AGROWPLOW AD230 User manual
AD230 CLUTCH UPDATE
Updating the clutch to a spring-tensioned model to decrease wear and fault potential
Why have we made this change?
The original AD230 clutch offered a reliable method of ensuring the seed drill’s drive engaged and disengaged
quickly and effectively. However, it required precise calibration. Some users have found it difficult to ensure that
the clutch was calibrated effectively and experienced premature wear on their clutches as a result.
This update modifies the clutch design, making calibration easier, increasing error tolerance, and decreasing
potential wear.
What has changed?
Clutch slide
The modified clutch slide incorporates a set of springs on the hub-facing side.
These springs create tension against the drive sprocket to ensure neater
engagement against the dog clutch. It also has a wider channel to
accommodate the clutch fork, offering greater tolerance during calibration.
Clutch drive
The new clutch drive is zinc-plated instead of painted. This reduces the friction where the roll
pins engage with the drive is lower, resulting in less wear.
Clutch fork wear plate
The new design has changed from steel to a nylon wear plate. This material minimises
wear and is easier to replace if the fork should rub against the interior of the channel in
the clutch slide.
Dog clutch offset washer
This washer offsets the position of the clutch lever arm assembly, making adjustments
to the position of the clutch fork easier.
Page 2
Tools & Parts Required
AD230 Clutch Kit (provided)
ITEM NO.
PART NO.
DESCRIPTION
QTY.
1
132-2006
Clutch slide spring
x2
2
640-4077
Clutch slide (includes 452-2062 bush sleeve)
x1
3
640-4360
Roll pin 10x25mm
x2
4
640-4075
Clutch drive (includes 640-4205 bush sleeve)
x1
5
112-4036
Roll pin 5x35mm
x2
6
133-4134
M12x40 Hex bolt flange bolt
x2
7
640-4082
Clutch lever pull (includes 640-4205 bush sleeve)
x1
8
140-4121
Roll pin 10x70mm
x1
9
640-4324
Seed drill dog clutch nylon wear plate
x1
10
134-4016
M12 hex nyloc nut
x2
11
640-3087
Clutch lever pivot (includes 640-4205 bush sleeve)
x1
12
640-4357
Clutch offset washer
x1
Page 3
Process
Before you start
●Watch the AD230 clutch update video to familiarise yourself with the process.
●Download and familiarise yourself with the AD230 Parts Manual, especially pages 36-43. Keep a copy
on-hand while performing the update.
1. Preparation
1. Raise the AD230 into a disengaged position to remove pressure on the drive and clutch assemblies.
2. Check appropriate safety measures. Lock the hydraulic pressure off, take the keys out of the tractor apply
park brake and insert the safety chocks in the wheel hydraulics.
3. Remove the clutch bay guard by undoing the two hinge bolts on either side.
4. Remove the Farmscan pickup sensor (640-4171 & 114-3023) from the side of the clutch bay.
2. Disassemble clutch assembly
1. Loosen the chain tensioner (640-4240) and unhook the tension spring (640-4203) from the clutch lever
assembly.
2. Remove the bolt that links the clutch lever assembly to the clutch arm. Lower clutch arm (640-4140) from
the clutch lever assembly.
3. Remove the chain (640-5008) linking the clutch assembly to the drive wheel to gain access to the roll pins
on the sprocket. You may need to remove the chain link to do so.
4. Remove the clutch lever pivot (640-3087).
5. Knock out the roll pins (112-4036) from the clutch drive shaft.
6. Knock out the roll pin (140-4121) mounting the clutch slide to the clutch shaft.
7. Remove the five nuts mounting the uni-hub (161-0120) to the side of the clutch bay.
8. Gently slide the clutch shaft and hub towards the centre of the seeder to allow enough clearance to
remove the sprocket (640-4076) and clutch drive (640-4075) from the clutch shaft.
9. Remove the nut on the hub side of the clutch lever assembly. This will allow you to remove the clutch lever
shaft (640-4081), along with the remaining parts of the lever assembly.
10. Remove the clutch slide (640-4077).
Page 5
3. Assemble the new clutch assembly
1. Unscrew the grub screws securing the drive sprocket (640-4076) to the old clutch drive (640-4075). Wipe
down the grub screws, apply a thin layer of thread locker, then secure the sprocket to the new zinc-plated
clutch drive.
2. Wipe excess dirt from the clutch and clutch lever shafts and the interior of the clutch assembly bay. Brake
cleaner spray will make this easier.
3. Apply a generous amount of grease to the clutch and clutch lever shafts.
4. Fit the new nylon fork (640-4324) to the new clutch lever pull (640-3086). Be sure to note which side of the
clutch lever pull the wear plate is mounted to (see parts manual p41) .on the left of the clutch slide.
5. Swap the Farmscan magnet (640-4234) to the new clutch slide (640-4077) and refit it to the clutch shaft.
You may need to adjust the position and angle of the hub and clutch shaft to provide enough clearance to
fit the clutch slide.
6. Fit the assembled nylon fork and clutch lever pull to the clutch lever shaft and replace the assembly in the
clutch bay, ensuring the fork is resting in the channel in the clutch slide.
7. Fit the new springs (132-2006) in the clutch slide.
8. Put the new clutch drive and sprocket back on the clutch shaft. You may need to sand back the igus
bushes prior to fitting if they have been replaced.
9. Tighten the five nuts around the uni-hub and tighten the nut securing the clutch slide shaft on the hub
side of the clutch bay.
10. Replace the roll pin (140-4121) that secures the clutch slide on the clutch shaft. Ensure the roll pin is flush
with the clutch slide.
11. Replace the clutch lever pivot (140-3087) and spacer washer (135-3036) onto the clutch lever shaft,
followed by the nut.
12. Reattach the clutch arm to the clutch lever pivot.
13. Refit the clutch lever spring.
14. Hammer in the new roll pins (112-4036) on the end of the clutch shaft.
15. Refit the chain on the drive sprocket, the chain tensioner, and the Farmscan pickup sensor.
16. Use a grease gun to apply lubrication to the grease nipples on the clutch slide, the clutch lever pull, and
the clutch fork groove on the clutch slide.
Page 6
4. Calibration & testing
Ensure the drill is on a flat surface where both the wheels and tynes can touch the ground at the same time.
The clutch fork should be positioned centrally within the channel of the clutch slide. It requires a minimum of 1mm
between the fork and either outer edge of the channel.
Adjust the position of the fork within the clutch slide channel by tightening or loosening the M16 nyloc nut
(134-4022) on the end of the clutch fork shaft.
Raise the drill off the tynes to ensure the mechanism stays in place when the drill is raised and lowered, and
correct disengagement is applied when the drill is fully raised to ensure that the clutch is disengaged whilst in
transport mode.
Test both clutch engagement and positioning of the clutch fork several times to ensure the clutch fork is correctly
adjusted. This can be done by repeatedly engaging and disengaging the clutch as the seed drill is towed through a
paddock.
NOTE
If this upgrade is being performed as part of a
warranty claim, ensure suitable documentation
is captured as proof of completed work,
including photos and paperwork.
Page 7
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