was told it could be alternator or ground cable. Heard of it before.
535 quad trac electrical issue
Hey guys, I have a 535 quad that loses electrical power in the cab. All power is lost, switched and unswitched. Engine goes into shutdown, and brakes come on. Doesn't always die out. Sometimes get engine fault code 434. Restart and it runs every time. No set pattern to when it acts up. Sometimes goes for days not acting up. Sometimes many times in one day. Checked and cleaned all external connections. Ran an auxiliary ground and hot wire to cab, didn't help.
Any help would be great!
Any help would be great!
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Thanks, will keep that in mind. I trucked it to repair shop yesterday.
Is that a 24v system for starting? I've had trouble with that before....
Also have a freightliner truck that did the same thing, it didn't have a guage on the dash for volts unless you scrolled through and selected it. Drove it on and off for 2 seasons wondering why it would kill the dash power until one day i scrolled over and watched the volt meter. It would spike over 20v and set everything off for a second or 3, changed the alternator out and never a problem again.
Also have a freightliner truck that did the same thing, it didn't have a guage on the dash for volts unless you scrolled through and selected it. Drove it on and off for 2 seasons wondering why it would kill the dash power until one day i scrolled over and watched the volt meter. It would spike over 20v and set everything off for a second or 3, changed the alternator out and never a problem again.
I believe it is 24v.
Mechanic is really suspicious of the circuit breaker between the batteries and the cab. I hope he is right!
Mechanic is really suspicious of the circuit breaker between the batteries and the cab. I hope he is right!
I believe it is 24v.
Mechanic is really suspicious of the circuit breaker between the batteries and the cab. I hope he is right!
Hi, did you find the problem? I have a 530 quadtrac with the same problem.I believe it is 24v.
Mechanic is really suspicious of the circuit breaker between the batteries and the cab. I hope he is right!
We replaced the circuit breaker. Can't say that its fixed yet. Tractor is still in the shop for other work, maybe get it back in a couple of weeks.
We replaced the circuit breaker. Can't say that its fixed yet. Tractor is still in the shop for other work, maybe get it back in a couple of weeks.
I believe that is the starter relay. Doesn't look good. Are you having cranking issues?I think i found the problem. The circuit breaker looks bad... View attachment 167360 View attachment 167358 View attachment 167359 View attachment 167360
View attachment 167359
View attachment 167358
That does look like the starter relay switch. Those tractors, as I understand it, run on 12V off of one 12V battery except the starter which is 24V. That switch is what connects the second battery in series to provide 24V to the starter. That's why they recommend swapping your batteries around every couple years to extend battery life. The one battery is normally being used to run all tractor functions except the starter, which requires the second battery connected in series to provide the required 24V. A lot of older trucks used a similar system with a switch called a series parallel switch and it was a system that provided a constant source of headache.
Some of the electrical problems I've encountered with my 535 have been a bad battery ground cable where right at the battery the cable hadn't been pressed into the cable properly and though it looked perfect was causing voltage and starting problems. So after a couple seasons of grief I changed out all the cabling and batteries which fixed any issues I was having. Also after trying to use the old batteries on a genset discovered one of the batteries was bad even though it had tested ok..
Some of the electrical problems I've encountered with my 535 have been a bad battery ground cable where right at the battery the cable hadn't been pressed into the cable properly and though it looked perfect was causing voltage and starting problems. So after a couple seasons of grief I changed out all the cabling and batteries which fixed any issues I was having. Also after trying to use the old batteries on a genset discovered one of the batteries was bad even though it had tested ok..
I have no cranking issues.. i have the same problem as RichardZent:”Hey guys, I have a 535 quad that loses electrical power in the cab. All power is lost, switched and unswitched. Engine goes into shutdown, and brakes come on. Doesn't always die out. Sometimes get engine fault code 434. Restart and it runs every time. No set pattern to when it acts up. Sometimes goes for days not acting up. Sometimes many times in one day. Checked and cleaned all external connections. Ran an auxiliary ground and hot wire to cab, didn't help.”
Waiting a couple of years to swap the batteries is too long. Why they felt the need to start using 70s technology again is beyond me, sucked then, just stupid now
View attachment 167368 View attachment 167368 This is what the circuit breaker looks like
can you show me where it is? maybe this?it also looks bad..View attachment 167368 View attachment 167368 This is what the circuit breaker looks like
We found the circuit breaker under the cab. We opened it, this is not a convencional fuse or relay. This is a bimetal.
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which is a bad solution here. I think That is why everything stopped, and after a while (1-2 minute)the engine started as if nothing had happened. when the engine rpm is low, all the work lamps is turned on, the volt falls down a bit and the ampere goes up, the metal melts an i have code 434 befor the electric cut off. I think normal 150ampere fuse is a beter solution.
Another 🤦♂️ moment from CNH
That is the one that we replaced. Looks like the problem to me. NCNH Part # 435435A1. No longer available from CNH. You can find them on e-bay or from the company that makes them, KLIXON.. CNH $280, e-bay $58. Or substitute, like you are thinking
Maybe even run without it?? I don't really see what purpose it serves. Everything in the cab has its own circuit breaker or fuse. Maybe if you drop a wrench on the hot post in the cab?
Looks like you need to clean a bunch of electrical connections. Will be a nightmare of broken bolts, etccan you show me where it is? maybe this?it also looks bad.. View attachment 167369
This is a 150 ampere bimetal cicuit breaker(“A Bimetal Circuit Breaker is a circuit protection device that is appropriate for low voltage applications. The active element of the breaker is a strip of 2 different metals bonded together, known as a bimetal strip. Under normal operation, the strip spans a distance between two contactors, completing the circuit.”)I replace it with a normal 150A fuse…Maybe even run without it?? I don't really see what purpose it serves. Everything in the cab has its own circuit breaker or fuse. Maybe if you drop a wrench on the hot post in the cab?
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