The key cutoff did not function on my L2850. Repaired with an external relay. See Attachment.
KMo
KMo
L2850 Fuel Cutoff Repair
- Thread starter Kmo
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North Idaho Wolfman
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Equipment
L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
I started out with wiring a bench test thinking I may get involved in troubleshooting the transistor circuitry. Then found the relay was energizing as it should, but no continuity through the relay contacts. My test setup was made up of 12V battery, a switch to function as the key switch ON/OFF and a tests light to simulate the Fuel Cutoff Solenoid.
There may be an easier way to troubleshoot the relay.
First, try using some type of stethoscope. With the tractor not running, turn the key ON for 15-30 seconds to charge the capacitor in the Timer circuit. When turning the key OFF, you may be able to hear the relay energize. After about 10 seconds you may be able to hear the relay de-energize. I have not tried this, but would be a simple test if the stethoscope would pick up the sound of the relay.
Second, based on my Timer circuit, check the voltage at the relay while connected to the tractor connector. Remove the Timer cover. Looking at the bottom of the circuit board under the relay,there were five terminals. One was not soldered to the circuit board. This is the Normally Closed (NC) relay contact and should have power (12V) with the key turned ON (allow 15-30 seconds). Turn the key OFF. The relay should energize and the power (12V) should be removed from the unsoldered terminal and switched to the soldered Normally Open (NO) contact terminal for a period of about 10 seconds.
Relay detail pictures.
There may be an easier way to troubleshoot the relay.
First, try using some type of stethoscope. With the tractor not running, turn the key ON for 15-30 seconds to charge the capacitor in the Timer circuit. When turning the key OFF, you may be able to hear the relay energize. After about 10 seconds you may be able to hear the relay de-energize. I have not tried this, but would be a simple test if the stethoscope would pick up the sound of the relay.
Second, based on my Timer circuit, check the voltage at the relay while connected to the tractor connector. Remove the Timer cover. Looking at the bottom of the circuit board under the relay,there were five terminals. One was not soldered to the circuit board. This is the Normally Closed (NC) relay contact and should have power (12V) with the key turned ON (allow 15-30 seconds). Turn the key OFF. The relay should energize and the power (12V) should be removed from the unsoldered terminal and switched to the soldered Normally Open (NO) contact terminal for a period of about 10 seconds.
Relay detail pictures.
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