Adjust weight transfer valves – Great Plains NTA607HD Operator Manual User Manual
Page 6
6
Great Plains Manufacturing, Inc.
NTA607HD Lift Assist Adjustments
166-365M
12/02/2010
Adjust Weight Transfer Valves
Refer to Figure 6 and Figure 7
Do not set cart weight transfer higher than necessary. Values
close to 1000 psi can lift the rear of an empty cart off the
ground. As a cart nears empty, the main tires can begin to slip,
or stop turning altogether, resulting in irregular seeding rates
or stoppages.
Wing Weight Transfer Adjustment (Outer Valve)
Note: This valve will most likely not need adjusting. It will
already be set to meet your requirements.
1.
Release lock ring
on wing-transfer valve
.
Adjust knob
while observing gauge
.
Increase weight transfer to wings by turning knob
clockwise. Reduce weight transfer to wings by turn-
ing knob counter-clockwise.
Set pressure to at least 250 psi.
Secure setting with lock ring.
Cart Weight Transfer Adjustment (Inner Valve)
Note: This valve will need adjusting to get the results
you require.
2.
Release lock ring
on cart-transfer valve
.
Adjust knob
while observing gauge
.
Increase weight transfer from cart by turning knob
clockwise. Reduce weight transfer from cart by turn-
ing knob counter-clockwise.
Set pressure to at least 100 psi.
Secure setting with lock ring.
3.
Pull forward in ground. Assess opener penetration,
and coulter (option) penetration. Compare wings to
center section.
4.
During field operations, monitor coulter and opener
depth of wings and center section. Adjust weight
transfer as required for consistent depth across drill.
5.
Once the cart weight transfer has been adjusted,
adjust the rear lift assist adjustment linkage as
described in “Adjust Linkage” on page 7.
Figure 6
Pressure Reducing Valve
Inner Valve Controls Cart
Outer Valve Controls Wings
31192
1
2
3
4
6
7
5
8
To avoid planting problems, do not exceed 1500 psi for wing-
transfer, and 1000 psi for cart-transfer. A relief valve prevents
operating the wing-transfer at over 1500 psi.
Figure 7
Pressure Reducing Valve Decals
Cart: Decal on Left
Wing: Decal on Right