Milk Meter Re-Assembly
The Milk Meter can be assembled almost totally by hand, although the more complicated components require
the use of the tools shown on page 1. Loosening and fastening the connections should be done with care.
Gently push the new probe grommets into the meter body ensuring they are fully seated
Push the probes into the probe grommets
Turn the meter body upside down and place the bottom seal into the recess around the inside edge of the
meter body. Ensure it is seated evenly
Remove the meter base from the Milk Meter stand and turn it upside-down before placing it over the
upturned meter body. This ensures that the bottom seal does not fall from the meter body.
Bring the base and body together ensuring the seal is not disturbed. Once together turn the whole
assembly the right way up and replace in the stand
Place the diaphragm over the stud on the top of the plunger and screw the diaphragm clamping disc onto
the stud.
Use a spanner to tighten the clamping disc and nyloc nut down tight on the diaphragm. The disc must be
tight enough to ensure the diaphragm cannot be pulled around (although the clamping disc must be tight, i t
must not be over-tightened). Fit the plunger seal onto the bottom of the plunger.
Take the plunger spring and hook it back onto the top of the diaphragm ensuring that the correct end of
the spring is used. (The hook on this end of the spring has a gap allowing easy insertion into the hole in the
top of the plunger stud)
Turn the plunger upside down allowing the spring to hang down and bring the inverted meter top up to
meet the plunger and diaphragm
Ensure that the plunger vacuum bypass hole is aligned to point between two of the tie rod holes in the
meter top
Whilst holding the plunger and top together in this position use the spring retrieval hook to hook the
spring and pull it gently out of the top of the assembly.
Slide the spring retaining blade into the spring about 3 coils down. During this procedure ensure the
spring is not stretched
Replace the ‘o’ring on the vacuum nipple and sit it on top of the spring and spring retaining blade
Push the cross pin through the vacuum nipple ensuring that the pin passes through the loop on the end of
the spring. The spring retaining blade can now be removed
Ensure that the spring is hooked cleanly onto the top of the plunger stud. Push the vacuum nipple into the
top of the meter ensuring a tight seal is made at the ‘o’ring and the nipple is fully seated
Use the rounded end of the spring retrieval hook to gently ease the outer edge of the diaphragm into the
recess in the meter top piece. The meter diaphragm m u s t b e f u l l y s e a t e d a r o u n d i t s e n t i r e
circumference. This can be tested by placing a thumb over the top of the vacuum nipple and gently pulling
the plunger down from the meter top piece. The diaphragm should be sealed air tight and not move
around its outer edge.
Orientate the plunger assembly so that the vacuum bypass hole faces the meter inlet pipe (this ensures
that the vacuum bypass hole is behind the milk inlet shield) and gently place the plunger into the meter
body on the stand allowing the tie rods to pass through the holes in the meter top. Holding the meter by
the top and bottom to ensure it does not come apart, remove it completely from the stand and rotate it
slowly checking alignment of the diaphragm, bottom seal and vacuum bypass hole.
Place the meter back in the stand and replace the top bracket in its original position over two of the tie
rods
Place the three springs over the three tie rod ends
Screw the three flanged nuts onto the three tie rods.
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Innovation In and Out of Parlour
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| Milk Meter Service Manual | v1.2
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