Great Plains 2S-2600F Predelivery Manual - Manual (Page 9)

7
Section 2 Setup
2S-2600 and 2S-2600F Two-Section Folding Drill 195-201Q 2012-04-04
Great Plains Mfg., Inc.
20004
1. Connect opener-lift hoses to circuit designated for hy-
draulic-motor control.
2. Connect transport-lift hoses to tractor remote valve.
3. Connect fold hoses to tractor remote valve.
NOTE: If your tractor has only two remote valves, you must
install a double-selector valve to combine the transport-lift
and opener-lift circuits. Refer to Two Outlet Hydraulic Kit,
“Options,” in the operator’s manual.
Bleeding the Hydraulics
To function properly, the hydraulics must be free of air. If
hydraulics are not bled, they will operate with jerky, uneven
motions and could cause wings to drop rapidly during fold-
ing or unfolding. Complete the following procedures dur-
ing initial drill setup.
!
WARNING!
Rasing the openers on the unfolded, unhitched drill will cause
the drill tongue to rise suddenly, which could cause serious in-
jury or death. Be certain that the drill is hitched securely to your
tractor drawbar and the safety chain is securely attached to the
tractor before raising the openers and unfolding the drill.
!
WARNING!
Escaping fluid under pressure can penetrate the skin causing
serious injury. Avoid the hazard by relieving pressure be-
fore disconnecting hydraulic lines. Use a piece of pa-
per or cardboard, NOT BODY PARTS, to check
for suspected leaks. Wear protective gloves
and safety glasses or goggles when work-
ing with hydraulic systems. If an accident
occurs, see a doctor immediately. Any flu-
id injected into the skin must be surgical-
ly removed within a few hours or
gangrene
could result.
Bleeding Opener Lift Hydraulics
Refer to Figure 2-3.
1. Check hydraulic fluid level in tractor reservoir and fill to
proper 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,” in the operator’s manual.
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 2-3.
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.
Figure 2-3
Bleeding Opener Lift Hydraulics