BENCH INDUSTRIES 35472-2A User manual
Air Screen Machine
OWNER’S MANUAL
Manufactured in the U.S.A.
P.O. Box 3167 ~ Great Falls, MT 59403
Phone ~ 406.727.6514 ~ Toll ~ 1.800.977.6514
Web site ~ www.benchindustries.com ~ E-mail ~ brian@benchindustries.com
Serial Number _____________
INTRODUCTION
You have purchased one of the finest air screen machines on the market today.
These cleaners are a culmination of cleaning principles over a century old in
combination with all of today’s technology.
From the base model to custom designed Air Screen Machines, any separation is
Possible, with the utmost precision and 0% damage to your crop.
We use tubular steel frames and either steel or wood shoes. All components are
Easily interchanged and all pulleys and bearings are standard and can be
Purchased locally.
Some applications of the Bench Air Screen Machine are: seed plants, rice cleaning,
Cereal grains, pinto beans, peas, beet pulp, corn pellets, and all other applications
Where aspiration and sizing is needed.
In the following Set-up, Start-up, Installation, and Maintenance we provide
explanations, suggestions, and remedies to most circumstances. Should you
have additional concerns, please contact us for assistance at Bench Industries,
PO Box 3167, Great Falls, MT 59403, 406.727.6514 or e-mail us at
SETTING UP THE MACHINE
All Bench Air Screen Machines have been pre-run at the factory, but even so, once
you have received your Bench Air Screen Machine you should check for any
loosened components due to shipping.
The standard Bench Air Screen Machine, Model 35472-2A is a single shoe machine
Designed to be attached to a concrete floor or pad. If you have an unstable
Surface, a counterbalance will be required.
All bearings should be checked for grease and screen hold downs should be checked
For tension. Also set the in-feed in low position and air setting closed for start-up.
The fan is designed to mount remote usually mounting on the outside of the
Facility, or in case of a mobile unit, can be mounted off the cleaner with
Framework. Make certain air controls are open and closed as indicated on side of
Machine. (Refer to Figure 4)
The machine must be level and securely bolted down.
START-UP
Now that you are ready to operate your Bench Air Screen Machine, for your
ease, we recommend the following:
The intake hopper is designed to be fed with a spout or auger. If you gravity feed
the machine for an overhead bin directly, a hogs back must be installed in the field
to prevent excess weight on the feeder pan. The fan rotation needs to be checked
and make sure you have no restrictions in the air system.
Start the machine without any product and let it run for at least 15 minutes.
This will allow you to check for noise of loose components and to examine your
installation. Once you start product feeding into the machine start with a small
amount and slowly increase the feed.
MAINTENANCE
The bearings should be greased moderately and often, but with very small
augments. All bolts and set-screws should be checked often when first running
the machine.
If any excessive noise occurs, your machine should be shut down and inspected for
loosened parts or push-rod arms.
You should make sure the shoes are always shaking straight back and forth with
no side to side movement present. Any side-to-side movement means loose
rush rods or worn bearing and must be remedied immediately to prevent
damage to our machine.
The balls in the ball deck should be checked periodically for resilience. They should
Return at least 2/3rd when dropped on a hard surface.
PRODUCT IN-FEED
Product is metered into the Bench Air Screen Machine by way of a vibrating pan. The level is
preset at the factory, but may require some fine tuning at start-up. The level of the pan is ad-
justable through the access door at the front of the machine. There are 2 Nylock nuts that can
be raised or lowered. The volume control is mounted on the side and is easily controlled with
a hand crank. If excess weight is put on the vibratory pan, cranking will become difficult and
possibly damage the components. Should excess weight be a factor, a hogs back may need to
be installed. Variables of speed, shoe shakes, and screen sizes will all determine the volume
flowing through the machine and will impact you desired final result. Begin with a slow rate
and increase until desired capacity with quality is achieved. Do not overload the screen decks
or damage may occur.
AIR CONTROLS
Air separation on the Bench Air Screen Machine is controlled by air baffles inside the ma-
chine’s air chambers. Before the air system is sealed, check to make sure the set-screws are
tight and the baffles are in the proper setting as indicated on the handle setting. When start-
ing the product through the machine, set air on the low setting (closed) and increase slowly.
The product will then begin discharging from air settings auger under the air control settings.
Slowly change each setting until you obtain the desired result on both discharge augers. Af-
ter changing the settings, you will need to wait several minutes before actual results are no-
ticed. Air settings augers must be sealed and discharge doors free floating.
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