CLOSED CENTER HYDRAULIC SYSTEM

SETUP MANUAL

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]

1

2

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.

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.

3

MAINTENANCE

4

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.

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.

OPERATION

5

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.

PARTS IDENTIFICATION

6

7

PARTS IDENTIFICATION

8

Problem

Hydraulic motor will not run.

Oil leakage at the fan motor.

Oil showing up on hydraulic lines.

Hydraulic motor slow.

TROUBLESHOOTING

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 S 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.

TROUBLESHOOTING

9

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.

10

NOTES:

11

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 309/776-3222

Website: www.yetterco.com

E-mail: [email protected]

2565-491

12/03 Great River Printing, Hamilton, IL

12