850C TCode-439 speed sensor
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- 440 crawler
- Posts: 100
- Joined: Mon Mar 09, 2009 5:25 pm
- Location: Allegany, Oregon
850C TCode-439 speed sensor
Got an 850c with right track speed slower than left. TC 439. Could this simply be a corroded push connector? I would expect it to be on the right 1/2 of tranny towards final. Can it be reached thru door or does cab have to be jacked? Am I looking for a 2 wire connector?
If it's worth doin', it's worth doin' right.
If it is that sensor it should show on a plug in diagnoses as well. I haven't had much problem with mine but could it be that the sensor is getting a bad reading .Where do you get TC439 from my monitor only shows #s no letters ?Is that a code reading ? there are two different series of C series crawlers both have slightly different monitoring systems .start with a pressure gauge on the hydraulic and drive monitor bank first .I have only lifted the cab to clean my C by luck ! .Digitup.
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- 440 crawler
- Posts: 100
- Joined: Mon Mar 09, 2009 5:25 pm
- Location: Allegany, Oregon
Hi digitup!
Honestly, trying to find out for a fella on another site. I couldn't reach my mechanic and thought you were probably my best bet to help him out today. It had a 439 code which he said was a right side speed sensor. This had happened to me with one of ours a couple of years ago, but I called the mechanic, got on the excavator and shovel logged. When I got back it was fixed. If I remember correctly, it was just a corroded connector. Where would the right speed sensor be located and is it just a 2-wire plug connector? Accessible through the side doors? or would the cab have to be raised. He expects if he can't trace it to this, he will have to call the dealer.
Never too many questions, just not enough details from my end. I think he said it had been doing it for a while. I appreciate your help.
Dale
Honestly, trying to find out for a fella on another site. I couldn't reach my mechanic and thought you were probably my best bet to help him out today. It had a 439 code which he said was a right side speed sensor. This had happened to me with one of ours a couple of years ago, but I called the mechanic, got on the excavator and shovel logged. When I got back it was fixed. If I remember correctly, it was just a corroded connector. Where would the right speed sensor be located and is it just a 2-wire plug connector? Accessible through the side doors? or would the cab have to be raised. He expects if he can't trace it to this, he will have to call the dealer.
Never too many questions, just not enough details from my end. I think he said it had been doing it for a while. I appreciate your help.
Dale
If it's worth doin', it's worth doin' right.
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