2019-03-08
196-359M
3N-4010F, 3N-4010HDF, and 3N-4020F
Troubleshooting
92
power/comm cable to cab console and external
controller.
d. If power/comm cable tester shows power and
communication is reaching external controller
from cab console, and no lower line appears on
cab console, replace chip or external controller.
Call Service Department.
e. If Cable Continuity Tester (p/n 27859) isn’t
available, check cable with voltmeter at
connection at control module.
3. Test Relay inside external controller:
a. Use Relay Output Tester (p/n 27860) to test
relay inside external controller. Install tester to
weather-pak solenoid connector from external
controller. With tractor engine off, start drive
calibration function. Auditory alarm should buzz
for 1.5 seconds when drive is engaged in
calibration mode. If no alarm, relay or external
controller may need replacing. Call Service
Department.
4. Check hydraulics:
a. Check hydraulic lever is in detent position.
b. Hydraulic lever is in wrong detent direction - a
check valve at outlet of motor prevents reverse
rotation.
c. Make sure that both hoses are properly
connected to tractor remotes.
d. Inadequate system pressure. Gauge pressure at
filter and check reading. If system pressure is
below tractor specifications, check system.
e. Power solenoid directly:
Rapid drive rotation may occur causing serious injury.
i.
Disengage hydraulics.
ii. Reduce flow to 30-50%.
iii. Power solenoid directly by connecting power
weather-pak connector to solenoid
weather-pak connector. If drive doesn’t
rotate, Proportional Coil (p/n 19799) may be
defective. Check continuity with meter, or
energize with 12v power and check for
magnetic pull with small screwdriver.
Double-check connections on solenoid
cable. If solenoid energizes but drive does
not rotate when powered directly, tractor
hydraulics are not properly engaged.
f.
Excessive torque in drive system. Disconnect
main drive chain to check for rotation under zero
load. Check for a problem with the mechanical
portion of drive, such as foreign material or
swelled grain wedged in meters, frozen
bearings, misaligned chains. Install pressure
gauge at motor inlet. Pressure should be
1000-1500 psi. If pressure is above 2000 psi,
significant torque problems are present.
5. Check Speed signal (if drive rotates in calibration
mode but not when planting)
Rapid drive rotation may occur causing serious injury.
a. No signal from speed sensor - check connection
at sensor and at drive controller.
b. Use Speed Simulator (p/n 27858) to
troubleshoot speed loop. Leave tractor
stationary and drive hydraulics do not need to be
engaged.
c. Test speed sensor and hall effect sensor;
replace sensor if simulated speed appears on
cab console.
d. Test speed cable between speed sensor and hall
effect module; replace cable if simulated speed
appears on cab console.
e. Test hall effect module and cable to external
controller; replace module and cable if simulated
speed appears on cab console. If speed does
not appear, external controller or chip may need
replacement. Call Service Department.
Drive rotates but not at desired speed:
6. Drive (out rate) fluctuating erratically:
a. If indicated field speed on drive is also
fluctuating erratically, troubleshoot speed signal
loop.
b. If field speed is steady, check for loose set
screws on motor encoder, contamination of
proportional valve, or mechanical binding of
chains.
7. Indicated speed fluctuating erratically:
a. Use speed simulator to troubleshoot speed loop.
Leave tractor stationary and drive hydraulics do
not need to be engaged. If steady speed
between 4-10 mph appears on cab console
using speed simulator, troubleshoot radar and
hall effect module. If steady speed does not
appear, external controller may need
replacement. Call Service Department.