Bleeding hydraulics – Great Plains 800 Operator Manual User Manual
Page 41
Great Plains Manufacturing, Inc.
Maintenance and Lubrication
37
2011-10-25
175-057M
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 openers to drop
rapidly during raising and lowering. If hydraulics were not
bled during initial implement setup or if you replace a
part in hydraulic system during the life of the drill,
complete the following procedures.
High Pressure Fluid Hazard:
Relieve pressure before disconnecting hydraulic lines. Use a
piece of paper or cardboard, NOT BODY PARTS, to check for
suspected leaks. Wear protective gloves and safety glasses or
goggles when working with hydraulic systems. Escaping fluid
under pressure can penetrate the skin causing serious injury.
If an accident occurs, seek immediate medical attention from
a physician familiar with this type of injury.
Negative Tongue Weight Hazard:
Be certain that drill is hitched securely to your tractor
drawbar and the safety chain is securely attached to tractor
before raising openers or unfolding drill. Raising openers on
unfolded, unhitched drill will cause drill tongue to rise
suddenly, which could cause serious injury or death.
Equipment Damage Risk:
Bleed at:
JIC (Joint Industry Conference, 37
° flare) or
NPT (National Pipe Thread, tapered thread) fittings.
Avoid bleeding at:
ORB (O-Ring Boss)
Never bleed at:
QD (Quick Disconnect) fittings.
Check hydraulic fluid level in tractor reservoir and fill to
proper level. Add fluid to system as needed.
System capacity for the Great Plains cylinder and hoses
is
1
⁄
2
gallon (1.9 liters).