Great Plains 3S-4000HDF Predelivery Manual - Manual (Page 21)

Setup 19
12/10/2009 195-067Q
Bleeding 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 dur-
ing initial implement setup or if you replace a part in
hydraulic system during the life of the drill, complete the
following procedures.
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 surgically
removed within a few hours or gangrene may result.
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.
Bleed only at:
JIC (Joint Industry Conference, 37 ° flare) or
NPT (National Pipe Thread, tapered thread) fittings.
Never bleed at:
ORB (O-Ring Boss) or
QD (Quick Disconnect) fittings.
Check hydraulic fluid level in tractor reservoir and fill to
proper level. Add fluid to system as needed.
Note: System capacity for entire drill is about
4 1 ⁄
2
U.S. gallons
(17 liters).