Yetter 2940-055 User Manual

2940-106

HYDRAULIC COMPRESSOR

2565-779  03/2014

YETTER MANUFACTURING CO.

FOUNDED 1930

Colchester, IL 62326-0358
Toll free: 800/447-5777
309/776-3222 (Fax)
Website: www.yetterco.com
E-mail: [e-mail]

FOREWARD

You’ve just joined an exclusive but rapidly growing club.

For our part, we want to welcome you to the group and thank you for buying a Yetter product.

We hope your new Yetter products will help you achieve both goals-increase your productivity and increase
your efficiency so that you may generate more profit.

This operator’s manual has been designed into four major sections: Foreword, Safety Precautions,
Installation Instructions and Parts Breakdown.

This SAFETY ALERT SYMBOL indicates important safety messages in the manual. When you

see this symbol, be alert to the possibility of PERSONAL INJURY and carefully read the

message that follows.

The word NOTE is used to convey information that is out of context with the manual text. It contains special
information such as specifications, techniques and reference information of a supplementary nature.

The word IMPORTANT is used in the text when immediate damage will occur to the machine due to
improper technique or operation. Important will apply to the same information as specified by note only of
an immediate and urgent nature.

It is the responsibility of the user to read the operator’s manual and comply with the safe and correct
operating procedure and to lubricate and maintain the product according to the maintenance schedule in
the operator’s manual.

The user is responsible for inspecting his machine and for having parts repaired or replaced when
continued use of the product would cause damage or excessive wear to the other parts.

It is the user’s responsibility to deliver his machine to the Yetter dealer who sold him the product for service
or replacement of defective parts, which are covered by the warranty policy.

If you are unable to understand or follow the instructions provided in this publication, consult your local
Yetter dealer or contact:

YETTER MANUFACTURING CO.

309/776-4111
800/447-5777

309/776-3222 (FAX)
Website: www.yetterco.com
E-mail: [e-mail]

WARRANTY

Yetter Manufacturing warrants all products manufactured and sold by it against defects in material. This
warranty being expressly limited to replacement at the factory of such parts or products as shall appear to
be defective after inspection. This warranty does not obligate the Company to bear cost of labor in
replacement of parts. It is the policy of the Company to make improvements without incurring obligations to
add them to any unit already sold. No warranty is made or authorized to be made, other than herein set
forth. This warranty is in effect for one year after purchase.

DEALER: ________________________________________

Yetter Manufacturing warrants its own products only and cannot be responsible for damages to
equipment on which mounted.

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SAFETY

A brief description of signal words that may be used in this manual:

CAUTION:

practices.

Used as a general reminder of good safety practices or to direct attention to unsafe

WARNING:

Denotes a specific potential hazard.

DANGER:

You can make your farm a safer place to live and work if you observe the safety precautions given. Study
these precautions carefully and insist that those working with you and for you follow them.

Finally, remember this: an accident is usually caused by someone’s carelessness, neglect or oversight.

Denotes the most serious specific potential hazard.

SAFETY PRECAUTIONS

WARNING

Never clean, lubricate or adjust a machine that is in motion. Always lower or block the implement before
performing service.

If the machine must be serviced in the raised position, jack or block it up to prevent it from accidentally
falling and injuring someone.

Do not allow riders on the tractor or implement.

Use speeds and caution dictated by the terrain being traversed. Do not operate on any slope steep
enough to cause tipping or loss of control.

Be sure all personnel are clear of the immediate area before operating.

Read and understand the operator’s manual and require all other persons who will operate the equipment
to do the same.

Be familiar with all tractors and implement controls and be prepared to stop engine and implements
quickly in an emergency.

CAUTION

Consult your implement and tractor operator’s manual for correct and safe operating practices.

Beware of towed implement width and allow safe clearance.

This product contains pressurized lines and bags, rotating parts, high temperature parts, and sharp
edges. Use extreme caution when working with each condition.

FAILURE TO HEED MAY RESULT IN PERSONAL INJURY OR DEATH.

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INTRODUCTION

The Yetter 2940-106 Hydraulic Air Compressor converts hydraulic power into compressed air.
Yetter Hydraulic Compressor units are durably constructed and designed for easy integration to
operate the Yetter 2940 Air Adjust System. IF USING THIS COMPRESSOR TO SUPPLY AIR

TO OPERATE ANOTHER SYSTEM, INSTALL A REGULATOR PRIOR TO AIR ENTERING
THAT SYSTEM WITH PROPER REGULATED AIR SETTINGS RECOMMENDED BY OEM
PRODUCT.

SYSTEM REQUIREMENTS:

-The 2940-106 Hydraulic Air Compressor requires 4 gallons per minute maximum
hydraulic flow to operate.

-Lubrication of the pump requires a Grade 111 synthetic or a PAO synthetic compressor
oil. THE PUMP IS SHIPPED EMPTY AND NEEDS OIL BEFORE OPERATING!!!

-Hydraulic oil flow is required to operate the 2940-106 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 SCV, teeing into the planter frame
lift/lowering circuit, or teeing into the bulk tank blower circuit are ways of powering the
compressor. Check OEM tractor and planter manual for hydraulic gpm output to make sure
an adequate source is selected.

-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. If the tractor is not equipped with a female flat face case drain
coupler, then one must be sourced through a dealer or hydraulic supplier.

TABLE OF CONTENTS

FORWARD…………………………………………………………………….2
SAFETY………………………………………………………………………..3
INTRODUCTION AND SYSTEM REQUIREMENTS…….……………….4
BOLT TORQUE……………………………………………………………….5
EXTERNAL DIAGRAM…………………………………………………….6-7
HYDRAULIC FITTINGS CHART………………………………….…...……8

QUICK START GUIDE………………………………………………………9
COMPRESSOR INSTALLATION GUIDE………………………………..10
HYDRAULIC CONNECTION GUIDE…………………………………11-12
COMMUNICATION HARNESS INSTALLATION GUIDE………………13
PLUMBING AIR LINE GUIDE …………………………………………….14

HARNESS AND PLUMBING DIAGRAM………………………………….15

MAINTENANCE………………………………………………………….16-17

PART IDENTIFICATION………………………………………………..18-23

TROUBLESHOOTING………………………………………………………24

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Mounting bolts and hardware

BOLT TORQUE

Before operating the Yetter Hydraulic Compressor for the first time, check to be sure that all hardware is
tight. Check all hardware again after approximately 50 hours of operation and at the beginning of each
planting season.

All hardware used on the Yetter Hydraulic Compressor is Grade 5 unless otherwise noted. Grade 5 cap
screws are marked with three radial lines on the head. If hardware must be replaced, be sure to replace
it with hardware of equal size, strength and thread type. Refer to the torque values chart when tightening
hardware.

Important: Over tightening hardware can cause as much damage as when under
tightening. Tightening hardware beyond the recommended range can reduce its shock load
capacity.

The chart below is a guide for proper torque. Use it unless a specified torque is called out
elsewhere in the manual. Torque is the force you apply to the wrench handle or the cheater
bar, times the length of the handle or bar. Use a torque wrench whenever possible.

The following table shows torque in ft. lbs. for coarse thread hardware.

Lubricate all bearings and moving parts as assembled and make certain that they work freely.

WARNING: Never work around the toolbar/implement while in a raised position without using
safety lockups.

CAUTION: The Residue manager attachments are very heavy. Pay extra attention to lifting
techniques while handling and or maneuvering the opener during assembly. Failure to do so
may lead to personal injury.

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EXTERNAL DIAGRAM

Item Description QTY

A Air Filter 1

B Compressor Pressure Air Line 1

C Output Elbow Fitting 1

D Tank Pressure Gauge 1

E Tank, 12 GAL 1

F Pressure Relief Valve 1

G Pressure Switch Connector 1

H Pressure Switch 1

I Hydraulic Return to Tank Port -8 ORFS 1

J Hydraulic Pressure Inlet Port -6 ORFS 1

K Hydraulic Control Block 1

L Flow Control Valve 1

M Hydraulic On/Off valve 1

N Tank Drain (valve not shown) 1

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EXTERNAL DIAGRAM

Item Description QTY

A Hydraulic On/Off Valve 1
B Check Valve 1
C Hydraulic Control Block 1
D Return to Tank Hose 1
E Inlet hose 1

F Case Drain Port -6 ORFS 1
G Hydraulic motor 1
H Housing Assembly 1

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Hydraulic Fittings Identification Chart

-Due to common threads, mismatching can happen and could result in leaks and pressure loss

-Be sure to verify which style and use dash sizes when ordering replacement parts

-NPTF is easily recognizable and looks like regular pipe threads. It is not recommended for hydraulic systems

but does exist on some agriculture equipment

-SAE ORB is recommended by the NFPA for optimal leakage control in medium and high pressure hydraulic systems.
The male fitting has a straight thread and O-ring. The female port has a straight thread, a machined surface (minimum

spotface) and a chamfer to accept the O-ring. The seal takes place by compressing the O-ring in the chamfer. The
threads hold the connection mechanically.

-JIC 37 Degree Flare fittings have a 37° cone seat on the female adapter and a 37° flare on the male adapter. This cone
seat and flare allows for a complete mechanical seal between the male and female fitting. Teflon tape on threads is not

required.

-ORFS (O-Ring Face Seal) adapter fittings use a straight thread and have a machined groove in the face of the male
fitting to accept the O-ring. This O-ring is compressed against the flat face of the female fitting for a leak proof

connection. ORFS are one of the newest types of hydraulic fittings.

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