Yetter Systems One Seed Jet II User manual

SYSTEMS ONE
SEED JET II 
CLOSED CENTER HYDRAULIC SYSTEM
OPERATORS MANUAL
&
PARTS IDENTIFICATION
YETTER MANUFACTURING CO.
FOUNDED 1930
Colchester, IL 62326-0358
Toll free: 800/447-5777
309/776-3222 (Fax)
Website: WWW.YETTERCO.COM
E-mail: [email protected]

2
FOREWORD
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
Product.
We hope your new Yetter implement will help you
achieve both increased productivity and increased
efficiency so that you may generate more profit.
This operator’s manual has been designed into six
major sections.
Foreword, Safety Precautions, assembly
instructions, Operation, parts identification and
troubleshooting.
It is important the owner/operator knows the
implement model number and serial number.
Write the serial and model number in the space
provided and use it in all correspondence when
referring to the implement.
Throughout the manual references may be made
to left side and right side. These terms are used
as viewed from the operator’s seat facing the front
of the tractor.
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, reference information and other
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 that are
covered by the warranty policy.
If you are unable to understand or follow
the instructions provided in the
publication, consult you local Yetter
dealer or contact:
YETTER MANUFACTURING CO.
309/776-4111
800/447-5777
309/776-3222 (FAX)
Website: www.yetterco.com
E-mail: [email protected]
WARRANTY POLICY
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 will 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.
Model Number:_________________________
Dealer :___________________
T
Yetter Manufacturing warrants its own products only and cannot be responsible for damage to
equipment on which mounted.

3
TRACTOR PREPARATION
CLOSED CENTER HYDRAULIC SYSTEM
TRACTOR HYDRAULIC SYSTEM REQUIREMENTS
For proper operation your tractor hydraulic system must be able to pump 12 gallons per minute at a pressure of 1000 psi.
The speed of the blower depends upon the hydraulic capability of the tractor it is attached to.
Hydraulic remote outlet for blower drive motor
The control lever for the outlet will need to be held in a continuous flow position (closed center system). A selective
control valve lever stop must be used to avoid damaging the hydraulic motor seals when shutting off hydraulic oil flow. To
shut off blower motor move lever forward into float position. If your tractor has a load sensing system “detent”, you should
adjust it for operation above 1000 psi. See your tractor operator’s manual for instructions on how to adjust the “detent”.
The hydraulic motor return line (3/4” not supplied) must be plumbed directly to the tractor oil reserve at a back
pressure of 0 psi. If the back pressure exceeds 50 psi. the seals in the hydraulic motor will fail and may damage the
motor. Consult your tractor manual or dealer for parts required and installation. NOTE: A quick coupler can be used on
the return line, but it must be a full flow non-restricted coupler such as used air/vacuum planter with tractor hydraulic
operated blower motor.
TRACTOR ELECTRICAL REQUIREMENTS
Electrical-minimum 10 amps @ 12 volts surging to 20 amps max.
12-14 ga. wire
connect wire to the 1300-614 solenoid box on the airlock using (2) 2570-612 butt connector 12 ga.

4
SET UP
Add oil to blower gear case. DO NOT OVERFILL
Use non-detergent, high quality hydraulic or SAE 20 weight.
1. Attach the power unit to the frame.
2. Plumb hydraulic hoses.
A. Connections are tight and no leaks.
3. Plumb air hoses.
A. Check all connections for no air loss/leaks.
4. Install electrical wire.
A. Check all electrical connections are tight and wires in good condition.

5
MAINTENANCE
CAUTION: Never clean, lubricate or adjust a machine that is in motion.
Failure to heed may result in serious personal injury or death!
DANGER: Inspect and replace worn or frayed hydraulic hoses. Keep all
connections tight. Escaping hydraulic fluid under pressure can have
sufficient force to penetrate skin and cause personal serious injury or death. Fluid
escaping from a small hole can be almost invisible. Use a piece of cardboard or
wood rather that your hands to search for leaks.
- Inspect daily the air inlet screen on the blower intake, clean or replace as
required.
- Inspect daily and re-tighten as required all bolt on the power unit and airlock.
- Inspect daily and repair as required all air hoses, hydraulic hoses, fittings
and/or electrical wires.
- After season, coat internals of blower cylinder with nox-rust No. VCI10 or
equivalent and cap or seal to avoid evaporation. Repeat after each season
of use or if the Seed Jet will not be used again for more than a month except
if atmospheric conditions producing rapid corrosion, the blower should be
protected immediately.
- After season, clean and inspect airlock, remove any dirt, debris, seed and or
seed treatments, paint the airlock vanes and the inside exposed surfaces of
the airlock housing with nox-rust X-110 or equivalent. Seal the inlet and
discharge openings with tape, if any part is left open to the atmosphere it will
corrode. Prior to startup, remove tape and inspect internals to insure
absence of rust. After this, turn the drive shaft be hand to make sure that
the vanes turn freely at all points. Then connect the air piping to the inlet
and discharge connections.

7
OPERATION
CLOSED CENTER HYDRAULIC SYSTEM
Tractor – Preparing The Hydraulics
Do Not allow dust, dirt or other contaminants to get into the hydraulic system
during installation. Prepare a remote hydraulic connecting point and be sure flow
control is operational. Review operation of the detent position of the hydraulic
control lever for the selected remote hydraulics. Service the hydraulic system as
to filtration and cooling, top up the oil level in the hydraulic reservoir.
NOTE: Most tractors are NOT equipped with return line plumbing from the hitch
point to the hydraulic oil reservoir. Always follow tractor manufactures
recommendations for suggested installation procedures for a 0 psi. return line.
Connecting Hydraulic Lines To Tractor
- Pressure detent valve must be in “float” position with tractor engine shut
off before connecting lines.
IMPORTANT: Always hook up return lines first.
Disconnecting Hydraulic Lines From Tractor
- Pressure detent valve must be in “float” position with tractor engine shut
off before disconnecting lines.
IMPORTANT: Always disconnect pressure lines first.
NOTICE: Always disconnect hoses and wires when unhitching.
CHECK HYDRAULIC CONNECTIONS
IMPORTANT: Damage to the blower motor may occur if hydraulic hoses are
assembled incorrectly. Check the following hydraulic connection before
operating the blower motor.

8
OPERATION
CLOSED CENTER HYDRAULIC SYSTEM
Operation of the Seed Jet hydraulic system requires continuous hydraulic oil flow. A selective
control valve lever stop must be used to avoid damaging the pump motor seals when shutting
off hydraulic oil flow. The stop will prevent the selective control valve lever from returning to the
neutral position. Install SCV lever stop in tractor console before operating Seed Jet system.
Only operate the Seed Jet hydraulic system with the SCV lever lock installed. The blower motor
will operate when SCV lever is in forward “detent” position. To shut off pump motor, move lever
forward into “float” position.
IMPORTANT: DO NOT return SCV lever to “neutral” position to shut off the blower.
HOW TO TRANSFER SEED:
1. Allow the tractor hydraulic oil to warm up.
2. Move SCV lever to “detent” position – this will start the blower turning and will force air
through the hoses out to the cyclone seed discharge.
3. Open the slide gate on the airlock to allow seed to flow into the top of airlock.
NOTE: DO NOT overload the system with too much seed.
4. While securely holding onto the cyclone, move the electrical toggle switch to the “on”
position. Momentarily see will start flowing out of the bottom of the cyclone and into the
seed hopper.
5. To stop seed flow, turn the toggle switch to the “off” position.
NOTE: Seed will continue to flow until the discharge hose is emptied of seed. Turn off
the toggle switch before the seed hopper is full.
6. Turning the electrical toggle switch on and off controls the operation of the 12 volt DC
motor on the airlock/ hopper assembly.
7. Once the seed has been transferred and stopped flowing from the cyclone, move the
SCV lever to the ”float” position to stop the blower.

10
PARTS IDENTIFICATION

11
PARTS IDENTIFICATION

12
TROUBLESHOOTING
Problem
Hydraulic motor will not run.
Oil leakage at the fan motor.
Oil showing up on hydraulic lines.
Hydraulic motor slow.
Cause
Pressure hose in return outlet.
Hydraulic check valves backwards.
Insufficient tractor hydraulic
pressure.
Incorrect hydraulic connections.
SCV lever stop not installed.
SCV lever stop cut to wrong length.
Tractor SCV linkage is mistimed.
“Flow Checking” at SCV prevents
return oil flow-50 Series tractors.
Control valve failed.
Tractor oil level low.
Faulty fan motor.
Hydraulic hose fittings not tight.
Motor bolts not tight.
Faulty fan motor shaft seal.
Faulty fan motor.
Return line not connected.
Shaft seal failure on hydraulic
motor seal.
Tractor is not putting out adequate
oil.
Hydraulic motor malfunction.
Tractor hydraulic valve not retained
in detent position.
Solution
Switch pressure & return hoses.
Check and install correctly.
Repair tractor.
Reconnect hoses.
Install lever stop in tractor console.
Re-cut lever stop.
Tractor SCV linkage must be
readjusted.
Install auxiliary return line coupler
kit in SCV.
Replace control valve.
Add oil.
Repair motor.
Apply thread sealant and tighten.
Tighten motor bolts.
See your dealer. Some wetness is
expected.
Return for service. See your dealer.
Connect return line, replace motor
seal.
Replace seal. WARNING: DO NOT
DISASSEMBLE HYDRAULIC
MOTOR!! THE SHAFT SEAL IS AN
EXTERNAL REPLACEMENT ITEM.
Have tractor dealer inspect tractor
hydraulics. Bad couplers. Check
couplers on tractor and hoses. Try
different couplers.
Repair or replace motor.
Adjust valve detent.

13
TROUBLESHOOTING
Problem
Blower speed is uneven.
Hydraulic oil is too hot.
Hydraulic control lever in tractor
not holding detent position.
No seed being transferred.
Airlock will not turn.
Cause
Operating with open center
hydraulic system.
Tractor oil filters are plugging.
Low hydraulic fluid level in
tractor.
Faulty flow control valve.
Insufficient oil cooling.
Plugged cooling radiator.
Cooling radiator is too small.
No cooling radiator.
Oil reservoir is too small.
Oil bypass rate is very high.
Low hydraulic fluid level in the
tractor.
Hydraulic line pressure exceeds
the detent setting.
Pressure spikes in the hydraulic
system.
Faulty detent mechanism.
Seed gate closed.
Tractor oil cold.
Seed hose plugged.
Low power to electric motor.
Airlock vane blocked.
Faulty electric motor.
Module switch open.
Poor or damaged wiring.
Blown fuse.
Module switch out of adjustment.
Faulty remote switch.
Failed module.
Solution
Recommend closed center or
load sensing system.
Service tractor hydraulic filters.
Maintain adequate oil levels.
Service tractor hydraulic system.
Review fan drive requirements.
Clear radiator cooling fins.
Increase cooling capacity.
Add cooling capacity.
Increase reservoir size.
Reduce bypass rate. Increase
fan speed.
Maintain adequate oil levels.
Hold the lever to maintain
operating position.
Operate selector and spool
valves gently.
Service as required.
Open gate.
Run tractor to warn oil.
Disconnect hose and clear.
Check wiring connections.
Check battery voltage.
Remove blockage. Example: wet
seed.
Test/Replace electric motor.
Blower not running.
Inspect and repair motor module
and switch wiring and
connections.
Module fuses.
Adjust so switch is open when
blower not running. Closed when
blower is running.
Replace remote switch.
Replace relay or module.

15
Our name
Is getting known
Just a few years ago, Yetter products were sold primarily to the
Midwest only. Then we embarked on a program of expansion and
moved into the East, the South, the West and now north into Canada.
We’re even getting orders from as far away as Australia and Africa.
So, when you buy Yetter products . . .you’re buying a name that’s
recognized. A name that’s known and respected. A name that’s
become a part of American agriculture and has become synonymous
with quality and satisfaction in the field of conservation tillage.
Thank you.
YETTER MANUFACTURING CO.
Colchester, IL 62326-0358 •309/776-4111
Toll Free 800/447-5777
Fax [phone]
Website: www.yetterco.com
E-mail: [email protected]
2565-491 •12/04 •