We currently own two T770's, with one being a 2019 model experiencing a significant power drain issue after sitting idle for a few days. Despite having a new Interstate battery and a well-functioning alternator, the battery voltage drops to around 11.0 volts before the machine can be started. Disconnecting the battery ground cable with the ignition off reveals a current surge of around .18 amps for a brief moment, which then stabilizes at a constant draw of .07 to .10 amps. This level of power consumption while the machine is turned off is concerning. There are no visible sources of power drain such as a 2-way radio left on. Disconnecting the alternator wires did not resolve the issue. Comparing it to our other T770, which only draws .003 amps after an initial surge of .10 amps, the difference is significant. Has anyone encountered a similar power drain problem with their Bobcat T770 before?
To troubleshoot potential issues with individual controllers, it is recommended to remove the fuses for each one and monitor the electrical draw. If a controller fails to enter sleep mode after the key is turned off, there may be a malfunction. Typically, controllers will remain active for a short period before powering down. For example, on another T770 model, the draw settles at .003 amps after an initial spike. This behavior indicates the controller shutting down properly. Experiment with this method to identify any issues efficiently. As a Bobcat dealer, we have encountered challenges with these machines, and removing fuses has proven effective in pinpointing problems. Share your findings after conducting this test.
By systematically removing each fuse, I discovered that the current draw stopped when I removed the F11 GWY fuse (25 amp).
Have you checked for any error codes related to the Gateway controller fuse? When you reconnect the fuse, does the amp draw return or does it improve? Let me know if you encounter any issues.
Upon plugging in the F11 fuse, the power draw persists. While there are no active codes at the moment, there are numerous stored codes that may be a result of operators attempting to start it with a low battery. Since the battery was replaced last Friday, the machine has not been in use. With a total of 1456.4 hours logged, the most recent codes were M0309 at 1455 and 1454 hours.
I understand that the 770 model features a DEF system. In my experience with DEF machines like CASE, they clear the DEF from the lines once the machine is turned off, ensuring a complete shutdown. Do you know if your BC model has a similar process in place? Also, I'm curious to know if the DEF purge system continues to operate even after purging the system.
Answer: The excessive power drain could be caused by a faulty component within the electrical system of the Bobcat T770.
Answer: You can start by disconnecting different electrical components one by one to identify which one is causing the excessive power draw.
Answer: While power drain issues can occur in any machine, it's essential to investigate and address the specific cause in the Bobcat T770 to prevent further damage or inconvenience.
Answer: Ensuring that all electrical components are properly turned off and investigating any abnormal power draws can help reduce power consumption in the Bobcat T770.
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