Great Plains 2S-2600F Operator Manual v2 - Manual (Page 13)

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Section 1 Preparation and Setup
9/26/13 2S-2600 and 2S-2600F Two-Section Folding Drill 195-200M-A
Great Plains Mfg., Inc.
Bleeding the Hydraulics
To function properly, the hydraulics must be free of air. If
hydraulics have not been bled, they will operate with
jerky, uneven motions and could cause wings to drop
rapidly during folding or unfolding. If hydraulics were not
bled during initial implement setup or if you replace a
part in hydraulic system during the life of the drill, com-
plete the following procedures.
Raising openers on unfolded, unhitched drill will cause drill
tongue to rise suddenly, which could cause serious injury or
death. Be certain that drill is hitched securely to your tractor
drawbar and the safety chain is securely attached to tractor
before raising openers and unfolding drill.
Escaping fluid under pressure can penetrate the skin causing
serious injury. Avoid the hazard by relieving pressure before
disconnecting hydraulic lines. Use a piece of paper or card-
board, NOT BODY PARTS, to check for suspected leaks. Wear
protective gloves and safety glasses or goggles when working
with hydraulic systems. If an accident occurs, see a doctor
immediately. Any fluid injected into the skin must be surgical-
ly removed within a few hours or gangrene may result.
Bleeding Opener Lift Hydraulics
Refer to Figure 1-5.
1. Check hydraulic fluid level in
tractor reservoir and fill toprop-
er level. Add fluid to system
as needed. System capacity for entire drill is about 4
1/2 gallons.
2. Make sure opener frames are locked up in road posi-
tion. Refer to Opener Lock Up, “Operation Instruc-
tions,” page 20.
3. Turn knob on both pressure-control valves (1) com-
pletely counterclockwise, then turn valves clockwise
far enough to build up 1000 psi (about three turns).
4. Turn knob on bypass valve (2) completely clockwise
for no oil flow.
5. Loosen hose-end fittings (3) at the locations shown in
Figure 1-5.
NOTE: Do not loosen an O-ring fitting for bleeding. Bleed-
ing air from an O-ring fitting will damage the seal.
6. Slowly supply oil to top side of pressure-control valves
until oil begins to appear at a loosened hose fitting. As
oil begins to appear at a fitting, tighten that fitting.
7. Slowly supply oil to bottom side of pressure-control
valves until oil begins to appear at remaining loosened
hose fitting. As oil begins to appear at the fitting, tight-
en fitting. Continue to supply oil to bottom side of pres-
sure-control valves until all openers are raised
completely.
8. Move opener transport locks to field position and cycle
openers up and down ten times. Each time you lower
openers, hold tractor remote lever until opener circuit
builds up to pressure set at control valves.
9. After cycling openers, return opener transport locks to
road position.
22981
Figure 1-5
Bleeding Opener Lift Hydraulics