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3. Operation
Install the meter door.
11.
3.9.4 Meter roll options
Four meter roll options are available:
• The high capacity roll has eight 12.7 mm (1/2 in) deep bars and is used for most applications.
• The medium capacity roll has 12 6.4 mm (1/4 in) deep bars and is used on smaller machines or for
lower seeding or fertilizer rates.
• The low volume roll has a pattern of short, shallow depressions to gradually longer, deeper depressions
for very low seeding rate.
• The fine product meter roll has a continuous pattern of shallow depressions for very low seeding rates
with high accuracy.
3.9.5 Meter adjustments
The following adjustments are done at the factory and done only be done by a trained service technician.
3.9.5.1 Shims
The meter roll has a 0.762 mm (0.030 in) gap
between the roll and the meter housing for correct
operation. If the gap is too large product can leak
around the meter roll into the air stream. If the gap
is too tight the meter roll will not move on the
housing and cause problems with the meter drive
system.
A 0.762 mm (0.030 in) thick shim can be installed
between the meter roll and the meter housing to
reduce this gap. The meter shaft must be removed
to install this shim. See the information for
changing meter rolls.
Make sure the meter roll turns freely after
installing or removing any shims. If the meter roll
does not turn freely, do not operate the air system
until enough shims have been removed to let the
meter roll turn freely.
3.9.5.2 Deflector block
The deflector block (1) at the rear of the meter
prevents seed from flowing around the back side
of the meter roll. If necessary, vertically adjust the
deflector block to increase or decrease the
clearance to the meter roll.
To adjust the deflector block:
1. Loosen the two nuts (2) on the back side of the
meter housing.
2. Move the deflector block to the desired
position.
3. Tighten the two nuts on the back side of the
meter housing.
Fig. 16
Fig. 17
63
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Troubleshooting
