Hour meter fix

[BurningBushFarm]

Here's another question:

YM2000D hour meter had stopped running last month. Tach works.

Husband hasn't got to it, but he plans to see if it's a simple fix.

It is a cable?

Would be good to have it running so we can keep track of maintenance.

Thanks!

 

[California]

It is a sealed unit and is replaced complete. Hoye must have them.

A local speedometer shop might have the tool to seal it back up after repair but I doubt they could match the price of a replacement.

If the needle works then the cable that drives it is ok.

On this model it should take 5 minutes to remove/replace the tach.

 

[clemsonfor]

My tractor would make a weird screach every now and then. This was a few months ago on my last round of field bushhoging. I heard it once or twice, then the hourmeter went crazy and pegged off the chart. I idled down to check it. What happened was the nut that secures the cable to the back of the meter had vibrated loose, causing an erratic connetion. Tighted it back up and good to go. Have only put a handfull of hours on since then, maybe 4, so im not sure how often i have to check this again. I did not use pliars as i was actually on it working at the time, and did not feel like digging in the toolbox at that moment.

 

[BurningBushFarm]

The tach worked. It was the hours meter that crumped out. Before we spent $80 hubby thought he'd take a looksee.

So he took the unit out and opened it up. (That was a bit of a chore.) Wanted to see if there was a gear broken or something. Never did see what the problem was. Fiddled with it and checked all the little gears ... it seemed that everything was meshing and all turned -- so put it back together and remounted it (that's a bugger ... my hands are smaller and I was still standing on my head trying to get one of the nuts on and tight.

Voila! It works. At least for now ...

I am loving this machine.

Neighbor with all the green machines stopped as we were unloading the bush hog ... he pointed out that the engine in his track hoe is a Yanmar. :thumbsup:

 

[Sumpter]

Chances are you had a loose wire and it was tightened when put back in.

 

[California]

No electrics in these tachs! Not even illumination. Pure old-school all-mechanical technology.

BBF how the heck did you get the tach case back together? I thought these were sealed like a can of beans.

Hmmm. Maybe I'll attack the one in my YM186D. When it hasn't been run for a couple of weeks it screeches and the needle pins for the first minute or so. I was eventually going to replace it. I assume the tach cable spins a magnetic cup that should move the needle, like the old British motorcycle tach I took apart once. In that case the magnetic cup or the needle's iron 'follower' had become rusty, and dragged.

 

[clemsonfor]

No electrics in these tachs! Not even illumination. Pure old-school all-mechanical technology.

BBF how the heck did you get the tach case back together? I thought these were sealed like a can of beans.

Hmmm. Maybe I'll attack the one in my YM186D. When it hasn't been run for a couple of weeks it screeches and the needle pins for the first minute or so. I was eventually going to replace it. I assume the tach cable spins a magnetic cup that should move the needle, like the old British motorcycle tach I took apart once. In that case the magnetic cup or the needle's iron 'follower' had become rusty, and dragged.

Cal, look at my post above. That is exactly what mine did. The cable at the back of the tach was loose. I tightened it up and thats all it took!

 

[clemsonfor]

The tach worked. It was the hours meter that crumped out. Before we spent $80 hubby thought he'd take a looksee.

So he took the unit out and opened it up. (That was a bit of a chore.) Wanted to see if there was a gear broken or something. Never did see what the problem was. Fiddled with it and checked all the little gears ... it seemed that everything was meshing and all turned -- so put it back together and remounted it (that's a bugger ... my hands are smaller and I was still standing on my head trying to get one of the nuts on and tight.

Voila! It works. At least for now ...

I am loving this machine.

Neighbor with all the green machines stopped as we were unloading the bush hog ... he pointed out that the engine in his track hoe is a Yanmar. :thumbsup:

All the green tractors, except the big ag tractors have yanmar engines in them. I think its the whole compact/utility and sub compact line.

 

[California]

The cable at the back of the tach was loose. I tightened it up and thats all it took!

Thanks! I tried that first. Then I removed the cable core, cleaned and lubed it with a parafin stick plus oil, then reassembled it and snugged up the connections at both ends. And re-routed the cable. I thought it might be a kinked cable. But that maintenance made no improvement. I'm pretty sure the problem is inside the sealed tach case.

The tach shows around 930 hours. I was going to replace it when it rolled over.

I thought these had a collar between the case and the glass that is crimped all the way around, and would be impossible to re-seal securely. But BBF's post has encouraged me to attempt repair before giving up on it.

 

[6thgpSF]

correct me if I'm wrong but I thought the hour meter only works when your up to recommend rpms,like 2100 or so? russ

 

[careyo63]

I believe in sequence with Amount Of Time For the RPM's of the motor That seems to be the way mine works. In idle it doesn't hardly move.

Carey

 

[winston1]

My owners manual says the hours are calculated at about 2200rpms. My understanding is you get possibly a little higher number if rpms are higher or a little lower number if rpms are below 2200. Reads all the time, just not quite as accurate as a clock because it is relying on rpms to calculate.

 

[winston1]

I stated earlier can't type and CRS either at least I'm not all that slow Winston1:laughing::laughing:

My response was to Russ's post, you and I were responding at the same time. OK Carey, I'm old and slow, what does CRS mean??

 

[6thgpSF]

same here Carey,what's CRS? russ

 

[winston1]

Nope, didn't know that, I'm not very good on abbreviations and can't remember them anyway.

 

[California]

correct me if I'm wrong but I thought the hour meter only works when your up to recommend rpms,like 2100 or so?

It's a simple mechanical connection. The front of the tach cable is driven by gears in the front cover somewhere near the camshaft drive gear. The instrument end of the cable spins a reduction gear, directly in proportion to crankshaft speed, and then reduction gears drive tenths, hours, etc.

What it really counts is simply revolutions. If you keep the throttle at pto speed (2200 - 2600 depending on model) then the tenths and hours on the dial will match your wristwatch. I tend to putter around at 1100 rpm using the loader and run 1400 for the backhoe which is run from a pto pump, so my tach hours showing at the end of the day are maybe half of clock hours. It's a maintenance reminder, nothing more, on these older tractors with 3-digit hourmeters. Nobody knows how many times the tractor may have rolled past 999.9 hours.

I think on modern equipment the tach is electric and the hours shown are real clock hours.

 

[BurningBushFarm]

The tenths turns over after 6 minutes at 2400 RPM. I figure (as someone said elsewhere, I think, on another hour meter thread) that if you run at 1200 it takes 12 minutes?

My little bit of seat time has included a lot of 1500 RPM time using the FEL. It seemed like it wasn't running , and I thought "dang! " and looked down a minute later and it had flipped.

Also doesn't seem to do it gradually like a car odometer (for us people who have the old timey ones... not these whiz bang digital thingeys). It's either a 2 -- or a 3. Or whatever. None of this sliding into the next digit.

Wish I'd thought to take pictures of its innards. We didn't know you couldn't take them apart It WAS hard to get it apart, but my husband is persistent. I'll ask him tomorrow to elaborate. WE did end up crawling around the kirtchen floor looking for a little teenty bushing or some such thing ... which wan't on the floor ... it (whatever it was) had fallen inside instead.

That and I was on my hands and knees in the garage looking for one of the little nuts that holds it in the bracket... lucky again.

Did I mention I like this tractor? :laughing:

 

[careyo63]

That and I was on my hands and knees in the garage looking for one of the little nuts that holds it in the bracket... lucky again.

It's amazing how that always seems to happen and I never seem to get much done with the task at hand when the Wifey helps me in the shop. :laughing:

Carey