Maintenance
DeLaval voluntary milking system VMS
94897201.pdf2007-12-18
low, this will issue an alarm and stop the
pump unit. To start the pump unit after an
alarm, see chapter “DeLaval voluntary
milking system VMS; Operation”.
Maintenance every third week
Change of liners
Preparations
1. Start a system cleaning (or make sure it
has been carried out).
2. Release the teatcups.
Change time
• 500 hours or 2500 milking sessions.
Note that the maintenance of liners mostly
depends on the number of milking sessions.
Consequently, maintenance intervals may
change depending on number of milking
cows for a VMS system.
Type of wear
The reason of deterioration of liners is due
to contact with milk, chemicals, hot water
and steam. In addition, liners wear out
during operational lifetime.
Consequences of failure to follow
maintenance schedule
Overuse of liners and abuse of detergent
leads to deterioration of the material
properties. The first sign of this is that the
liner sucks air (the mouthpiece lip is
damaged).
Liner air-sucking leads to risk of
deteriorated teat massage, which in turn
can lead to deteriorated milking
performance and negative influences on
udder health.
Symptoms of defect part
Check or change the liners in case of
prolonged milkings, raised bacteria counts,
and air-sucking during milking.
Note: Each teatcup is assigned a specific
position in the magazine. Change one liner
at a time or mark the teatcups according to
position.
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