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Maintenance and Servicing
When maintaining these units and in situations
where personnel could be hurt by moving parts
or by live electrical parts the rotary lobe blower must
be isolated by totally disconnecting the electrical
supply. It is imperative that the unit cannot be re-
started during the maintenance operation. Do not
maintain a rotary lobe blower that is at its normal
operating temperature as there is danger from hot
parts or hot lubricant.
1. Lubrication (picture
and D 861)
When the units are in continuous use the oil level in the
sight glasses (I
, I
) should be checked weekly. The oil
1
2
level in the two end cases however can only be topped up
when the units are switched off.
First oil change is required for these two chambers, after
400 operating hours (see oil drain screws (K
changes every 3000 operating hours. For oil capacity see
data sheet D 861.
The viscosity must correspond to ISO-VG 150 according
to DIN 51 519. Designation according to DIN 51 502: CLP
HC 150
We recommend the following oil brands: GEAR-LUBE 150
or equivalent oils from other manufacturers (see oil type
plate (M)).
If the oil brand is changed, the old oil must be
drained completely from the oil chambers.
Old and used oil must be disposed of corresponding
with the relevant health, safety and environmental
laws.
2. Re-tensioning of the V-belts (pictures
Check regularly (at least every 800 operating hours) the
tension of the V-belts and correct if necessary.
Check and correct the tension of the belts only if they are cool.
The belts must only be changed in their entirety. A set of spare belts will be supplied with the unit for the first delivery.
The correction of the belt tension for the SHARK (30) or (60) can be done by adjusting screws (Y
For setting of the belt tension with a certain test force (f) per belts you must find out the deflection (e) and compare with the rated value. You can
find the rated value for the test force (f) or the deflection (e) inside of the belt drive (Y
3. Cooling (pictures
and
The air slots of the SHARK (60) for the cooling air entries (E) and cooling air exits (F) as well as the protection grill of the ventilation fans (V) may
become clogged by dust. They can be cleaned, by blowing out with compressed air.
4. Filter (pictures
)
The capacity of the rotary lobe blower can become reduced if the filter is not maintained correctly.
The filter on the suction side of the WPB (30) or (60) built-in filter (D) must be checked weekly.
The necessity of the maintenance (WPB 120-750: - 35 mbar, WPB 1000-8300: -50 mbar or red area) is shown by the filter servicing indicator (Z
The filter can be cleaned by blowing out with compressed
air or replaced.
5. Pressure limitation valve (U
The mechanical functionality should be checked every
400 operating hours.
WPB (60)
, K
)). Further
1
2
Z
Z
and
)
)
) (picture
)
1
2
1
) on a special sign.
1
V
) on the motor mounting.
3
V
).
1
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