7 Servicing/Maintenance
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Multitec A SX
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Check the static seals for any leakage.
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Check the rolling element bearings for running noises.
Vibrations, noise and an increase in current input occurring during unchanged
operating conditions indicate wear.
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Check the correct functioning of any auxiliary connections.
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Monitor the stand-by pump.
To make sure that the stand-by pumps are ready for operation, start them up
once a week.
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Monitor the bearing temperature.
The bearing temperature must not exceed 90 °C (measured on the outside of the
bearing bracket).
▪
On oil-lubricated models the bearing temperature can be measured in the oil
sump. The alert limit is 100 °C. Never exceed 110 °C (pump trip).
CAUTION
Operation outside the permissible bearing temperature
Damage to the pump!
▷
The bearing temperature of the pump (set) must never exceed 90 °C (measured
on the outside of the bearing bracket).
NOTE
After commissioning, increased temperatures may occur at grease-lubricated rolling
element bearings due to the running-in process. The final bearing temperature is
only reached after a certain period of operation (up to 48 hours depending on the
conditions).
Please note the following when checking the bearing temperature:
▪
Manual temperature checks are not sufficient !
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If the bearing temperature exceeds 100 °C during start-up, switch off the pump
and check the following:
–
Check the alignment of the pump set.
–
Verify bearing type and arrangement.
–
Remove the rolling element bearings.
–
Check the grease quantity in the rolling element bearings (grease-lubricated
bearings only).
Excessive amounts of grease will cause increased temperatures.
–
After reassembly, ensure a tight press fit of the outer bearing ring via the
cover (fixed bearing).
–
A temperature rise may also occur after replacement of the bearings or
dismantling of the hydraulic system.
7.2.2 Inspection work
DANGER
Excessive temperatures caused by friction, impact or frictional sparks
Explosion hazard!
Fire hazard!
Damage to the pump set!
▷
Regularly check the coupling guard, plastic components and other guards of
rotating parts for deformation and sufficient distance from rotating parts.
