Changing liners every 2,500 cow milkings has been proven to improve productivity and profitability of the farmer through three majors areas;
• Improved Milking Hygiene
• Improved Udder Health
• Improved Milking Performance
Milking Hygiene Evidence
The increasing roughness of liners inner surfaces with age, enable the bacteria in the liners to survive the cleaning and sanitation process, by hiding in these microscopic cracks. This means there is an increased risk of high total bacteria count.
Research work has shown that following the milking of an infected cow with S.Aureus, infections can spread to the next 6-8 cows, through a contaminated liner – even if it is in good condition.*
*Reference – THUM et al., (1975).
Udder Health Evidence
Worn liners result in reduced stimulation of the teat end causing more congestion and odema. This means that the teats have been exposed to vacuum for a longer period of time. As a consequence, the defence mechanisms of the teat will be weakened. This weakened defence mechanism, along with incomplete milking out, increases the teats predisposition for new infections.*
*References – EBENDORFF et al., (1986): ZIESACK et al., (1986).
Milking Performance Evidence
The massage force of overused liners is reduced in comparison to good liners. Worn liners will account for an increase in time for milk flow of about 2 to 2.5 minutes (or 29%), for individual cows*1
Worn out liners are often the reason for increased strippings and decreased total yield. Milking with over used liners will reduce milk yield by 4 to 5%*2
*1 Reference – SCHWIDERSKI (1986).
*2 Reference – E. O’CALLAGHAN, (1994).
We have taken the guess work out of calculating your liners life, simply click on the link following and enter the number of cows you are milking and the number of clusters in your dairy to give you a guide as to how many days before your liners will need to be replaced.
Click here to open the liner life calculator.