Great Plains V300 Operator Manual
Great Plains Mfg., Inc.
Installation Instructions 1
Opener Down Pressure Kit
V300 Drill
Used with:
• All model year V300 drills
General Information
These instructions explain how to install the Opener
Down Pressure Kit. This Option provides dynamic
hydraulic down force on the openers.
Refer to Figure 1
The kit replaces the level link arm ➀ (shown as a dotted
line in the figure) with a hydraulic cylinder ➁. The cylinder is controlled by a new valve assembly ➂ and
requires a new attachment point (lug) weldment ➃.
These instructions apply to:
148-765A Kit for Closed-Center Tractors
148-766A Kit for Open-Center Tractors
Due to shipping regulations, the kit does not include any
touch-up paint to restore the areas to be welded. Your
Great Plains dealer can provide it as Great Plains part:
821-001C PAINT GP GREEN SPRAY CAN
If this part is not available in your locale, use a green
exterior enamel paint close to Pantone 356.
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!
➂
➁
Figure 1
Upgrade Overview
➃
➀
25165
Before You Start
Each kit converts an entire drill. Inventory the contents
per the “Kit Parts List” on page 24.
IMPORTANT !
Make sure you have the correct kit for your tractor’s hydraulic system. If you have the incorrect
kit, it will not operate properly and can result in
equipment damage.
If necessary, move the implement to a well-lighted location suitable for disassembly. Make sure the ground/floor
under the tractor is non-flammable.
Note: Many of the hydraulic components are shipped
with protective caps. Leave these caps in place
until connections are made, to protect threads and
keep contaminants out of the hydraulic system.
©Copyright 2006 Printed 11/08/2006 148-771M
!
CAUTION
There will be sparks from welding. Dry grass, wood floor, or
areas with flammable fluid spills are not suitable locations for
installing this upgrade.
Lower the drill.
Park and secure the tractor, but leave it connected.
“Left” and “Right” are facing in the direction of machine
travel.
Have the following tools at hand:
• Wire or stick welder and welding tarps.
• Basic hand tools, including either adjustable openend wrenches or a set of fractional inch sizes.
• Paste or liquid tetrafluorethylene (Teflon®) pipe sealant (do not use pipe tape).
• Fluid collection pan.
2 Opener Down Pressure Kit
Installation
Remove Level Link Arm
Refer to Figure 2
1. With the drill lowered, the link level arm ➀ is in nei-
ther tension nor compression. Open the float lock
lug ➁.
➄
➀
Great Plains Mfg., Inc.
➁
➂
➃
Refer to Figure 3
2. At the forward end of the level link ➀, remove bolt
➁ and nut ➂. This bolt and nut, and the washers,
are not re-used.
Refer to Figure 2
3. At the rear end of the link level arm, remove cotter
pin ➂ and clevis pin ➃. The pins (and the washers) are not re-used.
Note: There is a bushing ➄ in the rocker arm. Do not
remove it.
4. Remove the level link ➀ arm from the drill. It is not
re-used.
Figure 2
Relax Level Link
➁
Figure 3
Remove Level Link
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➀
➂
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148-771M 11/08/2006
Great Plains Mfg., Inc.
Weld Lug
Refer to Figure 4
5. Select lug (25) 248-508D,
(TOP LINK CYL LUG).
6. Temporarily position the new top link cylinder lug
(25) against the pivot plate ➀ on the drill frame ➁.
7. Center the lug (25) left-to-right, and push it as far
back against the pivot plate ➀ as possible before it
begins to ride up on the existing weld fillet. This
may leave a vertical gap at ➂.
8. Scribe the outline of the lug (25) on the pivot plate
➀.
9. Brush or sand the paint from the inscribed area,
plus ~1.3cm outside that area.
Installation Instructions 3
➀
25
➁
➂
!
CAUTION
Use caution when using tools that emit sparks such as welders. Wear suitable protective equipment. Do not use sparkemitting tools in areas where flammable or explosive materials may be present. Do not allow anyone to enter the path of
sparks.
Refer to Figure 4
10. Protect any nearby hoses or cables with welding
tarps.
11. Re-position the lug (25) as in step 7. Tack-weld the
lug in two places. Re-check centering and 90
degree vertical alignment.
12. Make a high tensile strength 100% wire or stick
weld around the entire base of the lug, with a fillet
of approximately 1.3cm.
13. Allow lug to cool.
14. Brush or sand off any burrs or other weld artifacts,
and paint. Apply a metal primer if a matching green
exterior enamel paint is not immediately available.
Figure 4
Position Lug
25168
Figure 5
Weld Lug
25169
Drain Hydraulic System
This upgrade kit is inserted in the existing hydraulic system at two points. Removing the fittings at these two
points will result in some loss of fluid (which is why it is
important to perform this and later steps after the welding). The following steps minimize fluid loss.
15. Put the tractor hydraulic controls into “float” mode.
16. Shutdown the tractor hydraulic system.
11/08/2006 148-771M
17. Loosen the fitting at the top of the left lift cylinder,
enough to let air enter at that point.
18. Set a collection pan under the right lift cylinder.
19. Loosen the fitting there enough to begin draining
fluid into the pan.
4 Opener Down Pressure Kit
Assemble Closed-Center Valves
This section is for the 148-765A Closed-Center (CC) kit.
If you have the 148-766A Open-Center kit, see page 7.
Callout numbers are assigned from the “Kit Parts List”
on page 24.
Assemble CC Down Pressure Control Valve
Refer to Figure 6
20. Select the (44) 810-301C,
(VALVE PRESS REDUCING W/CHECK).
Note: The orientation of the valve is that the control
knob faces Front and is toward the Bottom of the
valve body.
21. Select a (58) 811-216C,
(EL 3/4MJIC 9/16MORB).
Screw the male O-ring boss end into the Top Front
port of valve body (44). Adjust the JIC end to face
Left and tighten jam nut.
22. Select the (65) 811-677C,
(AD 9/16MORB 1/4FNPT).
Screw the male O-ring boss end into the Top Rear
port of valve body (44). Do not fully tighten.
23. Select a (52) 811-064C,
(TE 9/16MJIC 9/16MJIC 9/16MORB).
Screw the male O-ring boss end into the Rear port
of valve body (44). Adjust the tee so the center port
faces Right and tighten jam nut.
24. Select a (66) 841-077C,
(EL 3/4FJIC 3/4MORB).
Screw the female JIC end onto fitting (58). Adjust
angle so that the ell points to the Rear, and tighten.
25. Select the (43) 810-300C,
(PRESSURE GAUGE 3000 PSI).
Apply TFE sealant to threads. Screw it into fitting
(65). Tighten gauge to come as close as possible
to suggested torque values, and still have gauge
facing Forward.
26. Select a (52) 811-064C,
(TE 9/16MJIC 9/16MJIC 9/16MORB).
Screw the male O-ring boss end into the Bottom
port of valve body (44). Adjust the tee so the center
port faces Left and tighten jam nut.
27. Select a (52) 811-064C,
(TE 9/16MJIC 9/16MJIC 9/16MORB).
Screw the female JIC end onto fitting (52) on the
Rear of valve body (44). Make the final turns to
leave the open end facing down.
28. Select the (49) 810-554C,
(FILTER INLINE 3/4FORB 3/4MJIC).
Screw it onto fitting (66) and tighten.
Great Plains Mfg., Inc.
Torque fittings and fasteners per “Torque Values” on
page 23.
A cluster of arrows in each diagram shows directions (T)
Top, (B) Bottom, (L) Left, (R) Right, (F) Front and (R)
Rear.
43
58
66
55
49
65
50
44
T
R
R
52
L
52
F
B
Figure 6
CC Down Pressure Valve
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Great Plains Mfg., Inc.
Assemble CC Check Valve
Refer to Figure 7
29. Select the (47) 810-428C,
(VALVE PO CHECK 4:1 W/9/16FORB).
Note: The ports of valve (47) are stamped with num-
bers “1”, “2” and “3”. Orient the valve so that Port
➀ is to the Left, port ➁ to the Right and port ➂ to
the Rear.
30. Select a (56) 811-170C,
(AD 9/16MORB 9/16MJIC).
Screw the male O-ring boss end into port ➀ of
valve body (44).
31. Select a (56) 811-170C,
(AD 9/16MORB 9/16MJIC).
Screw the male O-ring boss end into port ➂ of
valve body (44).
32. Select a (62) 811-627C,
(AD 9/16MORB 9/16FJIC).
Screw the male O-ring boss end onto check valve
assembly (47) at port ➁. Tighten jam nut.
R
R
T
B
Installation Instructions 5
56
➂
56
➀
➁
47
L
44
F
Figure 7
CC Check Valve
62
25171
33. Screw the check valve assembly (47), onto the
male JIC fitting at the Bottom of adjustment valve
assembly (44). Rotate check valve assembly (47)
so that port ➂ faces Rear before tightening JIC
nut.
Assemble CC Bypass Valve
Refer to Figure 8
34. Select the (48) 810-432C,
(HYDRAULIC BYPASS VALVE).
Note: Orient the valve (48) so that the adjustment knob
is on Top, toward Right and Front.
35. Select two (51) 811-063C,
(EL 3/4MJIC 3/4MORB).
Screw both into the Front ports of valve (48).
Rotate each to point to the Left and down before
tightening jam nuts.
36. Select a (59) 811-249C,
(TE 9/16MJIC 3/4MORB 9/16MJIC).
Screw the male O-ring boss end into the Rear Bottom port of valve (48). Point the center port of the
tee down before tightening jam nut.
37. Select a (54) 811-133C,
(AD 9/16MJIC 3/4MORB).
Screw the male O-ring boss end into the Rear Top
port of valve (48).
R
R
T
B
54
59
48
51
51
L
F
Figure 8
CC Bypass Valve
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6 Opener Down Pressure Kit
Assemble CC Valves on Mount
Refer to Figure 9 & Figure 10. Figure 10 shown exploded for clarity.
38. Select the (23) 248-506D,
(OPNR DOWN PRESSURE VALVE MNT).
Orient it so that the smaller of the two vertical
plates is to the Right, and the horizontal base plate
is at the Bottom.
Note: Both valve assemblies mount on the Right side of
the vertical plates. The check valve mounts under
the base.
39. Align the mounting holes ➀ of the adjustment
valve assembly (44) with the holes in the small vertical plate ➁. Align the notches ➂ in the check
valve assembly (47) with the holes under the base
plate ➃. This two valve assembly mounts outside
and under the mount.
40. Select two each:
(31) 802-551C, HHCS 1/4-20X2 1/4 GR5,
(39) 804-075C, WASHER FLAT 1/4 USS PLT,
(36) 804-006C, WASHER LOCK SPRING 1/4 PLT,
(32) 803-006C, NUT HEX 1/4-20 PLT.
From inside the mount, place a washer (39) on
each bolt (31) and insert the bolt out through plate
holes ➁, into the holes ➀ in the adjustment valve
(44) and loosely fit a lock washer (36) and nut (32).
R
R
48
➄
➁
44
T
L
F
B
➀
Figure 9
Mount Closed Center Valves
Great Plains Mfg., Inc.
23
➅
➃
➂
47
25173
41. Select two each:
(31) 802-551C, HHCS 1/4-20X2 1/4 GR5,
(36) 804-006C, WASHER LOCK SPRING 1/4 PLT,
(32) 803-006C, NUT HEX 1/4-20 PLT.
and four each:
(39) 804-075C, WASHER FLAT 1/4 USS PLT,
From inside the mount, place a washer (39) on
each bolt (31), down through the plate hole ➃ into
the notches ➂ of the check valve (47) and loosely
fit another washer (39), lock washer (36) and nut
(32).
42. Snug the valve assemblies (44)(47) against the
mounting plate (23), seat bolts deeply in notches,
and tighten all bolts and nuts.
43. Select two each:
(28) 802-024C, HHCS 3/8-16X3 GR5,
(37) 804-013C, WASHER LOCK SPRING 3/8 PLT
(33) 803-014C, NUT HEX 3/8-16 PLT
Select also six:
(40) 804-087C, WASHER FLAT 3/8 HARD
ASTMF436
From the Left outside of the mount, insert each bolt
(28) through one washer (40), then through the
plate holes ➅. Slide on two additional washers (40)
as spacers, then the bypass valve assembly (48)
via holes ➄. Fasten with a lock washer (37) and a
nut (33).
33
37
48
32
36
44
➀
➁
40
➄
Closed Center Fasteners
31
39
47
39
Figure 10
39
31
R
F
➅
T
R
L
B
40
28
➃
➂
36
32
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148-771M 11/08/2006
Great Plains Mfg., Inc.
Installation Instructions 7
Assemble Open-Center Valve
This section is for the 148-766A Open-Center (OC) kit. If
you have the 148-765A Closed-Center kit, see page 4.
Callout numbers are assigned from the “Kit Parts List”
on page 24.
Assemble OC Down Pressure Control Valve and Shuttle Valve
Refer to Figure 6
44. Select the (44) 810-301C,
(VALVE PRESS REDUCING W/CHECK).
Orient it so that the control knob is on the Front,
toward the Bottom.
45. Select a (58) 811-216C,
(EL 3/4MJIC 9/16MORB).
Screw the male O-ring boss end into the Top Front
port of valve body (44). Adjust the JIC end to face
Left and tighten jam nut.
46. Select a (64) 811-675C,
(PL 9/16MORB HEX HEAD).
Screw the plug into the Top Rear port of valve body
(44) and tighten.
47. Select a (63) 811-636C,
(AD 9/16MORB STRAIGHT UNION).
Screw the male O-ring boss end into the Rear port
of valve body (44) Do not fully tighten at this time.
48. Select a (52) 811-064C,
(TE 9/16MJIC 9/16MJIC 9/16MORB).
Screw the male O-ring boss end into the Bottom
port of valve body (44). Adjust the tee so the center
port faces Left and tighten jam nut.
49. Select a (66) 841-077C,
(EL 3/4FJIC 3/4MORB).
Screw the female JIC end onto fitting (58). Adjust
angle so that the ell points to the Rear, and tighten.
50. Select the (49) 810-554C,
(FILTER INLINE 3/4FORB 3/4MJIC).
Screw it onto fitting (66) and tighten.
51. Select the (45) 810-343C,
(VALVE PO CHECK 2:1 W/9/16FORB).
Note: The ports of valve (45) are stamped with num-
bers “1”, “2” and “3”. Orient the check valve so
that port ➁ is to the Front, port ➀ to the Rear and
port ➂ at the Bottom.
Torque fittings and fasteners per “Torque Values” on
page 23.
A cluster of arrows in each diagram shows directions (T)
Top, (B) Bottom, (L) Left, (R) Right, (F) Front and (R)
Rear.
45
R
R
T
L
F
58
49
B
➀
64
➁
66
➂
63
56
52
Figure 11
OC Down Pressure Valve
44
25175
52. Select a (56) 811-170C,
(AD 9/16MORB 9/16MJIC).
Screw the O-ring boss end into port ➂ on the Bottom of check valve (45), and tighten.
53. Orient check valve (45) so that the hex nut is on
Top. Lay the Right faces of entire assembly on a
flat surface, and tighten union (63).
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8 Opener Down Pressure Kit
Assemble OC Check Valve Group
Great Plains Mfg., Inc.
54. Select a (47) 810-428C,
(VALVE PO CHECK 4:1 W/9/16FORB).
Note: The ports of check valve (47) are stamped with
numbers “1”, “2” and “3”. Orient the valve so that
Por t ➀ is to the Left, port ➁ to the Right and port
➂ to the Rear.
55. Select a (56) 811-170C,
(AD 9/16MORB 9/16MJIC).
Screw the male O-ring boss end into port ➀ of
valve body (47).
56. Select a (56) 811-170C,
(AD 9/16MORB 9/16MJIC).
Screw the male O-ring boss end into port ➂ of
valve body (47).
57. Select a (62) 811-627C,
(AD 9/16MORB 9/16FJIC).
Screw the male O-ring boss end onto check valve
assembly (47) at port ➁. Tighten jam nut.
58. Screw the check valve assembly (47), onto the
male JIC fitting at the Bottom of adjustment valve
assembly (44). Rotate check valve assembly (47)
so that port ➂ faces Rear before tightening JIC nut.
Assemble the OC Gauge Tree
Refer to Figure 13
59. Select a (60) 811-439C,
(TE 9/16MORB 9/16MJIC 9/16MJIC).
Orient the tee end ports up and down. The O-ring
boss port will face Front in final assembly.
60. Select a (61) 811-582C,
(AD 9/16FJIC 1/4FNPT).
Screw JIC end onto the Top of fitting (60). Tighten.
61. Select a (50) 811-061C,
(TE 9/16MJIC 9/16MJIC 9/16FJIC).
Screw female JIC end onto the Bottom of fitting
(60). Orient the side port to point Left, and tighten.
62. Select a (55) 811-169C,
(EL 9/16MJIC 9/16FJIC).
Screw it onto the center port off tee fitting (50). Orient the male end to point down and slightly forward, and tighten.
63. Select a (50) 811-061C,
(TE 9/16MJIC 9/16MJIC 9/16FJIC).
Screw female JIC end onto the Bottom of fitting
(50). Orient the side port to point Right. Tighten.
64. Select a (43) 810-300C,
(PRESSURE GAUGE 3000 PSI).
Apply pipe compound and screw into fitting (61).
Tighten so that the gauge faces Front.
44
50
50
56
Figure 12
OC Check Valve
43
Figure 13
OC Gauge Tree
➂
➁
61
60
47
62
55
➀
R
R
R
R
56
T
L
F
B
25176
T
L
F
B
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148-771M 11/08/2006
Great Plains Mfg., Inc.
Installation Instructions 9
Connect Gauge Tree to Valve Assembly
Refer to Figure 14
65. Screw the center port of tee (60) onto the Rear
port ➀ of adjustment valve (45).
66. Orient gauge tree so that gauge is on Top.Tighten
the connection between tee (60) and check valve
(45) port ➀.
Assemble OC Bypass Valve Group
Refer to Figure 15
67. Select a (48) 810-432C,
(HYDRAULIC BYPASS VALVE).
Note: Orient the valve (48) so that the adjustment knob
is on Top, toward Right and Front.
68. Select two (51) 811-063C,
(EL 3/4MJIC 3/4MORB).
Screw both into the Front ports of valve (48).
Rotate each to point to the Left and down before
tightening jam nuts.
69. Select a (59) 811-249C,
(TE 9/16MJIC 3/4MORB 9/16MJIC).
Screw the male O-ring boss end into the Rear Bottom port of valve (48). Point the center port of the
tee down before tightening jam nut.
70. Select a (59) 811-249C,
(TE 9/16MJIC 3/4MORB 9/16MJIC).
Screw the male O-ring boss end into the Rear Top
port of valve (48). Point the center port of the tee
Right and down before tightening jam nut.
71. Select a (50) 811-061C,
(TE 9/16MORB 9/16MJIC 9/16MJIC).
Screw the male O-ring boss end into the Rear Top
port of the Bottom tee (59).
72. Select a (55) 811-169C,
(EL 9/16MJIC 9/16FJIC).
Screw female JIC end into the center (Bottom) port
of tee (50)
73. Select the (46) 810-344C,
(VALVE SHUTTLE 9/16FORB PORTS).
Note: The ports of valve (46) are stamped with numbers
“1”, “2” and “3”. Orient the shuttle valve so that port
➀ is to the Front, port ➁ to the Rear and port ➂ at
the Bottom.
74. Select a (53) 811-065C,
(EL 9/16MJIC 9/16MORB).
Screw the male ORB end into the Rear port ➁ of
shuttle valve (46). Orient the JIC end to point down.
75. Select a (56) 811-170C,
(AD 9/16MORB 9/16MJIC).
Screw the male ORB end into the Bottom port ➂ of
shuttle valve (46) and tighten.
T
R
R
B
60
➀
45
➁
53
➂
Figure 14
OC Gauge Tree to Valves
46
62
50
➀
59
25178
T
R
R
B
48
➂
56
55
59
Figure 15
OC Bypass Valve Group
76. Select a (62) 811-627C,
(AD 9/16MORB 9/16FJIC).
Screw the male ORB end into Front port ➀ of shuttle valve (46) and tighten.
77. Mate the shuttle valve (46) group to the bypass
valve (48) group at fittings (62) and (50). Tighten, so
that valve (46) port ➂ is down, and both valves align
when their Left sides are on a flat surface.
51
51
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L
F
L
F
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