Great Plains Hydraulic Depth Stop - Manual

1
Update Instructions
Great Plains Mfg., Inc.
© Copyright 1996 Printed 10/19/07
Used with:
•
•
196-188M
2N-24 & 2N-30 Drills
Hydraulic Depth Stop Update
24’ and 30" Folding No-Till Drill
20 Series Folding Drill
Before You Start
These update instructions provide information on how to modify
the 2N-24 and 2N-30 drills. These modifications will improve the
performance, reliability and/or safety of the original equipment. A
detailed Operator’s Manual was supplied with the main unit when
it was purchased. Refer to the Operator’s Manual for information
on safety, operation, adjustment, troubleshooting, and mainte-
nance pertaining to this equipment (some of these sections do
not apply to all equipment).
A separate Parts Manual for replacement parts can be pur-
chased from your dealer. Have model and serial numbers handy
when placing an order.
Manual Part Numbers:
• Folding No-Till Operator’s Manual . . . . . . . . . . . . .196-126M
• Folding No-Till Parts Manual . . . . . . . . . . . . . . . . . 196-126P
• 20 Series Folding Drill Operator’s Manual . . . . . . .196-164M
• 20 Series Folding Drill Parts Manual . . . . . . . . . . . 196-164P
General Information
These update instructions apply to the 2N-24 and 2N-30 Depth
Stops listed below:
196-189A 2SNT DEPTH STOP UPDATE KIT
Starting on page 4 is a detailed listing of parts included in these
kits. Use this list as a checklist to inventory parts received.
Instructions
The existing hydraulic depth stop valve is being upgraded. With
the new valve the coulter depth is adjusted by means of a knob
on the valve assembly (remove bushings before operation).
!
CAUTION!
Escaping fluid under pressure can have sufficient force to penetrate the
skin. Check all hydraulic lines and hoses before applying pressure.
Fluid escaping from a very small hole can be almost invisible. Use pa-
per or cardboard, not body parts, to check for suspected leaks. If in-
jured, seek medical assistance from a doctor that is familiar with this
type of injury. Foreign fluids in the tissue must be surgically removed
within a few hours or gangrene will result.
NOTE: JIC fittings do not require high torque. JIC and o-ring
fittings do not require sealant. Always use liquid pipe sealant
when adding or replacing pipe thread fittings. To avoid pos-
sible danger of cracking hydraulic fittings from overtighten-
ing, do not use plastic sealant tape.
IMPORTANT: When using sealant on pipe threads the friction
between the threads is reduced; therefore, be certain not to over
tighten which may cause damage to a valve, cylinder port or fit-
ting.
Disassembly of Existing Depth Stop
Refer to Figure 1:
With the drill attached to the tractor, unfold and lower the drill into
field position and relieve the cylinder pressure on the field lift cyl-
inders . Remove the hard line (#1) and disconnect the hose (#2)
from the rod end of the left hand cylinder which the depth stop
valve is attached to. Unpin and remove the cylinder (#3). Re-
move and discard parts 4 through 10 from the cylinder.
When you see this symbol, the subsequent instructions
and warnings are serious - follow without exception. Your
life and the lives of others depend on it!
!
Disassembly
Figure 1
15662