Teikoku USA | Chempump
Instruction Manual G-Series
26
12. Remove the impeller nut, then the first stage impeller and
impeller key.
13. Remove the three screws retaining the front bearing hous-
ing to the pump casing assembly and then remove the front
bearing housing.
14. Remove the screw and lock washer holding the front bear-
ing to the front bearing housing and then remove the front
bearing.
15. A check for bearing wear can be made at this point. See
Table 4-2
.
16. Remove the nut s and bolt s retaining the pump casing to the
stator assembly, then remove the pump casing.
17. Remove the impeller space by pulling it towards the threaded
part of the shaft then remove the second stage impeller and
impeller key.
18. Remove the three retaining screws at the front balance plate
and then remove the front balance plate.
19. Seal plates are located inside the front cover plate and pump
casing assembly. These seal plates should be checked for
wear and be replaced if required. They are held in place by
three screws for each plate and can be removed by removing
these screws.
20. Reassemble pump by reversing the disassembly procedure,
replacing old gaskets with new ones. BE SURE TO TAKE UP
EVENLY ON ALL BOLTS SECURING BEARING HOUSING. Oth-
erwise, the housing may skew and misalignment may occur,
which would cause rapid bearing wear. Bolt torque values by
model are provided in
Appx. C., Page 31
.
21. Complete reassembly. Before bolting the front cover plate to
the pump casing, spin the rotor-impeller assembly by hand
to ensure that it does not bind. Also, check end play again
as noted in
Table 4-3
and
4-4
before reassembling the rear
bearing housing to the stator assembly.
22. In reassembling the impeller nut, care must be taken to com-
pletely tighten the impeller lock nut against the impeller to
ensure that is securely holds the impeller against the shaft
shoulder.
4.6 Service Policy
Any pump, damaged or inoperative for any reason, will be re-
paired at the factory at minimum cost and returned to the cus-
tomer as quickly as possible.
Caution!
Before returning units to the factory for examination or
repair,
clean and decontaminate the pump or parts
thoroughly to prevent corrosive attack during ship-
ment or injury to personnel handling returned equip-
ment. Tag pump with information regarding the fluid
it was handling and operating conditions at the time
of failure.
Proper service will be facilitated with the prop-
er submittal of a Teikoku Field Service Report Form. These
forms are available from the factory , from the Teikoku
field representatives, and from this instruction manual Ap-
pendix.
4.7 Spare Parts
Any pump, damaged or inoperative for any reason, will be re-
paired at the factory at minimum cost and returned to the cus-
tomer as quickly as possible.
Have on hand at least two extra sets of bearings, two extra sets
of gaskets, and one extra rotor assembly for each G-Series that is
installed. When ordering spare parts, give the serial number and
model designation; then give the part name which is noted on the
Exploded View Parts Diagram,
Figure 4-1
.
When ordering an impeller, include the diameter which can be
noted from the pump order acknowledgment or from the pump
nameplate.
It is recommended that the following parts be maintained as “on-
hand” spare parts for each Teikoku model installed:
1. Models GA, GB, GC, GVBS
Part
Quantity
Pump Casing Gasket
2
Rear Motor Gasket
2
Front & Rear Bearings
2 sets
Rotor Assembly
1
Bearing Housing Screw
4
Bearing Housing Screw lock washer
4
2. Models GVD, GVE, GVHS, GG, GVM, and N2S
Part
Quantity
Pump Casing Gasket
2
Rear Motor Gasket
2
Front & Rear Bearings
1 set
Impeller Nut
1
Impeller Key
1
Rotor Assembly
1
Bearing Housing Screw
4
Bearing Housing Screw lock washer
4
3. Model GLD
Part
Quantity
Coverplate Gasket
2
Pump Casing "O" Ring Gasket
2
Rear Motor Gasket
2
Front & Rear Bearings
1 set
Impeller Nut
1
Impeller Key
2
Idler Bearing
1
Impeller Spacer
1
Rotor Assembly
1
Bearing Housing Screw
4
Bearing Housing Screw lock washer
4
