GREAT PLAINS 3S-4000, Руководство оператора

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2018-06-19 Table of Contents Index 195-442M
3S-4000, 3S-4000F, 3S-4000HD, 3S-4000HDF Table of Contents Index Preparation and Setup 24
Refer to Figure 11 on page 23 and Figure 12 at right
4. Release locking discs on down-pressure valves.
Adjust knobs on pressure-control valves for
opener down pressure so gauges are at 1800 psi
(2100 psi for heavy duty models).
5. While watching gauges on drill, slowly turn knob on
bypass valve counterclockwise. Adjust bypass valve
just until needles on gauges begin to move down
from 1800 psi (2100 psi for heavy duty models). Lock
bypass valve at this setting. (See also note below.)
6. Re-adjust pressure-control valves on drill to desired
opener down pressure as explained under See
“
Opener Frame Down-Force ” on page 54.
While 1800 psi (2100 psi for heavy duty models) is a
good starting point for setting the bypass valve, if you
consistently operate the drill with low opener down
pressure you can set the bypass valve below 1800 psi
(2100 psi for heavy duty models). If you consistently
operate the drill with very high opener down pressure,
you may need a bypass-valve setting above 1800 psi
(2100 psi for heavy duty models).
Scraper Installation
Optional disk scrapers are not factory installed. To install
them in the field:
1. Remove one or both disk blades to gain safe access
to the mount. Note the position of bushings and
spacers for correct re-assembly (page 61).
Refer to Figure 13
2. Position the inside scraper mount to the rear of
the seed firmer mount on the opener weldment.
Secure it with two HHCS
3
/
8
-16x1in hex head bolts,
lock washers and nuts. Insert the bolts from the front.
3. Position the scraper blade below and behind the
inside scraper mount , with the notch on top to
machine right.
Secure it loosely with one RHSNB
3
/
8
-16x1 round
head square neck bolt, flat washer, lock washer and
nut.
4. Re-mount the removed disk blade.
5. Adjust the scraper blade per “ Disk Scraper
Adjustments ” on page 61.
Figure 12
Down Pressure for Bypass
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5
6

The higher the bypass pressure, the greater the
potential for oil heating and premature tractor
damage. At the same time, for proper opener
operation the bypass valve must be set at least
300 psi above the opener down-pressure setting
when the tractor is at one-half throttle. Therefore, you
should set the bypass valve as low as possible while
staying at least 300 psi above the opener down
pressure setting.
5
6
4
Figure 13
Scraper Installation
26460
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1
3
1
2
3
1