3335 AccuSet Manual Override Quick Reference Guide
3335 AccuSet Manual Override Quick Reference Guide
P/N 0256-70-01
Assy P/N 0256-70-10
P/N 0256-70-01
Assy P/N 0256-70-10
Welcome to the Quick Reference Guide for the AccuSet manual override operation for raising and
lowering the drill. Please refer to the Operator’s Manual for complete instructions.
In the event that there is an issue with the Bourgault AccuSet Implement Controller ECU, that
prevents the raise and lower operation of the drill, there is a manual override harness provided
to by-pass the ECU.
Important:
The intent of this harness is to act as an emergency service tool and should not replace
the operation of the ECU.
Using the AccuSet Manual
Override Harness
1. Ensure a safe state of the drill. Turn off all
hydraulics and remove the tractor key from
the ignition.
2. Carefully take the harness out of the storage
container and unfold.
3. Remove the harness connectors from CH 1,
2, 3, and PWR on the BIC ECU.
4. Plug these connectors into the Manual
Override Harness with their respective labels.
AccuSet Channels pair with CH’s 1, 2, and
3 (order not important), and “AccuSet ECU
PWR” to ECU Power.
a. At each of the AccuSet hydraulic blocks at
the base of each axle, you need to unscrew
the Counterbalance Valves to permit the
QDA cylinder to rest on the shims.
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b. These are labelled CB1 and CB2. Unscrew
each one approximately 3 revolutions to
permit the oil to flow past the CB valve.
You will need to restore this number of
turns when you repair the AccuSet ECU.
C A U T I O N : D o n o t f u l l y u n s c r e w
Counterbalance Valve as there is no low
pressure stop to limit disassembling the
cartridge.
c. Repeat this step for each of the 12
Counterbalance Valves on all 6 hydraulic
Blocks (8 valves on 4 blocks for a 40’
drill).
5. Ensure operator and all bystanders are in safe
position and not in any pinch points.
6. Turn tractor back on and engage the opener
circuit hydraulics.
7. You can now use the manual override harness
rocker switch to raise and lower the drill.
8. Raise the drill up, and use the QDA shims to
set the frame height for the desired seed depth.
9. Use the rocker switch to lower the drill onto
the shims.
10. Walk around the drill to check that each QDA
cylinder is resting on the shims. Check the
seed depth to verify the depth setting.
Removing the AccuSet Manual
Override Harness
11. Once the BIC ECU is repaired, ensure a safe
state of the drill. Turn off all hydraulics and
remove the tractor key from the ignition.
12. Unhook the manual override harness, and plug
AccuSet harness connectors back into ECU
CH’s 1, 2, and 3 (order not important), and
ECU PWR back into PWR.
a. Return to each of the 12 Counterbalance
valves on the 6 hydraulic Blocks and turn
back in the Counterbalance valves. You
will need to restore the three revolutions
that were unscrewed in the earlier
procedure. These are labelled CB1 and
CB2. If you have lost your place on the
CB valve, the origin setting for the CB
valve was approximately 3.5 revolutions
from fully seated (fully screwed in).
b. Lock nut on cartridge to prevent migration
of Counterbalance Setting.
13. Ensure operator and all bystanders are in safe
position and not in any pinch points.
14. Turn the tractor back on and engage the opener
circuit hydraulics.
15. Test the operation of the AccuSet with new
ECU. Repairing ECU’s within the app may
be required.
Note:
Always store override harness in storage
container.
How NOT to Use the AccuSet
Manual Override Harness
1. Do not use this override harness as a
permanent solution. Repair ECU as soon as
possible.
2. Do not disconnect ECU connectors to
install harness while tractor is powered, or
hydraulics are on.
3. Do not operate the override rocker switch
while bystanders are on or near the drill.
4. Do not pressure wash the rocker switch.
5. Do not operate drill with the rocker switch
held in either the raise or lower position.
6. Do not operate Drill with Corrected or
Repaired ECU and Counter Balance Valves
not restored to original condition.
CH1 CH2 CH3
POWER
OVERRIDE
HARNESS
STORAGE
Bourgault AccuSet Implement Controller ECU (BIC ECU)
AccuSet Manual Override Harness
Rocker switch
AccuSet Hydraulic Block
