Backhoe NEW MT225S owner....mechanical thumb issue

[kormidoit]

The mechanical thumb appears not to be adjustable the way it was installed....take the adjustment pin out and it only drops down 2 inches from folded up position. There are three holes for further adjustment but two tabs at the bottom are prohibiting the thumb to fold out any farther. Any suggestions ?
BTW....Great Tractor. So far.

 

[workinonit]

Need some pics.

 

[kormidoit]

Apparently cant load the photo. Sorry. I'll call the vendor.

 

[PCABE5]

Could it have been installed upside down? So the tabs are at the top and not the bottom.


Just grasping without seeing the setup

 

[kormidoit]

Called the dealer and sent them pics....the tabs at the bottom need to be ground 1/4 inch to clear the bottom of the adjustment 'sleeve' as it were. Dealer said they would do it...but I advised I could take on that project...installation of thumb by dealer was correct. Just forgot to ground these tabs for proper rotation of the thumb for adjustment.

 

[PCABE5]

That's good news.

I do wonder why there are tabs in the first place if they are too large and have to be ground off.

 

[kormidoit]

Good question. In the instruction manual for the LB1300 it shows the schematic of the "optional" thumb, part number IMBH90....it shows the tabs at the bottom of the sleeve part #2. Pin #5 sets the tube where the tabs are into the base of #3. when seated, the tabs bind...& don't allow the sleeve to rotate up to allow adjustment. I suppose if I moved the sleeve up to the second hole on the base #3 it might rotate and allow rotation.

 

[kormidoit]

So, I figured it out....no grinding tabs. Pulled pin #5, moved the sleeve up to the middle of the thumb #3 to the holes and reinserted the pin #5.....now the thumb is adjustable up or down....and it forms a triangle for better strength. I am pretty sure that the reason they mounted it was for stowing...flush to the boom.

 

[Underdog57]

I'm just curious, is a hydraulic thumb available as a factory installed option on LS backhoes?

 

[kormidoit]

Don't know. I am fine with the mechanical. Moved boulders today...worked just great.