Great Plains
| 166-207M | 02/26/2019
116
NTA907HD and NTA3007HD
Maintenance and Lubrication
In-Line Filter
If the raising or lowering times of the openers slow
noticeably, check the in-line filter and clean if needed.
The filter is located at the inlet port of the down-pressure
valve block (page 84).
1.
Unfold drill (page 25). Lower openers (page 32) as if
for planting (down-pressure active).
2.
Record the current bar or psi readings on the down-
pressure and weight-transfer gauges.
3.
Set lift circuit to Float.
4.
Completely close the Center, Wing and Transfer
valves to minimize fluid loss. The Bypass valve may
be left as-is.
5.
Shut down tractor and remove key.
6.
Slowly loosen filter and relieve any residual pressure
in line. When disconnecting hose, support the end to
minimize fluid loss.
7.
To disassemble unscrew end cap of filter. Remove
top retaining washer and screen.
8.
Clean filter screen with solvent and compressed air,
or replace if needed.
9.
When reassembling put screen into filter. Place
retaining washer on top of filter and screw on end
cap.
10. Re-install filter.
11. Activate the lift circuit for down-pressure. Cycle the lift
system several times. Check for leaks.
12. Restore the Center, Wing and Transfer valves to their
former settings.
13. Cycle the lift system several times. If there is any sign
of air in the system, perform a bleed operation
(page 114).
Figure 121
In-Line Filter
25187
Summary of Contents for NTA3007HD
Page 2: ...Great Plains 166 207M 02 26 2019 Table of Contents Index ii 166 207M Table of Contents Index ...
Page 4: ...2SF24 and 2SF30 ...
Page 177: ...Table of Contents Index Table of Contents Index ...
Page 178: ...Great Plains Mfg 1525 E North St P O Box 5060 Salina KS 67402 Table of Contents Index ...