Teikoku USA | Chempump
Instruction Manual HE-12270 (1219)
15
4. Maintenance
4.1 Recommended Tools for Disassembly,
Reassembly, and Inspection
Table 4.1 Recommended Tools
Size
Description
Metric socket wrenches For pump casing, pipe casing, circulation
pipe, and rear bearing housing bolts, rear
shaft sleeve retaining bolt, and impeller
retaining bolt.
Metric hex wrenches
For bearing retaining screws.
For front bearing housing and internal
multi-stage components retaining bolt.
.200" or greater
travel dial indicator
To measure endplay.
Dial calipers
To measure wear of components and the
“g” gap.
Torque wrench
To measure bolt tightness.
Channel-lock pliers
To bend up tabs on lock washers.
4.2 Disassembly
Caution!
Observe and adhere to the end user specific lock out tag
out procedures.
Caution!
Oil filled motor. Junction box must be in upright positions
when removing the junction box and terminal plate.
Attention!
Match mark components to establish location during reas-
sembly. Be careful of small parts that can be lost.
1. Disconnect the power cables from the connection box prior
to disassembly.
Hazard!
Safety hazard to personnel will exist if power cables
are not disconnected.
2. Fully close valves in discharge, suction, and utility piping.
3. Drain pump per end user specific procedures.
4. Since piping loads may exist, insert bracing under piping.
5. Remove discharge and suction flange bolting.
Hazard!
Always assume that there is liquid left in the pump.
6. Remove anchor bolting in order to slide entire pump including
casing out of piping. Transport pump to maintenance shop.
7. Match mark external components.
8. Remove circulation pipe bolting. Remove circulation pipe, ori-
fice plate, and gaskets.
9. Remove front support foot.
10. Remove casing bolts and slide casing off. Be careful not to al-
low the casing to bind to or drop onto the inducer. Be careful
not to spill any remaining liquid that may have been trapped
in casing. Remove casing gasket.
11. Remove o-ring from diffuser plate.
12. Measure and record the end play.
13. Remove pipe casing bolts and slide pipe casing off multi-stage
assembly. Remove gasket.
14. Match mark internal components.
15. To remove inducer, extend tabs of lock washer and remove
impeller bolt. Slide inducer off rotor shaft.
16. Remove socket head cap screws and remove diffuser plate.
17. Slide first stage impeller off rotor shaft and mark as #1.
18. Remover impeller key.
19. Remove socket head cap screws and remove first diffuser.
20. Slide adjusting washers off rotor shaft. Record quantity and
thickness. The adjusting washers may come off with first-
stage diffuser.
21. Remove socket head cap screws and remove first bowl.
22. Remove set screw and slide sleeve off rotor shaft.
23. Slide second stage impeller off rotor shaft and mark as #2.
24. Remove impeller key.
25. Remove socket head cap screws and remove second diffuser
and bowl.
26. Remove adjusting washers. Record quantity and thickness.
27. Slide third stage impeller off rotor shaft and mark as #3.
28. Remove impeller key
29. Remove socket head cap screws and remove third diffuser and
bowl.
30. Remove adjusting washers. Record quantity and thickness.
31. Slide fourth stage impeller off rotor shaft and mark as #4.
32. Remove impeller key
IMPORTANT!
NRTL certification per UL 778 & CAN/
CSA C22.2 No. 108-14 requires operation with oil
filled stator winding. Original supply includes inert FC-
770 oil. Oil fill after maintenance should be confirmed
for NRTL compliant operation.
