Installation and operating instructions WILO Mather and Platt – Sump Pumps 29
At this stage the top shaft will be projected outside,
above the support pipe (top).
j) Fit the motor stool on the mounting plate.
k) Fit the top pipe assembly to motor stool by fasteners with top
shaft passing through the motor stool.
l) Mount the bearing in the bearing cartridge.
m) Slide the bearing spacer over the top shaft and insert the
cartridge assembly through the shaft.
n) Now the total bearing cartridge assembly will rest on the
stuffing box stool and fasten it.
o) Insert the bearing lock washer over the shaft and place the
lock nut. Firmly tight the lock nut along with the shaft. Fold the
lock washer arm into the bearing lock nut slot.
p) Place the bearing cover over the bearing cartridge and fix it by
means of screws.
q) Check the freeness of pump in horizontal condition.
r) Mount the delivery pipe to the casing with gasket.
s) Fix the delivery pipe to the mounting plate by means of
clamping plate which is already welded to the delivery pipe and
It prevents direct load acts to the casing.
t) Make all the connections like delivery bend, valves, and non-
return valve above the mounting plate. Precaution should be
taken that no direct load will act on the delivery pipe, such a way
that the pipe extension and valve assembly should be supported.
CAUTION!
Ensure that the pump shaft rotates freely.
u) Mount the pump half coupling and tighten the lock screw.
v) Make the motor electric connections. Mount the motor half
coupling and tighten the screw of the coupling. Make sure the
direction of rotation before mounting the motor on the motor
stool. The direction of rotation should be clockwise when
viewed from the top i.e. Non-driving end of the motor.
NOTE:
Direction of rotation of pump should be clockwise when
viewed from the top.
w) Mount the motor on the motor stool. Check the angular
alignment with the help of filler gauge and parallel alignment
with the help of straight edge and filler gauge. Alignment should
be within 0.05mm.
x) Grease the bearing with the help of grease gun. For further
greasing the bearing a separate grease feeder is supplied along
with the pump, which is mounted side of the motor stool.
10.5.1 Adjusting the Impeller
Proper Impeller adjustment positions the Impeller inside the
casing assembly for maximum performance.
The Impeller can be adjusted with complete rotor assembly by
means of adjusting screw with locknuts provided in bearing
cartridge.
To adjust the Impeller, release the locknuts in adjusting screw
and unscrew all the fixing screws provided in bearing
cartridge. By Unscrewing / screwing the adjusting screw in
bearing cartridge the entire total rotor assembly moves up /
down as decided.
After adjusting the Impeller make sure to lock the locknuts in
adjusting screws. Tighten the screws with bearing cartridge.
It is Important to position the Impeller correctly in relation to
the casing. No rubbing can be allowed with sidewalls or front
walls of the casing.
10.6 Recommended spare parts
In case of standard operation, we recommend the following
list of spare part regarding the period of functioning.
For 2 & 5 years of normal operation:
NOTE:
n= Number of Intermediate Bearing Brackets.
Part numbers as applicable.
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