Great-plains PFH-20 Operator Manual User Manual download pdf (Page 10)

Section 1 Assembly and Setup

PH-15, PH-20, PFH-15 and PFH-20 Coulter Command System 148-384M 6/21/2004

Great Plains Mfg., Inc.

Wiring Harness

Refer to Figure 1-5.

1. Route the wiring harness (7) through 8 x 8 inch hitch

tube and to the lift switch at the rear of the machine.

Plug into the lift switch and support the cable with ca-

ble tie mounts (8) and cable ties (9) or strap the cable

to the hydraulic hoses.

2. Plug the 4-pin connector of the wiring harness to sen-

sor box on the depth sensing wheel and support the

cable with cable mounts and ties.

3. Route the 9-pin connector through the spring hose

loop and to the tractor hitch. This will plug into the 9-

pin female connector from the control box extension

cable.

4. Plug the other three short leads into the leads from the

solenoids on the hydraulic control valves (10 and 11)

after they are installed.

Figure 1-5

Lift Switch and Wiring Harness

18430

Lift Switch

Refer to Figure 1-5.

1. Bolt the plunger activated lift switch (1) to the switch

mount located next to the left transport lift cylinder at

rear of the Precision Hitch transport frame with two

#10 x 3/4 inch pan head screws (2), ﬂat washers (3),

lock washers (4) and nuts (5). Do not tighten screws at

this time.

2. Fasten rockshaft switch cam (6) to transport rockshaft

just below the lift switch. Position the cam so it con-

tacts the lift switch when hitch is raised and moves

away from the lift switch when hitch is lowered. Posi-

tion the worm gear screw on the cam mounting band

to the bottom of the rockshaft so it does not interfere

with the lift switch.

3. Adjust lift switch in the slotted holes so the plunger

moves in about 1/8 inch when the cam activates it and

tighten the #10 screws. Do not bottom out the plunger

on the lift switch.

4. Rotate the cam assembly so it hits the plunger when

the hitch is raised just enough to begin to pick the

openers off the ground.

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Great-plains PFH-20 Operator Manual User Manual Page 10

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