Preparing to Install the Pump5
Warnings for Handling Helical Rotor Pumps5.1
WARNING (helical rotor models) DO
NOT APPLY MACHINE GREASE TO THE
PUMP. Ordinary machine grease will
damage the stator (NBR rubber) and
void the warranty. Helical rotor pumps are
lubricated at the factory with a clear, non-toxic
grease. Its only purpose is temporary, to allow the
pump to be run dry for a short time to test the
direction of rotation. There is no normal reason to
reapply lubricant but if you do, use VASELINE
(petroleum jelly, white petrolatum) or non-toxic
silicone grease approved for water valves and
seals.
WARNING FOR SIPHON APPLICATIONS
If a pump system has a vertical lift
LESS THAN 33 ft (10 m) up from the
surface of the water source, and then
the water flows downhill to a lower point, a siphon
effect may cause suction on the pump. This will
cause an upward thrust on the motor shaft,
resulting in damage to the motor. Prevent this by
installing an air vent or a vacuum breaker at the
high point on the pipe.
CAUTION (helical rotor models)
BEFORE INSTALLATION, KEEP THE
PUMP OUT OF THE SUN. If the pump
gets hot, the rubber stator will
expand and may lock the rotor. No damage will
result from this, but you may be unable to test the
direction of rotation. If the pump gets hot, allow it
to cool in water for 20 minutes before testing.
Pumps should not be stored in water
for a period longer then three month.
Too long storage time might seize the
pump up. Pumps will not be
damaged, but might have to be pulled to free them
again. Therefore it is strongly advised that every
two to three months the pumps should run for a
few minutes.
Assembling the Rotor on the Motor Shaft5.2
What you need:
glue Loctite 222
acetone or alcohol, 50 ml
wrenches 13 mm, 22 mm,
1m steel pipe to extend 22mm wrench.
a piece of cloth or a towel
Unthread 8 M8 nuts to take the pump housing out(1)
Settle motor horizontally, use wrench 13 mm to fix mo-(2)
tor shaft, 22 mm wrench with 1 m extension pipe fixed
on pump rotor shaft. Push down the extension pipe
anticlockwise from motor flange view, with ~50 Nm
torque, rotor shaft will be unthreaded from motor
shaft. NO TORCH
Clean motor screw shaft and inner thread of rotor (3)
M16 with a cloth dipped in acetone or alcohol.
Drop approx. 1 ml Loctite 222 glue into thread (4)
chamber M16 of rotor, then thread rotor shaft on to
motor shaft.
Take a 13 mm wrench to fix motor shaft, 22 mm (5)
wrench to fix rotor shaft, fasten them by hands as
hard you can. 50 Nm are needed to fix pump rotor
with motor shaft. Clean the glue that got squeezed
out.
Clean motor flange and four bolts, make pump hous-(6)
ing assembly and settle it on motor flange, drip a drop
of Loctite 222 glue on each bolt. One 8 mm spring
washer and two pieces of M8 nuts are used to fix
pump end on each bolt. 12 Nm are needed to fix nuts.
Clean the glue that got squeezed out.
An hour later the glue will be have dried and be suf-(7)
ficiently adhesive. Then the pump can be used or put
down to well.
Assembling the Rotor on the Motor Figure 15:
Shaft
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