Great Plains NTA3007HD Operator Manual - Manual (Page 120)

116 NTA907HD or NTA3007HD
166-207M 04/04/2011
Bleeding Weight-Transfer 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. Set circuit to
Float.
1. Review safety advisories and operational advice on
page 112, and on this page, before performing
bleed.
Refer to Figure 121
2.
Fully close bypass , Wing and Center trans-
fer valves.
Fully open Transfer valve
Refer to Figure 122
Hose lengths do not permit disconnecting base end of
cylinder. Bleed in place.
3. Fully retract cylinders. Set circuit to Neutral.
4. Loosen the JIC fittings at the base end of both
weight-transfer cylinders.
5. Slowly extend the circuit until fluid appears at a loos-
ened fittings. Set circuit to Neutral and secure fit-
tings. Repeat until both fittings are secured.
6. Fully extend cylinders. Set circuit to Neutral.
7. Loosen the JIC fittings at the rod end of both
weight-transfer cylinders.
8. Slowly retract the circuit until fluid appears at a fit-
ting. Set circuit to Neutral and secure fitting. Repeat
until both fittings are secured.
9. If bleeding is complete, restore bypass, down-pres-
sure and weight transfer valve settings per:
“Opener Down-Force (Hydraulic)” on page 85.
Null4:
Null4:
Figure 121
Bleed: Weight Transfer Valves
29422
W
C
T
B
k
r
w
c
t
B W C
T
3
Null4:
Figure 122
Weight-Transfer Bleed Points
29474
4
3
3
4
4