Great Plains NTA3007HD Operator Manual - Manual (Page 121)

Maintenance and Lubrication 117
04/04/2011 166-207M
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 85).
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.
Refer to Figure 123
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 115).
Null4:
Figure 123
In-Line Filter
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