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d
l
1
l
2
e
b
v
1
v
n
m
s
5
S
s
1
f
t
1
t
2
s
2
Y
L
1
L
L
2
VLB
10
25
40
80
100
50 Hz
0,034
0,069
60 Hz
0,041
0,083
6. Oil metering pump (pictures
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and
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)
The oil metering pump is preset to the required output, at the factory.
This rate can only be changed on request to our Company.
If however it is neccessary to change
this rate on request, it can be achieved
as follows:
Unscrew oil tank (Y) with gasket. Un-
screw oil pump cover (L
1
). The rate can
only be changed by turning the regulat-
ing screw (L
2
). Reduce oil counter-clock-
wise, increase oil clockwise. The capac-
ity will be changed about
1
/
6
per revolu-
tion.
2. Condensate and waste oil drain (picture
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)
When the pump is operating, it is imperative that the occurring
condensate/oil mixture is let off by opening the ball cocks (W)
regularly. As a standard, a level checking (V
1
) is installed, which
switches off the pump automatically at corresponding level.
3. Changing blades (pictures
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and
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)
The blades (6 pieces) can be changed as follows:
Unscrew the screws (s
5
) on the motor flange (n). Pull off the
motor (m) together with the motor side coupling half (q). Remove
the circlip (l
1
), pull off the coupling (q
1
) and fan (v) complete from
the pumpshaft. Remove the fan cover (v
1
). Remove key (l
2
) out
of the key-way. Remove bearing cover (e) and housing cover (b)
with gaskets. Remove the blades (d) and check.
Blades (6 pieces) must be changed completely.
Oil blades slightly before assembly. Blades should move easily
in rotor slots.
Re-assemble in reverse order.
4. Air filtration (picture
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)
The capacity of the pump can be reduced if the air inlet
filters are not maintained correctly.
The mesh filter (f) and additional separators (Z
1
/ Z
2
) must be
emptied and cleaned regularly depending upon the amount of
contamination or the filter inserts must be replaced completely.
Unscrew the screws (s
1
). Remove angle flange (S) with gasket.
Remove mesh filter (f) and clean by blowing out with com-
pressed air or replace. Re-assemble in reverse order.
5. Oil separation (pictures
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and
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)
Extremely blocked filter elements will result in an
increased pump temperature and will cause discol-
ouration of the lubricant.
The oil separator elements may become contaminated after a
long period of operation which can result in high pump temper-
ature and motor overload. We therefore recommend to change
the filter elements (t
2
) every 2000 operating hours or depending
upon the pollution of the sucked in medium, often it is not
possible to clean these elements.
To change filters: Unscrew the screws (s
2
). Remove cover (t
1
).
Remove the filter elements (t
2
) and exchange. Gaskets can be
re-use.
VLB 10, VLB 25, VLB 40
➝
1 filter element
VLB 80, VLB 100
➝
2 filter elements
Re-assemble in reverse order.
Oil consumption in l/hr
Reduction of oil
Increase of oil
