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FILLING THE HOPPER TANK (BIN)
FILLING THE HOPPER TANK (BIN) Dry DuraPlacer 9 / 13 / 14 Ton - 40' / 60' Page 47
Air Pressure Adjustment
See your specific tank’s Manufacturer-
specific Documentation for adjusting system
air pressure.
General guidelines are provided below.
Air pressure is controlled by the hydraulic
flow from the tractor to the unit. Ensure
proper hydraulic flow and pressure are
present before continuing with the
adjustment. Check Hydraulic System
Requirements .
When determining air pressure needed for
each product and rate, start on the high
range and lower to appropriate level.
IMPORTANT: Too much air causes
premature wear on air hoses, can
cause product bridging, and requires
more power. Not enough air will cause
product blockage and damaged shear
couplers.
Each application will vary depending on the
use case. Some of the variables that affect
the air pressure are flat rate versus
prescription (range of rates), ground speed,
number of row units, toolbar width, if splitters
are used, density of the product, and hose
routing.
Generally, the highest air pressure needed is
21 inches of water column (w.c.) down to 12
w.c. Most applications require air pressure
somewhere in the middle. A good test is to
start with a high pressure (20 w.c.) and start
applying the highest rate and highest ground
speed you will be operating at.
Ground Appl. Rate
(lbs./acre)
Air Pressure (w.c.)
≤150 12-15
>150 15-21
After a couple of rounds, start turning your air
pressure down, and turn it down until you
start seeing the product pulsing in the hoses.
It will look like mice running through the
hoses. When this happens plugging can
occur, so look at your air pressure reading
and turn your air pressure up 1 to 2 w.c.
higher. The product pulsing should go away,
and the machine should be set for peak
performance. If product or rates are
changed, this air pressure should be
monitored.