BX2360 Tachometer question

[BlueRidgeRunner]

Hi,

I am new to Kubota tractors and this forum. I just recently purchases a Kubota BX2360. I was looking at the operators manual which says that the small lcd display that shows the hours will display the rpms after starting up. Mine shows the tach for a few seconds when I turn the switch on then displays the hours. It never shows the rpms when operating just hours. Did I miss something?

Any help for this newbie would be appreciated.

 

[BlueRidgeRunner]

New update on the hour meter/tachometer problem. Got some time to do some mowing with the tractor this weekend. Found out that the hour meter is not registering usage. It displays the hours but they don't change when running.

 

[GreensvilleJay]

Assuming that the 'real' tach does work, then I suspect the 'panel' computer is defective.
Need to see the wiring diagram of your machine but on my BX23S a signal comes from the alternator so if the tach works, the hours should update but I've never seen the source code to see 'how-it-works'.
Your panel is different but similar to mine, I'd think.

 

[Sidekick]

On my bx2360 rpms control the hours. The higher the RPMs the faster hours are accumulated. If the tach isn't talking to the hour meter then no hours would accumulate. I would check wiring to be sure someone didn't disconnect the tach sensor to keep the hours on the machine down. I don't know what the trigger is but could be something with that. Would be best to find a wiring diagram for it.

 

[GreensvilleJay]

from the wsm @kubbooks...
The electrical hour meter and tachometer is equipped
on the meter panel.
This meter indicates the operated hours when the
main switch is turned to “ON” position.
After starting the engine, this meter indicates the
present engine revolution.
The meter picks up the voltage from the IC regulator
located in the alternator.
The IC regulator sends a signal of the engine
revolution to the meter.
The meter calculates the signal. It changes and
indicates the signal to the engine revolution in
cooperation with the voltage.

so if RPM isn't being shown, then either the wire from the tach is open, the connector at alternator is open or the alternator is defective.

If battery voltage is more running than engine off, alternator is probably fin.
I suspect the 3 pin connector. Disconnect and reconnect 3-4-5 times, then test by starting engine up.

I don't see how RPM can or should affect 'run time' hours. To understand that , I need to see source code for the 'tach/time' module.

 

[Sidekick]

I have noticed if I run wide open mowing my hours accumulate the same as my watch. If I pull a trailer or sweeper around at 1200 to 1400 rpm my hours accumulate less then watch time.

 

[GreensvilleJay]

Interesting. That indicates that 'they' have incorporated some 'math' into the 'hour timer' program to adjust 'run time' based upon a certain speed maybe thinking that less RPM is less 'wear and tear' on the engine. Now wondering if 'they' reworked that code for engines with DPF on them ?

 

[Sidekick]

Interesting. That indicates that 'they' have incorporated some 'math' into the 'hour timer' program to adjust 'run time' based upon a certain speed maybe thinking that less RPM is less 'wear and tear' on the engine. Now wondering if 'they' reworked that code for engines with DPF on them ?

My RTV and zero turn seem to go by key on time but the bx is different. It works out about to .6 gph on the meter fast or slow.

 

[GreensvilleJay]

re: My RTV and zero turn seem to go by key on time

that's plain NUTZ ! Engine's NOT running, but the hour timer says it was ???

If seen engine hour meters connected to oil pressure switch,super simple and as long as engine HAS oil pressure, time is counted.

 

[BlueRidgeRunner]

Thanks for all of your input. Will check to see if wiring is disconnect.