salmson NOLH series, Installation And Operating Instructions Manual

Page: 54 / 65

ENGLISH
21
13. Add flat gasket 40.01, key 94.01, impeller 23.00 and flat gasket
40.03.
14. Tighten nut 92.20 with helicoil 93.00.
15. Insert wear ring 50.20, screws 56.00 and then stud bolts 90.20.
16. Insert flat gasket 40.00 between the bearing bracket assembly
and the casing 10.20. Tighten nuts 92.00.
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 Tightening torques
M6 8,5 Nm
M8 12 Nm
M10 25 Nm
M12 40 Nm
M16 90 Nm
M20 175 Nm
M24 300 Nm
M30 500 Nm
M36 700 Nm
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.