I have a Bobcat 763F that I am in the process of painting/rehabbing. As part of the process we removed the heater and the seat. Because of the amount of rust in the cab there was no turning the bolts so these items were more or less torn out. Now that we are getting things put back together the machine won't start. When you turn the key the display in the upper right does not turn on and does not beep. There is no seat switch on this machine. The only lights on the BICS module are 'system active' 'traction ' 'hydraulic' 'seat bar' and 'power'. When you turn the key forward on click all the lights come on and flash then they all shut off except power. If you put the bar down the seat bar light come on and if you push the 'push to operate' button the traction light comes on. When you turn the key to the start position the engine will turn over but not start. If you hold the fuel solenoid over the machine will start but won't shut off unless you let go of the fuel shut off. I have checked all the fuses (only found 10 fuses in two small fuse blocks on the engine) and put di-electrode grease on them. The only other pertinent information that I can think of is that we did remove the BOSS controller from the back of the cab while looking for heater bolts. When we re installed it we could not get the bolts tight because of the amount of rust on them. I don't know if maybe the BOSS controller grounds through its bolts or something. Any help would be greatly appreciated.
Help Support SkidSteer Forum:
It may be time to probe around for power...
How did the fuse holders look? they are prone to getting corroded and failing. If one does fail, you can splice in an inline holder. Far cheaper than a new harness.
If it's totally dead, i'd suspect a fuse or a connector that was disconnected when you pulled it down. Even cehck the battery condition.
Well that one fell right into the KISS category. I had visually inspected all the fuses and they all looked good. Before I dug into the BOSS controller I decided to check continuity across all the fuses. There was one bad fuse that I replaced and there ya have it.... but now for the new problem. This one has to do with the BISC. While we were trouble shooting the BOSS issue I did make sure the traction lock was working and it did. That was 3 days ago. Now it does not work. I can start the machine no problem and all the lights on the BICS light up except for the Traction Lock. When I push the button nothing happens. Where do I start with this one? Thanks for the help.
Check the fuse and fuse holder, also check the relay. Both can go bad.
If it still doesn't work, check for resistance on the solenoid. Red/black and white/black.
Also, depending on what style of brake you have, some had a pedal with a switch on the floor, the switches go bad and the brake may not turn off. Same with on the dash, there is generally a rocker switch on the newer style.
Once again.... simple enough that I can fix it. I took the brake relay and put it on the starter and it fired up no problem so I decided relay was not the issue. Hooked the relays back up and tried it again. Fired up and brake released. I guess it was just a bad connection. Thanks for all your help.
reaperman
Well-known member
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- Dec 18, 2011
- Messages
- 668
Its a good idea to put dielectric grease on the terminals of your relays and fuses. They can get corroded up and cause issues, plus its cheap insurance.
Yep. I figured since I had it apart that was the time to do it. Funny that this machine ran like a top until we started working on it and now its fighting us every inch.
