5
M10
32.4
44
22.1
30
M12
54.8
74
36.9
50
M14
87.8
119
58.3
79
M16
135.0
183
89.2
121
M20
273.0
370
180.0
244
M24
220.0
298
145.3
197
M30
421.0
571
276.0
374
Cleaning and Inspection of Pump Parts
With the pump inverted, stuff a clean tissue into the
stationary seal seat bore of the intermediate or
wrap a small rag around the shaft to prevent for
eign material from entering the motor cavity.
Carefully inspect any O‐rings before removal and
cleaning to determine if a proper seal existed prior
