863 traction lock malfunction

My trac loc keeps engaging. As I am running the machine the trac loc will engage, I look at the bics and all lights are flashing. I can't see where it is blinking a code they just all blink steady. Manual says under or over voltage to bics?
I have to shut the machine off restart it and hit the green button. All lights are on steady. It will operate for about 12 seconds and lock back up with all lights flashing. It did this yesterday a couple times and then just went away. Not so lucky today. I had to keep restarting it about 15 times just to get it to the shop to look at it. Now that it is in the shop it won't do it???? Any advise as to where to start would be appreciated.
I have noticed a slight ticking noise when the machine is in motion. It is coming from the front wheel area. It just noticed it about when the trac loc started acting up. Don't know if that is just coincidence or not? could some thing in the brake system be hanging up?
Jimmy

That sorta sounds like your brake solenoid is playing up, it could have a damaged hold coil that will let the brake engage you then need to re-start to clear the error then it will pull the brake off but the hold coil may not have enough power to hold it off and it will let go and the brake will engage again.
Does that make any sense?
Simply put, you have 2 windings. One is the pull coil that uses high current to pull the brake plunger up. This coil can only run for short periods of time or else it will simply burn out. The other winding is the hold coil, this uses only a small amount of power and it is just used to hold the plunger in place so it can stay on more or less constantly (to an extent). If there isn't enough power in the hold coil the plunger is released and the brake engages.

Tazza said:

That sorta sounds like your brake solenoid is playing up, it could have a damaged hold coil that will let the brake engage you then need to re-start to clear the error then it will pull the brake off but the hold coil may not have enough power to hold it off and it will let go and the brake will engage again.
Does that make any sense?
Simply put, you have 2 windings. One is the pull coil that uses high current to pull the brake plunger up. This coil can only run for short periods of time or else it will simply burn out. The other winding is the hold coil, this uses only a small amount of power and it is just used to hold the plunger in place so it can stay on more or less constantly (to an extent). If there isn't enough power in the hold coil the plunger is released and the brake engages.

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Yes it does. would this coil lock the boom and tilt out also? Is this coil under the seat standing on end? When trac lock actually locks the boom, bucket and wheels from operating. What device is actually locking all of these at once? Being an electrician by trade the electrical system doesn't intimidate me too much. Just don't know where stuff is. I have a operator/maintinence manual. I am looking for a service manual.
Thank you for you help
Jimmy

Jimmy192 said:

Yes it does. would this coil lock the boom and tilt out also? Is this coil under the seat standing on end? When trac lock actually locks the boom, bucket and wheels from operating. What device is actually locking all of these at once? Being an electrician by trade the electrical system doesn't intimidate me too much. Just don't know where stuff is. I have a operator/maintinence manual. I am looking for a service manual.
Thank you for you help
Jimmy

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The BICS box actually controls all the functions and it appears its detecting a fault and locking the hydraulics....
Yes, the park brake solenoid is under the cab attached to the chain case standing on its end, it has 3 wires coming out of it, hard to miss. I don't have any way for you to test it to comfirm it is indeed your problem though, the flickering lights make me think it *may* be something else and the park brake is being released when the fault occurs. Or it could be a normal error message when the BICS box detects a problem, i can't be 100% sure on this.
It wouldn't hurt to check the connections in the harness that connects to the BOCS box and the other wires going to the other harnesses.

Tazza said:

The BICS box actually controls all the functions and it appears its detecting a fault and locking the hydraulics....
Yes, the park brake solenoid is under the cab attached to the chain case standing on its end, it has 3 wires coming out of it, hard to miss. I don't have any way for you to test it to comfirm it is indeed your problem though, the flickering lights make me think it *may* be something else and the park brake is being released when the fault occurs. Or it could be a normal error message when the BICS box detects a problem, i can't be 100% sure on this.
It wouldn't hurt to check the connections in the harness that connects to the BOCS box and the other wires going to the other harnesses.

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Thanks for your time and suggestions.
Could you tell me where the hydraulic lock solenoid would be? When the hydraulics lock would there be voltage to this lock solenoid or not?
Started it today. It started doing the same thing then just went away before I could dig in to it. I refaced all the jumps on out motocross track till it got dark and never acted up once. Would me not letting it warm up long enough be causing this lock out? Its about 30 degrees in the day time.
I have a new Boss replacement kit coming because of some digits on the hour meter display are not showing up and there is some pretty bad corosion on a couple resistors on the board behind the display. WOW they are proud of those pieces.

Jimmy192 said:

Thanks for your time and suggestions.
Could you tell me where the hydraulic lock solenoid would be? When the hydraulics lock would there be voltage to this lock solenoid or not?
Started it today. It started doing the same thing then just went away before I could dig in to it. I refaced all the jumps on out motocross track till it got dark and never acted up once. Would me not letting it warm up long enough be causing this lock out? Its about 30 degrees in the day time.
I have a new Boss replacement kit coming because of some digits on the hour meter display are not showing up and there is some pretty bad corosion on a couple resistors on the board behind the display. WOW they are proud of those pieces.

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The lift arm lick solenoid is in the control block, you will see the 2 that control the aux hydraulics but there should be one thats on its own attached to what looks like a seperate segment on the block (hard to describe).
I would doubt its heat related, there are no senders for low temperature that could lock the hydraulics out, its just a safety *feature*

Tazza said:

The lift arm lick solenoid is in the control block, you will see the 2 that control the aux hydraulics but there should be one thats on its own attached to what looks like a seperate segment on the block (hard to describe).
I would doubt its heat related, there are no senders for low temperature that could lock the hydraulics out, its just a safety *feature*

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Just wanted to let you know that I think I found the problem on the tac lock malfunction. It seemed the voltage regulator was defective and allowing the voltage to creep up to 17 to 18 volts. So, I guess the BICS was just doing it job and reporting the over voltage.
Thank you Tazza for your suggestions and taking the time to help.
Jimmy