Greetings all, Curious if anyone can speak to why my JD 260 skidsteer engine shakes violently but operates well otherwise. It shakes so much it breaks the alternator tension adjustment arm. The shake dissipates at higher rpm but does still shake. Definitely worse at idle and low rpms. All articulations function normally and operations are good. In other words... we are not prevented from using the machine tho it would be better if it didn't shake so much.
The 3 cylinder deeres always did have a shake cjeck you front engine well rear the fan end i had a 260 in the other week had the bolts busted off
We did have an engine mount bolt that was broke and we replaced it. This was some time ago. Thought it may have been the culprit but after replacing it the engine still, and always, has had a major shake since we have owned it. I have believed that the 3 cylinder diesel variant was responsible but had hoped that surely JD would not put such an engine aon the market with that kind of shake. Apparently they would. Outside of the shake the unit has mostly worked well for us. It has had it's issues for sure.
What kind of shape was the coupling in that drives the pump?
3029 engine by chance? They are rattling monsters. At 1800rpm in gensets they shear off exhaust flanges, break welds on muffler mounts and snap off the fender mount style starter solenoid brackets.
Correct. And like you said they rattle.
Not really related to your skid steer, but i have a John Deere Gator with a yanmar diesel that rattles to pieces at low idle until it gets warm. I also have a John Deere 755 compact tractor with an older version of the same Yanmar that does the same thing. That one did eventually break the motor mounts, but still shakes violently until it gets warm or you increase the throttle.