Motor; Tightening Torques; Tools Required - Wilo Drain SP Notice De Montage Et De Mise En Service

then shrink and grip the shaft. Heating temperature should never exceed
100°C.
nd
2 method : Press the bearing onto the shaft using a hand press. Make
sure the force is applied on inner bearing race. Take care to avoid
damaging the shaft or the bearing.
3. Slide the assembly in the bearing housing.
4. Install bearing cover and tighten fastening screws.
9.3.2.2 ASSEMBLY OF MECHANICAL SEAL
Assembly is performed in the reverse steps of dismantling.
Using the section drawing of the pump will be necessary.
Extreme cleanliness is required when installing the mechanical
seal onto the shaft sleeve. Avoid damaging the seal faces and the
O'Ring. (shaft must be free from scratches, burrs, ...).
It is recommended to apply lightly grease or a neutral oil to ease
assembly.
Make sure the leap seal is installed in the indicated direction. See sketch
below :
Location of the rotating part of the mechanical seal don't have to
be set. Mechanical seal is set per construction.
All gaskets should be replaced by new ones before assembly. Make sure
PFTE and fiber based gaskets are not bent or broken when handled and
installed.
9.3.3

MOTOR

In order to ensure an optimum lifetime of the integrated motor a
minimum maintenance is necessary : clean cooling fins regularly, check
coupling alignment (if any), check cable gland tightening, ...
Ball bearing lifetime depends on axial and radial forces applied on motor
shaft therefore on the pump design (close-coupled pump, pump sets
with elastic coupling, ...).
Motor can be fitted with lifetime lubricated ball bearings (identified ZZ
or 2Z) or greased. Greasing nipples are located at the ball bearings and
re-greasing quantities are indicated on motor nameplate.
See motor instructions manual to find data about maintenance work to
be performed.

9.4 TIGHTENING TORQUES

Tightening torques depend on the material used in the assembly and on
the type of lubricant that is used.
Refer to applicable regulation to know the tightening torques for
the fastening of cast iron or stainless steel made flanges.
The values given below should be only indicative. If real tightening
torques are required please ask our technical services.
Threads
M6
M8
M10
M12(*)
M14
M16
M18
M24
M30
(*) : tightening torque for impeller check port and drain port fastening
nuts : 25Nm.
Stainless steel bolts : apply anti-fretting paste before assembly.

9.5 TOOLS REQUIRED

A typical range of tools that are required for pump maintenance is
listed below. Those tools are standard one and should be available
in every industrial maintenance Dpt.
• Wrenches to suit up to M48 nuts,
• Socket spanner up to M 48,
• Allen keys up to 10 mm,
• Range of screwdrivers,
• Soft mallet.
If maintenance work must be performed in an ATEX classified area
then make sure that use of all necessary tools are authorized in the
area.
More specialized equipment :
• Bearing pullers,
• Bearing induction heater for ball bearing assembly,
• Coupling grip spanner.
Additional equipments used for coupling alignment :
• Calipers,
• Crowbar,
• Straightedge,
• Shims,
• Sledgehammer.
ENGLISH
Tightening torques
9 Nm
23 Nm
46 Nm
80 Nm
130 Nm
150 Nm
180 Nm
250 Nm
300 Nm
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