Great Plains NTA1300 Operator Manual - Manual (Page 14)

12 NTA 1000 and NTA 1300 148-528M 5/26/2006
Great Plains Mfg., Inc. Preparation and Set-Up
Bleeding Hydraulic Systems
!
WARNING!
Escaping fluid under pressure can have sufficient pressure 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 paper 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.
Note: For safe and smooth operation, the hydraulic sys-
tems must be free of air. The hydraulic systems should be
bled during initial implement set-up. If they were not bled,
or if you replace a hydraulic component during the life of
the drill, bleed the hydraulics.
Bleeding Lift Hydraulics
The lift system is equipped with rephasing hydraulic cylin-
ders that require a special procedure for bleeding air from
the system. Read and follow the procedure carefully.
1. Check hydraulic fluid level in tractor reservoir and fill to
proper level. Add fluid to system as needed while cy-
cling new cylinders. LIft hydraulic capacity is 23 liters
(6.1 gallons).
2. Lower drill to ground.
3. Unpin rod ends of wheel cylinders. Pivot cylinders up
and wire or otherwise safely support rod ends higher
than base ends. You may need to remove the trans-
port wheel cylinders from the mainframe so you can
orient them with rod ends higher than base ends.
4. With the tractor engine at idle speed, energize the lift
hydraulics. When the cylinders have extended com-
pletely, hold the remote lever on for one minute. Check
all hydraulic hoses, cylinders and fittings for leaks.
5. Retract the cylinder rods. Extend the rods again and
hold the remote lever on for one more minute. Repeat
this step two more times.
6. Again, check all hydraulic hoses, cylinders and fittings
for leaks. Recheck the tractor hydraulic reservoir. Fill
to the proper level.
7. Repin all cylinders.
Bleeding Tongue Cylinder
8.
Check hydraulic fluid in tractor reservoir and fill to
proper level. Add fluid to system as needed. Tongue
cylinder capacity is 1.89 litres (one-half gallon).
9. Raise and safely support hitch, transport frame and
front tongue.
10. Unpin rod end of tongue cylinder. Block, wire or other-
wise safely support cylinder so when rod end is fully
extended it does not contact anything.
11. Cycle cylinder completely in and out at least three
times to purge air from cylinder and hoses.
12. Fully extend cylinder and repin rod end.
13. Recheck tractor reservoir and fill to proper level.
Bleeding Fold Hydraulics
Check hydraulic fluid level in tractor reservoir and fill to
proper level. Add fluid to system as needed while cycling
new cylinders. Fold hydraulic capacity is 5.6 liters (1.5 gal-
lons). If drill fold cylinders have not been extended:
1. Crack fittings at base end of cylinders. Extend cylin-
ders to purge air from system.
2. Crack fittings at rod end of cylinders. Retract cylinders
to purge remaining air from system.
3. Tighten all fittings. Extend cylinders and pin to drill
lugs.
If drill cylinders have been extended:
1. Unfold drill so that fold cylinders are completely ex-
tended. Lower drill to ground. Unpin rod ends of fold
cylinders.
2. Crack fittings on rod end of cylinders. Purge air from
cylinders by retracting cylinder rods.
3. Crack fittings at base end of cylinders. Extend cylin-
ders to purge remaining air from system.
4. Tighten all fittings. Repin cylinders to drill.
!
CAUTION!
You may be injured or killed by a folding or unfolding opener or
coulter frame.