GREAT PLAINS BD7600 현장 조정 매뉴얼 - 페이지 6

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Opener Center Hydraulic (Non-Active Hydraulic

System) Instructions:

1) Lower the opener frames and lock the tractor

hydraulic lever forward temporarily while adjusting

opener down-pressure.

2) Release the lock disk (1). Set the down-pressure

with the adjustment knob (2) while watching the pres-

sure gauge until the gauge shows the desired pres-

sure. Turn clockwise to increase pressure and

counterclockwise to decrease pressure.

3) When the pressure is set, lock the knob with the

locking disk.

4) After opener down-pressure is set, return the trac-

tor hydraulic lever to neutral. This locks in the

selected pressure and opener frames remain fixed in

this position.

Note: Open center tractors and tractors with fixed-dis-

placement pumps are not designed to provide a con-

tinuous supply of pressurized oil to remote valve.

Locking the hydraulic lever forward on these tractors

can cause overheating of hydraulic oil and tractor

damage.

During Field Operation:

1) Each time the openers are lowered, hold the tractor

remote hydraulic lever forward for a few seconds to

recharge the circuit, then return it to neutral position.

The tractor and drill should be on level ground when

returning lever to neutral.

2) When approaching rough terrain where you need

active hydraulics to maintain even opener penetra-

tion, move the tractor hydraulic lever forward momen-

tarily. When you return to level ground move the lever

to neutral.

Note: Do not activate the tractor hydraulic

lever for more than 20 seconds at any given time.

Opener Adjustments:

Openers provide the best results when the opener

body is parallel with the ground.

1) If the openers are too high in the front, increase

hydraulic pressure, and/or lengthen the opener

springs. Check the opener frame pivot in use at high

pressures.

2) If the openers are too low in the front or are bulldoz-

ing, as shown to the right, decrease the hydraulic

pressure and/or shorten the opener springs.

Document

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