Venting The Main Lubricant Line And Mdu Micro-Metering Unit - SKF MicroDosage System Assembly Instructions Manual

Assembly instructions

4.5.1 Venting the main lubricant line and MDU micro-metering unit

See Figure 9
Requirements:
o The MDR lubricant reservoir is completely
connected and has already been vented
(see Chapter 4.3.4).
o The main lubricant line (1) has already been
arranged from the MDR lubricant reservoir
to the MDU micro-metering unit
(see Chapter 4.5).
Note!
The main lubricant line is only
connected to the MDR lubricant
reservoir, not to the MDU.
o The capillary lines are connected to the
MDU micro-metering unit
(see Chapter 4.4.3).
o The MDU micro-metering unit must be
closed and ready for operation.
o Place the oil pan under the MDU, extend
the loose end of the main lubricant line
(connection to MDU) into the pan.
Venting procedure for main lubricant line
• Apply compressed air (2) to the MDR
reservoir.
• Set the pressure control valve (3) to 4 bar.
The MDU can be mounted in any position,
so the highest vent plug (vent plug (4) or
(5)) should be used.
• Loosen and unscrew MDU vent plugs ((4)
or (5)).
• Slowly open the MDR stopcock (6) so that
oil can enter the line in a controller
manner.
• If bubble-free lubricant discharges at the
end of the loose main lubricant line (1),
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immediately attach the loose end of the
lubricant line to the plug connector of the
MDU (7).
Venting procedure for MDU
The main lubricant line must not escape
from the plug connector.
• Check whether the hose is correctly in-
stalled; briefly pull on the end of the main
line to do so.
Due to the integrated oil microfilter within
the MDU and to the system's oil duct de-
sign, the following venting procedure may
take more than 5 minutes.. The venting
procedure can only be completed once
bubble-free oil discharges from the vent-
ing bore.
• Close the venting bore with the vent plug
((4) or (5)) as soon as bubble-free oil
EN