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The Yetter Air Compressor converts hydraulic or electric power into compressed air. Yetter Compressor units are durably constructed
and designed for easy integration to operate the Yetter 2940 Air Adjust System. The Yetter Air Compressors build 145psi, the 2940-415
Water Separator/Regulator assembly allows100-120psi of clean, dry air to enter the 2940-103A Control Box & as the operator
commands pressure on the cab controller, the row cleaners adjust on the go with no planting delay or downtime leading to more
planting hours per day. The precise adjustments give the row units & planter a more even ride leading to more accurate seed placement
& seed depth resulting in even emergence. IF USING THE YETTER COMPRESSOR TO SUPPLY AIR TO OPERATE ANOTHER
PNEUMATIC SYSTEM, INSTALL A REGULATOR PRIOR TO AIR ENTERING THAT SYSTEM WITH THE PROPER REGULATED
AIR SETTINGS RECOMMENDED BY THE OEM PRODUCT.
Hydraulic Compressor
- Requires 4 gallons per minute maximum hydraulic flow to operate. 12CFM @ startup, 8.1CFM @ 90psi. 12 gallon storage tank.
- Lubrication of the pump requires a FULL synthetic or PAO synthetic compressor oil. THE PUMP IS SHIPPED EMPTY &
NEEDS OIL BEFORE OPERATING! SEE PAGE 27 FOR FILLING DETAILS!
- Hydraulic oil flow is required to operate the hydraulic compressor's hydraulic motor. Different variables will determine the best
way to connect into a hydraulic circuit to power the hydraulic motor. Connecting directly to a tractor's open SCV port, teeing into
the planter frame lift/lowering circuit, or teeing into the bulk tank blower circuit are examples of supplying hydraulic flow to the
compressor. Check OEM tractor and planter manual for hydraulic GPM output to make sure an adequate source is selected. If
plumbing into a planter circuit, plumb between the tractor SCV and the hydraulic block usually located under the bulk fill tanks.
The planter circuit that is plumbed into must have constant hydraulic flow. PTO DRIVEN AND POWER BEYOND HYDRAULIC
CIRCUITS ARE NOT AN ADEQUATE SOURCE TO OPERATE THE YETTER HYDRAULIC COMPRESSOR!
- Case Drain connection is required to carry the motor case internal leakage directly to the tractor hydraulic reservoir (sump) with zero
pressure. This oil serves to lubricate and cool motor components not directly exposed to the working oil. It is normal to have seepage
from this fitting when disconnected from the tractor to protect the motor seals from thermal expansion. Plumb the case drain so that
hydraulic oil returns to the same reservoir used for the pressure and return. If the tractor is not equipped with a female flat face case
drain coupler, then a Case Drain Kit must be sourced through a dealer or hydraulic supplier. DO NOT PLUMB THE CASE DRAIN
OF THE HYDRAULIC COMPRESSOR INTO A RETURN CIRCUIT!
Electric Compressor
- Uses 12V from tractor battery that has an implemented 80A breaker & 4 gauge power cables. NO MORE THAN 50FT OF POWER CABLES
SHOULD BE USED UNLESS LARGER GAUGE CABLES ARE MADE. Low voltage detection is integrated in the Yetter system.
- 6CFM @ 0psi, 2.6CFM @ 100psi. 12 gallon storage tank.
- OEM ELECTRIC COMPRESSORS ON PLANTERS ARE NOT AN ADEQUATE SOURCE OF AIR TO OPERATE THE
YETTER 2940 AIR ADJUST SYSTEM!
Power Supply
The 2940-103A Control Box uses the tractor's switched power source & battery power. Battery power cables are 8 gauge & a 40A
breaker is implemented. The 2940-153A will need connected to a switched power source. THE CIGARETTE LIGHTER POWER
SOURCE IS NOT A SWITCHED POWER SOURCE AND SHOULD NOT BE USED!
SWITCHED POWER SOURCE CONNECTOR PART #'S: (Connector to the tractor not included)
JOHN DEERE P/N: RE67013
CNH P/N:
187103A1
CAT P/N:
AG233356
The 2940-112A VDM (Valve Drive Module) inside the 2940-103A Control Box uses 12V from the tractor battery.
Fuse Protection
To protect the VDM inside of the 2940-103A Control Box from damage always ensure the integrity of the integrated 40 amp breaker
on the 2940-166 where connected to the tractor battery in case of short or over-circuit. Electric Compressors also use an additional 80
amp breaker. When connected correctly, the tractor has a fuse to protect switched power supply, located in the tractor's fuse panel.
Compressor Maintenence
To prolong the life expectancy of Yetter compressors or OEM hydraulic compressors, clean filter DAILY during use by removing the
element from the filter housing, & tapping it, exposed side down. This will empty the pleats of filter of collected dust. If dust has been
wet or will not clean out, call Yetter to order a new element, part # 2940-549 for hyd. compressors & 2940-395 for electric compressors,
or if using an OEM hydraulic compressor, call your local dealer. You may lightly blow out the compressor housing using a blow gun,
however, DO NOT blow out filter element. The housing and filter should be cleaned DAILY during field operation, or more if conditions
are very dusty. Hydraulic compressors create a good amount of moisture & should be drained on a daily basis when in use. See pages
55 – 56 for further maintenance.
Introduction
System Requirements
11
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