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5.4
5.4.1
5.4.2
5.4.3
5.5
5.6
24
Lubrication of the bearings
MCHZ(S) 12,5 - 14a/b (standard bearings) - 20a/b
These pump types are provided with 2RS1 bearings which are filled with grease for their
entire duty life and which do not require any maintenance.
MCHZ(S) 16
The ball bearings and the ball bearing housing are filled with a quantity of grease on
delivery which is sufficient for the life of the bearing. In case the pump is overhauled, the
bearings and bearing chambers have to be cleaned and provided with new grease. See
paragraph 10.6 "Post-greasing of ball bearings" for recommended greases.
MCHZ(S) 14a/b with heavy bearing construction
These pump types are fitted with grease nipples so that the bearings can be greased
periodically. After every 8000 operating hours 5 grammes of grease must be added to
each bearing. In case the pump is overhauled, the bearings and bearing chambers on
drive side have to be cleaned and provided with new grease. See paragraph 10.6
"Post-greasing of ball bearings" for recommended greases.
Noise
If a pump starts making noise, this may point to certain problems with the pump unit.
A crackling noise can indicate cavitation or excessive motor noise can indicate
deterioration of the bearings.
Faults
The pump, of which you want to determine the fault, may be hot or under
pressure. Take the appropriate precautions first and protect yourself with
the proper safety devices (safety goggles, gloves, protective clothing)!
To determine the source of the malfunctioning of the pump, proceed as follows:
1 Switch off the power supply to the pump unit. Lock the working switch with a padlock
or remove the fuse.
2 Close the stop valves.
3 Determine the nature of the fault.
4 Try to determine the cause of the fault with chapter 6 "Problem solving" and take the
appropriate measures or contact your installer.
Maintenance
MCHZ/EN (0912) 4.2
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