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A.0500.551 – IM-TGMAG/02.00 EN (02/2008)
3.21.3.4 Filter or suction strainer
Any filters or suction strainers at the bottom of the suction line must be cleaned regularly.
Note! A clogged filter in the suction piping may result in insufficient suction pressure at the inlet.
Clogged filter in the discharge line may result in higher discharge pressure.
3.21.3.5 Anti-friction bearings
TG MAG pumps are equipped with 2RS ball bearings which are grease packed for life. They do not
require periodical greasing. The bearings should be replaced after 25.000 operating hours.
3.21.3.6 Sleeve bearings
We recommend checking the pump regularly for wear on the gear wheels and sleeve bearings to
avoid excessive wear of other parts.
• Aquickcheckcanbedonebyusingthefrontpull-outandbackpull-outsystem.Seetablefor
maximum allowable radial clearance of the sleeve bearings.
• Forreplacementofthesleevebearingscontactyourdistributor.
TG MAG pump size
Maximum allowed
radial clearances
15-50 to 23-65 0.15 mm
58-80 to 86-100 0.25 mm
185-125 0.30 mm
3.21.4 Front pull-out
The TG-pumps have a front pull-out system.
To remove liquid residues or to check the
idler bearing for wear, the pump cover can
be pulled out from the pump housing without
disconnecting suction and discharge pipes.
See chapters 4.0 Disassembly/Assembly and
section 6.6 Weights.
3.21.5 Back pull-out
To flush the pump or to check
the rotor shaft bearing
arrangement the bearing
bracket with outer magnetic
rotor and the rotor shaft/
bearing assembly can be
pulled out backwards without
disconnecting the suction
and discharge pipes.
When a spacer coupling is used, the driving
mechanism need not be moved.
See chapters 4.0 Disassembly/Assembly and section 6.6
Weights. for the mass (weight) of the components.
3.21.6 Clearance adjustment
The TG pumps are delivered with the correct axial clearance setting. In some cases, however, the
axial clearance needs to be adjusted:
• When uniform rotor and idler wear need to be compensated by re-setting the axial clearance.
• When pumping low viscous liquids the slip can be reduced by decreasing the axial clearance.
• When the liquid is more viscous than expected, the friction inside the pump can be reduced by
increasing the axial clearance.