GC2600 tachometer/squealing noise

[5030]

Glad the tach's on my Kubota's are electrically actuated and no cable but if they were, I'd pull the inner drive cable from the outer sheath and apply some lightweight grease to the inner and reinstall it. Squealing usually indicative of a dry inner cable rubbing on the outer sheath and getting ready to break.

 

[Dmacleo]

Squealing usually indicative of a dry inner cable rubbing on the outer sheath and getting ready to break.

Usually not on older GC series....
you can put a stethoscope on it from timing cover output all along cable and noise hits you on bottom side of tach where housing meets tach, thats where the "slip" clutch is.
sometimes removing housing and using light shop air into backside of tach helps.

BUT...you raise a very good point. make sure cable is good, any wear spots on insulator can mean cable itself is speeding up and down. always check the cable itself first, its a cheap (iirc 35$) fix that takes 40 minutes max.

 

[not2old]

I disconnect the cable when it happens. I've installed a zip tie to keep from losing the nut and also installed cardboard in the hood. Forgot to remove it until the motor got too warm. Just another example of Massey being too cheap to fix a poor design like the brackets that hold the steering cylinder.

 

[Racer4]

Yeah, it’s not the cable. I unhooked it and it turns smoothly. I even put tension on it, with the engine running, and the cable is silent.

Supposedly, the updated part has thinner oil in the viscous coupler that doesn’t cause the squealing when cold.

 

[Dmacleo]

I disconnect the cable when it happens. I've installed a zip tie to keep from losing the nut and also installed cardboard in the hood. Forgot to remove it until the motor got too warm. Just another example of Massey being too cheap to fix a poor design like the brackets that hold the steering cylinder.

do you disconnect dash side or engine side? been considering it but been lucky enough after 20 minutes of run time shut down restart works for me with cardboard and cleaning start of every cold season.

 

[Dmacleo]

Yeah, it’s not the cable. I unhooked it and it turns smoothly. I even put tension on it, with the engine running, and the cable is silent.

Supposedly, the updated part has thinner oil in the viscous coupler that doesn’t cause the squealing when cold.

so the new housing ITSELF is the viscous coupler? I thought that happened inside tach itself, and housing was just a gear driven 90deg change, if so thats a 100$ fix for me and I may have been wrong all along.

 

[not2old]

do you disconnect dash side or engine side? been considering it but been lucky enough after 20 minutes of run time shut down restart works for me with cardboard and cleaning start of every cold season.

I disconnect at the dash, I haven't even bothered to find the other end of the cable. I don't worry about the hour meter. Since I quit clearing the paved path to the lake I don't thonk I put more than a dozen hourts on it each winter.

 

[Dmacleo]

I disconnect at the dash, I haven't even bothered to find the other end of the cable. I don't worry about the hour meter. Since I quit clearing the paved path to the lake I don't thonk I put more than a dozen hourts on it each winter.

thanks, always wondered if doing so would cause cable to spike outwards from sheath.
I do put hours on unit separate of actual work, just going to get mail (with hydro warm up) is 20 minutes. do that pretty much daily as it warms hydro unit up.
maybe I will disconnect today and if I ever sell it just add a few hours to buyer, hell when it jumps around it tends to add approx 30 minutes per hour anyway.
in Jan 2021 I watched it jump for an hour and timed it against actual hour meter. ran for 1 hour added 90 minutes to hour meter. I figured whatever just means I change fluids more often.

 

[Racer4]

so the new housing ITSELF is the viscous coupler? I thought that happened inside tach itself, and housing was just a gear driven 90deg change, if so thats a 100$ fix for me and I may have been wrong all along.

Not exactly sure, that’s what I’m trying to find out. From what I’ve read, the part was updated for the fix. But I don’t know exactly what part or number that is.

 

[Racer4]

When looking at the instrument panel parts diagram, the only parts available related to the tach drive are that housing, a plastic gear, and a couple of washers. Or the whole cluster. The gear is just a regular gear, nothing fancy, so it’s probably not that.

 

[cdaigle430]

Would you have the part number of the gear housing that you replaced? Could this be it:

https://parts.agcocorp.com/us/en/p/housing/3756565m91

AGCO Part Number looks correct
3756565M91

 

[Racer4]

AGCO Part Number looks correct
3756565M91

Thanks and merry Christmas! Going to order one and try it out.

 

[Racer4]

Thanks and merry Christmas! Going to order one and try it out.

Ordered one today. Shipping was $15, so I went that route instead of going to the dealer. Dealer is a 3 hour round trip.

 

[Racer4]

Ordered one today. Shipping was $15, so I went that route instead of going to the dealer. Dealer is a 3 hour round trip.

I got the new part yesterday. Just put it in now. Not sure how this will change anything, as it’s just a direct drive piece. Same as the one that came out. We’ll see once it gets cold again.

 

[Dmacleo]

I got the new part yesterday. Just put it in now. Not sure how this will change anything, as it’s just a direct drive piece. Same as the one that came out. We’ll see once it gets cold again.

would be very interested in results.

 

[not2old]

I'd also be interested in the results. If it's an upgraded part and the cost is reasonable I'd fix mine. When this first happened I was told I would need a complete new tachometer. When I was given the cost, I told the parts guy, AGCO could put it where the sun don't shine.

 

[Racer4]

Maybe I’ll go out and fire it up tomorrow. Supposed to be 19 degrees. If it’s going to make the noise, it will.

 

[Racer4]

Maybe I’ll go out and fire it up tomorrow. Supposed to be 19 degrees. If it’s going to make the noise, it will.

Well, it was 19 today. Felt colder than that. Fired it up and idled 5 minutes. Then up to 1650 for a few minutes, then back to idle for a few. 10 minutes in total and no noise! was definitely colder today than the last time when it made the noise and before I changed that part. The new piece had a lot of grease in it, which had to lube everything good. A very thin grease.

 

[Dmacleo]

I notice mine mostly below 20 when its also been humid (snow/etc) out, dry air not so much. please update as you go, thanks.

 

[Racer4]

Had to clear the driveway out today. 10 F outside. Blew out driveway with no squealing at all. So far so good with this new part.