Great Plains NTA3007HD Operator Manual - Manual (Page 118)

114 NTA907HD or NTA3007HD
166-207M 04/04/2011
Bleeding Fold Hydraulics
If the systems have sufficient fluid for safe operation,
prior to bleeding, perform unfold (page 25), tilt down
(page 28) and lower (page 32) operations.
1. Review safety advisories and operational advice on
page 112, and on this page, before performing
bleed.
Refer to Figure 116
2.
With drill unfolded and monitor power on, leave
MASTER and Wing Fold ON, and set hydraulic cir-
cuit to Float to relieve pressure in lines.
Null4:
Refer to Figure 117
3.
Un-pin three cylinder rod ends. Orient cylinders so
that rod ends may extend without striking drill parts.
4. Fully retract cylinders. Set circuit to Neutral.
5. Loosen the JIC fittings at the base end of both fold
cylinders, and at the base end of the tongue latch
cylinder
.
6. Slowly extend the circuit until fluid appears at a loos-
ened fittings. Set circuit to Neutral and secure fit-
tings. Repeat until all three fittings are secured.
7. Fully extend cylinders. Set circuit to Neutral.
8. Loosen the JIC fittings at the rod end of both fold
cylinders, and at the rod end of the tongue latch
cylinder
.
9. Slowly retract the circuit until fluid appears at a fit-
ting. Set circuit to Neutral and secure fitting. Repeat
until all three fittings are secured.
10. Use tractor circuit to re-position rod ends and re-pin.
Bleeding Hook Hydraulics
Drill must be at least partially unfolded for this bleed, so
that wings are not supported on transport hooks.
1. Review safety advisories and operational advice on
page 112, and on this page, before performing
bleed.
Refer to Figure 118
2.
Fully retract hook cylinder. Set hook circuit to Neu-
tral. Loosen base end JIC fitting
.
3. Slowly Extend circuit until fluid appears at cracked
fitting. Set circuit to Neutral and secure fitting.
4. Fully Extend hook circuit. Set circuit to Neutral.
Loosen rod end JIC fitting
.
5. Slowly Extend circuit until fluid appears at cracked
fitting. Set circuit to Neutral and secure fitting.
Null4:
Figure 116
CFM Fold Enable for Bleed
29380
Null4:
Figure 117
Fold Bleed Points
29466
3
3
4
4
5
6
3
5
4
6
Null4:
Figure 118
Hook Bleed Points
29466
8
7
8
7