Teikoku DynaPump LE Series, Instruction Manual

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7. Measure and record the “g” gap before further
disassembly. See Figure 4-2, on Page 13.
8. To remove impeller, extend tabs of lock washer
and remove impeller bolt. Be careful of small
parts that can be lost.
9. Remove socket head cap screws and remove
Front Bearing Housing from Stator Assembly.
Exercise care while removing this housing be-
cause of liquids which may be contained in the
stator assembly.
10. Remove Rear Bearing Housing Bolts and remove
Rear Bearing Housing from Stator Assembly.
Exercise caution while removing this housing
because of liquids which may be contained in
the Stator Assembly.
11. Remove Rotor Assembly. Place on a clean cloth
to avoid damage. During the removal of the rotor
take care in handling the rotor to prevent dam-
age to the rotor or stator because the rotor will
drop once the armature clears the stator assem-
bly and the rotor shaft may hit the stator liner if
not properly supported.
12. Remove front shaft sleeve and front thrust collar.
13. To remove rear Shaft Sleeve and thrust collar,
bend tabs up on lock washer and unscrew bolt.
This bolt has left hand threads.
14. To remove bearing, remove set screw and slide
out bearing.
4-2. Inspection
4-2.1. Bearings
Check the following points:
A. Thrust face for scratches and chips. Refer
to Table 4-1(L), Page 14 for excess wear
on thrust surface. (Check this dimension
after bearing has been removed.)
B. Wear inside of bearing bore. Refer to Table
4-1 (A – B), on Page 14.
4-2.2. Shaft Sleeves and Thrust Collars
The rotor assembly shaft sleeves and thrust surfaces
should also be visually inspected at the bearing con-
4-1. Recommended tools for Disassembly
Reassembly and Inspection.
Size Description
17 mm Socket wrench for pump cas-
ing, rear bearing housing
bolts, rear shaft sleeve re-
taining bolt, and impeller
retaining bolt M10.
19 mm Socket wrench for impeller
retaining bolt M12.
3 mm Hex wrench for bearing re-
taining screws.
5 mm Hex wrench for front bearing
housing retaining bolts.
.200" Travel Dial Indicator to
measure endplay.
Dial calipers To measure bearing wear.
Feeler Gauges To measure “g” gap.
Torque Wrench To measure bolt tightness.
4-1.1. Disassembly
1. Fully close valves in discharge, suction and util-
ity piping.
2. Disconnect the power cables from the connec-
tion box prior to disassembly.
WARNING
SAFETY HAZARD TO PERSONNEL WILL
EXIST IF THIS STEP IS NOT FOLLOWED.
3. Remove drain plug or open drain valve to drain
liquid in the pump.
4. Since piping loads may exist, insert bracing un-
der casing.
5. Remove casing bolts. Be careful not to spill any
remaining fluid that may be trapped in casing.
6. Remove anchor bolting in order to slide pump
out of casing. Casing will remain attached to pip-
ing.
SECTION 4. Maintenance
Page 11