Title: Keep your miking equipment working
Full Citation
Permanent Link: http://ufdc.ufl.edu/UF00091675/00001
 Material Information
Title: Keep your miking equipment working
Alternate Title: Dairy science mimeo report 63-4 ; Florida Agricultural Experiment Station
Physical Description: Book
Language: English
Creator: Wing, J. M.
Boggs, J. P.
Publisher: Florida Agricultural Experiment Stations, University of Florida
Place of Publication: Gainesville, Fla.
Publication Date: August 30, 1962
Copyright Date: 1962
 Record Information
Bibliographic ID: UF00091675
Volume ID: VID00001
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: 316332822 - OCLC

Full Text
* Oc

Gainesville, Florida

Dairy Science Mimeo Report 63-4
August 30, 1962

J. M. Wing and J. P. Boggs*

The milking equipment works more hours annually than any other

farm machine. It's the only farm implement used twice every day of

the year. More labor is used in milking than in all other dairy

farm operations, yet the milking machine is about the least under-

stood and most often neglected piece of farm equipment.

All milking machines operate by vacuum. This applies to those

employing either pails or pipelines. The vacuum on the teats is

continuous, it's strong, too, and would cause severe damage but for

the massaging action of the inflations (teat cup liners). They work

in the following manner. Continuous vacuum on the inside of the

inflation causes it to collapse. Periodically the pulsator applies

vacuum between the inflation and the teat cup. It is during this

interval that most of the milk flows since the inflation snaps back

to its normal shape. The alternate collapse and recovery of the

liner massages the teats, achieving the same stimulation to blood

and lymph circulation as nursing by a calf or the pressure exerted

by a good hand-milker.

The manufacturers of milking systems and allied equipm

easily understood instructions for the care, repair and o tion

of their products. These should be followed closely, but ddlionali

information also is likely to be helpful. The following ch ck ist

*Associate Dairy Husbandman and Dairy Research Unit Superintendent,
Department of Dairy Science, University of Florida, Gainesville.

can be used to locate trouble without an unduly long interruption.

It should apply equally well to pipeline and pail-type milkers.

A. If the machines have to be left on the cows for an average of

more than 3-1/2 minutes, it's likely there is a malfunction.

1. The inflation may be broken. This defect usually announces

itself with a persistent hissing noise.

2. One or more of the inflations may be worn or stretched.

This likewise can cause a hissing noise and may irritate the teats.

Useful life of rubber teat cup liners can be extended many times by

keeping two sets and alternating them at weekly intervals. Inflations

not in use may be reconditioned in two different ways. (a) They may

be stored dry in a refrigerator. The cold appears to restore elasticity

to the rubber, shortening the inflation considerably. (b) They may

be stored in a concentrated solution of lye. This will insure removal

of any fatty particles, and often will do more to restore the condition

of the rubber than will dry storage. One must have soft water for

this type of operation, otherwise the lye is likely to cause a

mineral scum which is very difficult to remove. Plastic-lined metal

pails or plastic containers can be used as storage units but the lye

must not be mixed in these vessels because the heat of solution often

is enough to melt plastic.

3. The vacuum supply may be inadequate. (a) If the slow

milking occurs mainly at the greatest distance from the vacuum pump,

the lines may be too small. It appears that lines in many older barns

should be replaced with larger ones and/or additional vacuum controllers

may be needed. (b) The vacuum pump may be too small for the operation,

particularly if the number of machines has been increased since the

original installation. (c) The belt between the motor and the vacuum


pump could be slipping due to wear or improper adjustment. (d) The

oil in the vacuum pump may be too low. (e) The vacuum line possibly

has a leak. (f) Air hoses or operating covers may be leaky. (g)

Vacuum lines or hoses could be plugged. They should be cleaned

thoroughly at least once each week, even though nothing but air sup-

posedly goes through them. On machines having adjustable pulsators,

it is possible that the pulsation is too fast. For the other type

machines, the pulsation rate is likely to be correct as long as

unusual electrical malfunctions have not occurred.

B. At times the machine milks faster at some of the teat cups

than at others. This may be caused by (1) leaking or stretched in-

flations; (2) the teat cups may be improperly attached; (3) the air

hose may be leaking; (4) the pulsator may be worn, or (5) the animal

may have malformed or injured teats.

C. If undue irritation to the udder or frequent mastitis occurs,

the following should be checked:

1. The machine may be left on too long. Any time the teat

cups creep upward they are likely to rub tender tissues of the udder

together causing injured teats and possibly more serious complications.

2. Machine may have been removed without breaking the vacuum.

To release the vacuum the udder should be pushed in just above the

teat cup, allowing air to enter the system.

3. The pulsator may be too slow,

4. The pulsator may have stopped due to failure of the

mercury switches on equipment employing this type of control.

5. The pulsators may have been damaged or worn.

6. The pulsators may be blocked by dirt or other foreign



7. The vacuum may be too high.

8. The vacuum regulator may be stuck or improperly adjusted.

It should be inspected and cleaned at regular intervals.

9. The entire system should be checked periodically, twice

a year if possible, by a factory-trained representative with special


10. The pump speed may be too fast due to improper pulleys or

a malfunction in the electrical service.

D. Excessive bacterial counts. Special attention after each

milking must be given to spots which brushes are likely to miss.

Square corners are disappearing from modern dairy equipment but to

the extent that they still exist, these spots must be inspected

with special care since they are particularly difficult to clean.

Another frequently missed hiding place for bacteria is just under

the flange of the inflations.

Milking machine operators are food handlers. They must be

sanitation-conscious and keep in mind the following points:

1. All equipment must be washed as soon after use as possible.

2. Use a cold water rinse first to remove material which would

be cooked onto the surface by hot water, thus starting a milkstone


3. Then wash with hot water, a good detergent, and plenty of

elbow grease.

4. Sanitize washed utensils with an approved bacterial inhibitor,

Most of the usual dairy sanitizing materials can be used to wash the

udders, and to rinse the teat cups between cows. Dip and wash

solutions must be changed often, however, or they do more harm than

good. Quarternary ammonium compounds and tamed iodine solutions are

increasing in popularity for use during milking. This is partly

because chlorine is likely to be irritating to the udders and the

milkers' hands, and to be harmful to the wash cloths. Another point

is that the effect of chlorine solutions is inhibited somewhat by

the presence of organic matter. Chlorine continues to be a favorite

for use on equipment.

No job on the dairy is more important than milking and nothing

gives more satisfaction than properly harvesting and handling Nature's

most nearly perfect food.

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