SPX APV Ws+, Instruction Manual

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453261 ISS U 08.2008
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17. Fit the impeller. Check that the location pin (item 8, where fitted) in
the top of the back plate, mates with the half hole in the pump
body and carefully, to avoid damaging the O­ring, press the pump/
screw housing (item 1) in over the O­ring (item 6). Fasten with the
clamp ring (item 9).
18. Re­mount the air screw. Remember to use the proper tightening
torque:
M14: 70Nm (52 lbf ft)
M20: 200Nm (148 lbf ft)
19. Press the front cover into place and fit the clamp ring.
Re­assemble the re­circulation connection (if fitted)
5.3 Replacement of motor
The standard motor for the Ws+pump has a drive­end located bearing.
If the motor is replaced, the new motor must also have a drive­end
located bearing. The motor bearing is enclosed and permanently
lubricated.
The motor has both feet and flange, “small flange” (B34) for frame
sizes 80­132, “large flange” (B35) for frame 160 and larger.
Follow the instructions below when replacing the motor. For
replacement of bearings, see the motor supplier's service instructions.
1. Disconnect the pump from the power supply.
2. Removal of the front cover, air screw, pump/screw housing and
impeller (items 27, 2, 1 and 4) is begun as in para. 5.2, points1­5.
3. Remove the motor shroud and, if possible, stand the pump upright
on the motor´s fan cover. See Fig. 6.
4. Undo the four motor flange bolts and remove them. See Fig. 6.
5. Lift the backplate (item 7) and extension frame (item 14), which
are still bolted together, up and off the shaft. See Fig. 6.
Remove the washer (item 17), where fitted.
6. See Fig. 7. Loosen the screws in the shaft muff, pull the shaft off
and replace the motor.
7. See Fig. 8. Before re­mounting the pump shaft, remove any dirt
and grease from the motor shaft and the muff's internal clamping
surfaces. Mount the pump shaft loosely. Position the balance hole
over the keyway.
8. Fit the back plate and extension frame over the shaft.
9. Tighten the bolts.
10. Stand the pump back on its legs/bracket.
11. Fit the impeller and secure it temporarily with the nut (M14 or
M20) which is supplied as a tool with the pump.
5. Maintenance
Back plate
Screw
Extension frame
Motor
Fig. 6
Fig. 7
Shaft
Screw
Fig. 8
Motor
Keyway
Motor shaft
Balance hole
Pump shaft