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It was the sender. I ordered through keno and had to unfortunately get a new tach w/ it too, as they would not separate the order. The sender + tach was about $60 bucks and took a week or two to get in the mail. The original tach was fine. I plugged it in, started up the dozer and we're in business. The dozer is now for sale as I haven't needed it for about a year and a half. It has just under 40 hours. I'm in Northern CA and asking $9000. it has shuttle-shift, rubber tracks, a 5' box scraper.
Brock
530-680-6678 cell
Chico, CA
Still don't have the tach working. I hooked up my voltmeter to the output pins of the sender. No voltage at all at idle. I guess this means I don't need the oscilloscope to test. In terms of removing the tach sender, do you simply loosen the two bolts by the sender to remove the entire unit? or does the whole unit unscrew itself?
Guess it's time to replace it.
Thanks
Brock
Bob,
I took a quick video w/ my phone of the behavior I am seeing. I spoke to Mark at Keno today and he said there is a regulator under the dash that might be a problem They go bad. Also my indicator light won't come on when the dozer is running. Here's the youtube link. I have 12v when everything's off, and 13-14 when it's running.
Mark at Keno said that I should order a regulator before an alternator.
Link to youtube video –
Brock
Did some more research tonight.
I think it might be the alternator =(
I started it up and then unplugged the negative battery cable. All the lights went off. put a DC meter on the output of the alternator = 0 volts
Is this something Keno tractor can replace? What does Bob Rooks recommend?
I guess I should expect this when it sits so often.
Thanks
Brock
My tach on my yuchai dozer won't work again. I tried the sender on the bell housing by loosening it, tightening it, backing out 3/4 turn to no avail. It seems like an electrical problem. Everything else on the dash works, all dash lights work, front headlights and rear lights,the tach responds when I turn on the key but it won't respond and show RPM's once the engine is started. I originally had this problem intermittently a few years ago and now it's back. The dozer sits quite a bit and I only start it and move it every month or so. It's going to be sold shortly and the tach definitely needs to work before it goes on craigslist. Overall these dozers hold up pretty well. I've had it for three years+. I've checked all connections under the dash and all tach wires are hooked up from what I can tell.
I put a multi-meter on the output signal from the two leads on the bell housing to no avail. I put the multi-meter to AC and it showed zero volts. Any recommendations or something else that could be the problem? I do have access to an oscilloscope, but would prefer another route.
Thanks
Brock
