Great Plains 606NT Predelivery Manual - Manual (Page 10)

605NT and 606NT
151-061Q 8/19/2009
8
Hydraulic Hose Hookup
Great Plains hydraulic hoses are color coded to
help you hookup hoses to your tractor outlets.
Hoses that go to the same remote valve are
marked with the same color.
To distinguish hoses on the same hydraulic circuit,
refer to plastic hose label. Hose under extended-
cylinder symbol feeds cylinder base ends. Hose
under retracted-cylinder symbol feeds cylinder
rod ends.
Rephasing Cylinders
The lift cylinders may, after a period of time, get
out of time or phase. The effects of this can be
seen when one side of the drill is running too low
or too high because its lift cylinder is either over
extended or not retracted compared to the other
lift cylinder.
To rephase the cylinders, raise drill completely
and hold tractor hydraulic lever on for a few sec-
onds to give cylinders time to rephase.
Each time drill is raised out of ground momentarily
reverse hydraulic lever immediately after rephas-
ing to allow cylinders to retract about 1/2 inch.
This will help in maintaining a level drill.
NOTE: Understand that having cylinders become
gradually out of time is different than having air
trapped in the system from improper bleeding.
Each condition is corrected differently.
Bleeding Hydraulics
!
WARNING
Escaping fluid under pressure can have sufficient pres-
sure to penetrate the skin. Check all hydraulic lines
and fittings before applying pressure. Fluid escaping
from a very small hole can be almost invisible. Use pa-
per or cardboard, not body parts, and wear heavy
gloves to check for suspected leaks. If injured, seek
medical assistance from a doctor that is familiar with
this type of injury. Foreign fluids in the tissue must be
surgically removed within a few hours or gangrene
will result.
Color Hydraulic Function
Blue Transport Lift Cylinders
Figure 6
Plastic Hose Label
17641
Plastic
hose label