2310D Tachometer Inaccurate

[tonyg2160]

Okay, in a previous thread(s) I've mentioned that I recently undertook the project of completely repainting my (new to me) Ym2310D. Before embarking on this project I only used the tractor to grade my driveway for about an hour. In this time, I noted what seemed to be accurate tachometer action, even up to operating range of 2000-2500 rpm (indicated by the tach). Now...upon re-installing the gauge cluster, my tach seems to only indicate a range of 0-700 rpm...no matter how much I "rev" the engine. I've triple checked and re-seated the cable in the back of the tach and all seems good. The cable is obviously spinning...even smoothly. It just seems to not register over 700rpm. I would only add that this 700rpm limit has only been observed sitting in the garage, in neutral, as I'm not ready to "roll it out" of the garage yet. Might the tach be somehow dependent on the tractor being in gear?

 

[Peter 315]

It should work in neutral , Does not matter if in a gear or not:confused3:

 

[normde2001]

no...

 

[tonyg2160]

Yeah, I didn't figure it would be. I think I even noted correct behavior in neutral previously. Any ideas on why the 700 limit now?

 

[Peter 315]

Did you or somebody drop gauge cluster ?

 

[tonyg2160]

Did you or somebody drop gauge cluster ?

No. Removed gingerly, re-painted and re-installed. Now that you mention it though...I haven't tried "tapping" on it.

 

[Peter 315]

Is the needle bent and hitting the cover, Did you paint the needle

 

[tonyg2160]

Is the needle bent and hitting the cover, Did you paint the needle

No. I just removed the cluster and taped off the gauges. I didn't remove the gauges from the panel. I painted the black plastic cluster panel. Tapping the gauge made no change. The gauge operates smoothly, but only seems to "register" around 700 rpm regardless of the engine speed. When engine off, the tach rests at about 100rpm maybe, slightly above "zero". Engine starts and the tach climbs to 700 or so. When killing the engine, the tack seems to stay around the 700 mark until the engine dies. In other words...once it gets up to 700...there is very little (if any) variance showing on the tach regardless of engine speed.

 

[California]

I 'repaired' a squeaky, jumpy tach by turning it face down and dribbling a little 'lock fluid', graphite in solvent, in around the fitting that the cable turns. That was all it needed to restore proper function.

The tach is a sealed unit so if that won't fix it, replacement is the only option. There are instrument specialists who could take apart and re-seal it properly but thats likely more expensive than a replacement tach.

But I would still suspect the cable too. Make sure it isn't stripped on either end.

 

[tonyg2160]

I 'repaired' a squeaky, jumpy tach by turning it face down and dribbling a little 'lock fluid', graphite in solvent, in around the fitting that the cable turns. That was all it needed to restore proper function.

The tach is a sealed unit so if that won't fix it, replacement is the only option. There are instrument specialists who could take apart and re-seal it properly but thats likely more expensive than a replacement tach.

But I would still suspect the cable too. Make sure it isn't stripped on either end.

Yeah, my gut is telling me that it may be the "other end" that's the issue. The funny thing is...it doesn't seem at all "erratic"...just doesn't register over about 700 rpm.