6.3. Vent centralized lubrication system
Warning!
The lubricant may only be fed without
bubbles. Air pockets in the lubricant
adversely affect the function of the piston
pump unit and impair the reliability of
lubricant delivery, which can result in
damage to the lubrication points requiring
lubrication.
The process of venting the centralized lubrication
system can be facilitated by:
o Opening the ends of the main lubricant line until
bubble-free lubricant discharges from the ends.
o Filling long lubricant line sections before
connecting.
The centralized lubrication system is vented as
follows:
• Disconnect the main lubricant lines from the
piston pump unit. Operate the piston pump
until the lubricant emerging from the
pressure regulating valve is free of bubbles.
Reinstall the main lubricant lines.
• Disconnect main lubricant line from master
distributor. Operate the piston pump until
lubricant emerges free of bubbles. Reinstall
the main lubricant lines.
• Disconnect lubricant branch lines from
master distributor. Operate the piston pump
unit until bubble-free lubricant emerges from
all ports of the master distributor. Reinstall
the lubricant branch lines.
• Finally, vent the lubricant branch lines,
secondary distributors, lubricant lines, and
lubrication points, and check for proper
functioning.
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