Great Plains 2S-2600HDF Operator Manual v1 - Manual (Page 57)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 53
2014-05-16 Table of Contents Index 195-440M
To change the bolts (to high pressure):
1. Have a jack at hand.
2. Loosen the nuts on all the top bolts .
3. Lower the opener sub-frames.
4. Put the tractor hydraulic circuit for the openers in
float.
5. Place jack under an opener tool bar at an arm.
6. Lift the tool bar until the bolt is free.
7. Remove the bolt.
8. Repeat step 5 through step 7 the other arm of the
subframe.
9. Raise the jack until the top holes are aligned.
10. Insert the bolt in the top hole and spin on a nut.
11. Repeat step 5 through step 10 for each sub-frame.
12. Tighten all nuts.
13. Changing from high to low is similar, except lower the
jack at step 6 and reverse the bolt movement.
Hydraulic Down-Force
Pounds of Force at Opener Disks
Gauge
Setting
6 inch
rows
7
1 ⁄
2
inch
rows
10 inch
rows
200 PSI 83 86 92
300 PSI 90 95 102
400 PSI 97 103 113
500 PSI 103 111 124
600 PSI 110 119 135
700 PSI 117 128 146
800 PSI 123 136 157
900 PSI 130 144 167
1000 PSI 137 152 178
1100 PSI 143 161 189
1200 PSI 150 169 200
1300 PSI 157 177 211
1400 PSI 163 185 222
1500 PSI 170 194 233
1600 PSI 176 202 244
1700 PSI 183 210 254
1800 PSI 190 218 264
4
5