Great Plains NTA3010 Operator Manual - Manual (Page 14)

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Section 1 Preparation and Setup
NTA3010 and NTA3510 Air Drill Implement SN Z1370- 160-219M 8/14/
Great Plains Mfg., Inc.
!
WARNING!
Escaping fluid under pressure can have sufficient pressure to
penetrate the skin causing serious injury. Avoid the hazard by
relieving pressure before disconnecting hydraulic lines. Use a
piece of paper or cardboard, NOT BODY PARTS, to check for
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 will result.
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.
!
WARNING!
You may be severely injured or killed by being crushed from a
falling implement. Always have transport locks in place and
frame sufficiently blocked up when working on implement.
1. Check hydraulic fluid level in tractor reservoir and fill to
proper level. Add fluid to system as needed while cy-
cling new cylinders. You will need about 8 3/4 gallons
of oil to fill new cylinders.
2. Support implement frame sections with jack stands or
blocks.
3. With frame blocked and supported, unpin rod ends of
wheel cylinders. Pivot cylinders up and wire or other-
wise safely support rod ends higher than base ends
as shown in Figure 1-6. You may need to remove the
gauge-wheel cylinders from the rockshaft so you can
orient them with rod ends higher than base ends.
Figure 1-6
Rod End Supported
4. With the tractor engine at idle speed, energize the lift
hydraulics. When the gauge-wheel cylinders on wings
have extended completely, 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.
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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 Fold Hydraulics
!
WARNING!
Before attempting to hydraulically lift the implement, the cart
must be attached to the implement and a tractor of sufficient
size. Failure to do so could result in severe equipment damage
and bodily injury or death.
1. Check the hydraulic fluid level in the tractor reservoir
and fill to the proper level. You will need about 6 gal-
lons of oil to fill new cylinders.
2. Be sure implement is hitched to cart and tractor. See
Hitching Cart to Implement, page 10.
3. Hydraulically raise the implement and install rockshaft
and lift-assist transport locks. Refer to Lifting the Im-
plement, “Field Operations,” page 15.
4. Unpin rod end of fold cylinders. Block, wire or other-
wise safely support the rod ends as shown in Figure 1-
7 so they will not contact anything when extended.
Figure 1-7
Fold Cylinder, Rod End Supported
5. Turn the hydraulic selector valve to the Fold/Unfold po-
sition. Refer to Folding the Implement, “Operating In-
structions,” page 15.
6. Cycle the cylinders completely in and out three times
to remove all air from the fold system. Inspect all hos-
es, cylinders and fittings for oil leaks.
7. Extend cylinders and repin to lugs.
8. Recheck the tractor hydraulic reservoir and fill to the
proper level.
9. Slowly fold and unfold implement. Check for hydraulic
leaks. Be aware of any pinch points that might cause
damage or accelerate wear on hydraulic hoses.
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IMPORTANT: Failure to block cylinders before extend-
ing will cause machine damage.