Page 36
EN
Assembly instructions
4.4 Lubrication line connection
The lubrication line must be connected to the
lubrication unit in such a way that no forces
can be transferred to the assembled lubrication
unit (stress-free connection).
Danger!
The fittings used to connect the lubri-
cation line should be rated for the max-
imum operating pressure of the lubri-
cation unit. If they are not, the
lubrication line system needs to be pro-
tected from excessive pressure by
means of a pressure-limiting valve.
For operating pressures up to 45 bar as can
occur especially in single-line piston distributor
systems, SKF fittings for solderless pipe unions
can be used (double tapered sleeves or tapered
sleeves). For higher operating pressures up to
250 bar as can occur especially in progressive
centralized lubrication systems, SKF cutting-
sleeve screw unions conforming to DIN 2353
can be used.
If using fittings from other manufacturers, pay
careful attention to the assembly instructions
and technical specifications provided by the
manufacturer.
4.4.1 Lubricant filling
When arranging the main and secondary
lubricant lines, observe the following instructions
in order to ensure that the entire lubrication
system functions smoothly.
The main lubricant line must be dimensioned
in accordance with the maximum operating
pressure occurring in the lubrication unit used
and the displacement volume of that lubrication
unit. If possible, the main lubricant line should
rise upward from the lubrication unit and be
ventable at the highest point on the lubrication
line system. Lubricant distributors at the end
of the main lubricant line must be installed
such that the outlets of the lubricant distributors
point upwards. If the system configuration
requires that the lubricant distributors be
arranged below the main lubricant line, they
should not be placed at the end of the main
lubricant line.
The pipes, tubes, shutoff valves and directional
control valves, fittings, etc. that will be used
must be designed for the maximum operating
pressure of the lubrication unit, the permissible
temperatures and the lubricants that will be
delivered. In addition, the lubrication line system
needs to be protected from excessive pressure
by means of a pressure-limiting valve.
All components of the lubrication line system
such as pipes, tubes, shutoff valves, directional
control valves, fittings, etc. must be carefully
cleaned before assembly. No seals should
point inward in the lubrication line system, as
this could hinder lubricant flow and introduce
contaminants into the lubrication line system.
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