Great-plains PFH-20 Operator Manual User Manual download pdf (Page 17)

Section 2 Operating Instructions

6/21/2004

PH-15, PH-20, PFH-15 and PFH-20 Coulter Command System 148-384M

Great Plains Mfg., Inc.

position to supply oil to the "P" port of the hydraulic control

valve, regardless of whether you want to control the

tongue hydraulic cylinder manually or automatically.

The Precision Hitch transport hydraulic circuit contains the

hoses from the ports marked "V1" and "V2". This circuit

must be connected to one of the remaining circuits for rais-

ing and lowering the transport system. This circuit must re-

ceive hydraulic pressure for raising the machine even

while the hydraulic tongue circuit is "locked in" for continu-

ous use. If the machine will not raise when the hydraulic

tongue circuit is "locked in," consult your tractor dealer.

You may need to run the transport hydraulic circuit on a

"priority circuit" and the hydraulic tongue circuit on an al-

ternate remote if thetractor hydraulics allows live hydraulic

power to other remotes. If the "priority circuit" is the only

circuit suitable for HYDRAULIC MOTOR CONTROL, then

run the transport hydraulic circuit on the "priority circuit"

and run the hydraulic tongue circuit on an alternate remote

with the Coulter Command valve in the OPEN CENTER

MODE.

Tractors with open center hydraulic systems or ﬁxed

displacement hydraulic pumps.

(If you are not familiar with your tractor's hydraulics, con-

sult your tractor dealer.)

For tractors with open-center hydraulics or on tractors with

ﬁxed displacement hydraulic pumps turn the knurled con-

trol knob on the left side of the hydraulic valve completely

counterclockwise and lock it in place with the circular lock

disk. Be sure the lock disk is snugged to prevent the con-

trol knob from vibrating loose in ﬁeld operation.

The Precision Hitch transport hydraulic circuit contains the

hoses from the ports marked "V1" and "V2". This circuit

must be connected to tractor's "priority circuit" to supply

hydraulic pressure for raising the machine even while the

hydraulic tongue circuit is "locked in" for continuous use.

The "No.1" hydraulic circuit on most open-center tractors

is the priority circuit.

The tongue cylinder hydraulic circuit consists of the hoses

from ports "P" and "T". Connect "P" and "T" to a circuit oth-

er than the "priority circuit". Once the hydraulic valve is set

for OPEN CENTER operation, the Coulter Command

tongue cylinder circuit requires live hydraulic power sup-

plied to the port labeled "P". This is accomplished by push-

ing FORWARD on the tractor remote hydraulic lever and

LOCKING IT OPEN in this position. The remote tractor hy-

draulic lever will have to be locked in position to supply oil

to the "P" port of the hydraulic control valve, regardless of

whether you want to control the tongue hydraulic cylinder

manually or automatically.

The Coulter Command tongue hydraulic circuit requires a

ﬂow rate of 8 to 12 gallons per minute for efﬁcient opera-

tion. On high ﬂow rate tractors, turn down the ﬂow rate on

the tractor remote, if possible, so as not to exceed 12 gal-

lons per minute. Flow rates higher than 12 gallons per

minute will increase the heat generated by the Coulter

Command circuit when it circulates this high ﬂow of oil.

When operating the Coulter Command tongue hydraulic

circuit in the OPEN CENTER mode, use poppet style

quick couplers on the hoses connecting to the tractor.

These quick couplers allow better ﬂow through some trac-

tor remotes and may produce less heat when circulating

continuous hydraulic ﬂow through them. Parker Hanniﬁn

offers the poppet style Pioneer quick coupler in their 8010

Series couplers. For tractors with Pioneer quick couplers

use Pioneer 8010-4P poppet style male couplers when

operating in the OPEN CENTER mode. See Figure 2-2.

Figure 2-2

Quick Couplers

Operation of Electronic Controls

1. Connect power cord to an uninterrupted, 12-volt pow-

er source on tractor. Connecting directly to battery is

recommended. Plug cord into lead with two-pin con-

nector on back of control box. The polarity of the pow-

er supply is very important to prevent circuit damage.

The white wire of the power cord must be connected

to the "+" positive battery terminal and the black wire

to the "-" negative battery terminal.

2. Connect the control box cable to the back of the con-

trol box and route it out of the tractor. Connect it to the

hitch wiring harness.

3. With the remote tractor hydraulic lever locked in posi-

tion to supply oil to the "P" port of the hydraulic control

valve, turn the power switch on.

a. For manual tongue hydraulic cylinder operation,

simply move the UP-DOWN switch the desired di-

rection. Moving the switch to the UP position ex-

tends the tongue cylinder, and moving the switch

to the DOWN position retracts the tongue cylin-

der. If UP retracts the cylinder, then your remote

hydraulic lever is not supplying oil to the "P" port of

the hydraulic control valve, or the wires going to

the solenoids are reversed. By moving the UP-

DOWN switch, the AUTO-MANUAL switch auto-

matically switches to the MANUAL mode. If you

want to manually hold the tongue hydraulic cylin-

der in the position set by the automatic controls

without moving it, just switch the AUTO-MANUAL

switch to MANUAL.

b. For automatic coulter depth control, simply switch

the AUTO-MANUAL switch to AUTO and dial in

the desired coulter depth you wish to maintain

with the coulter depth control knob. (The markings

on the knob settings are for reference only and do

not represent a depth measurement.)

Poppet Style Ball Style

16316

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 25 26

Comments to this Manuals

No comments

Great-plains PFH-20 Operator Manual User Manual Page 17

Comments to this Manuals

Related products and manuals for Gardening equipment Great-plains PFH-20 Operator Manual