C
careyo63
Guest
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
Carey
Hour meter fix
- Thread starter BurningBushFarm
- Start date
- Views: 17304
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.
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
Gold Member
same here Carey,what's CRS? russ
California
Super Star Member
- Joined
- Jan 22, 2004
- Messages
- 14,813
- Location
- An hour north of San Francisco
- Tractor
- Yanmar YM240 Yanmar YM186D
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.
OP
BurningBushFarm
Silver Member
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:
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:
C
