2013 bandit 75xp bad jamming problem behind feeding wheel

E

erwin

Participating member
Location
st. louis
I have this one with the original 25 hp engine. Been working well till a few days ago. Some wood chunk goes behind the feeding wheel and end up vertically jammed into the space between feeding wheel and the chipper body sheet metal. The sheet metal is not that heavy so it got pushed out more and makes it even more vulnerable to happen again after clear it out.

I can’t understand why this would happen. The clearance between feeding wheel and the surrounding body metal should be small enough not to allow the to happen.

It got so bad yesterday finishing up some small stuff. It James almost every 10 min, even small long honey suckle stuff.

Anyone have experience with this and know a solution? Thx. Erwin
 
If you have checked the knives and they are ok, slow the feed wheel speed on stringy shrub materials. I push knives past dull and a couple hundred bucks for a new set usually fixes my troubles
 
The chipper had been working the way it should, not nearly as powerful as the other 6” bandit I have that I put a 40hp Kohler, but good reliable one.

It just happened a few days ago, checked knifes and anvil. They’re all in good shape. Again it jams all the time and it’s very hard to get the jammed wood out since it’s wedged there.

An observation might be related to this. The front end of the feeding valve is leaking out fluid, not too much. Don’t know if the jamming causes pressure to go up and cause leak or the valve is causing the jamming.
 
Low pressure will cause auto feed function to not work. Sounds like it is feeding faster than it can chip. Full stems of old shrubs are super dense
 
I own a 75xp as well and struggle with the exact same issue. On my machine it is somewhat species dependant and is most consistently an issue when chipping deadwood. I have yet to find a "silver bullet" but I absolutely do notice that the issue recedes when I swap to fresh knives, though it still can jam in the way you describe with brand new edges.

I believe that there is too much space behind the infeed roller and have thought about having some flat steel plate welded in that box to narrow it slightly, maybe even 1/4" plate would do it; haven't pulled the trigger on it though. If I do and it fixes the issue, I'll let you know and share pics.
 
joshuarov said:
I own a 75xp as well and struggle with the exact same issue. On my machine it is somewhat species dependant and is most consistently an issue when chipping deadwood. I have yet to find a "silver bullet" but I absolutely do notice that the issue recedes when I swap to fresh knives, though it still can jam in the way you describe with brand new edges.

I believe that there is too much space behind the infeed roller and have thought about having some flat steel plate welded in that box to narrow it slightly, maybe even 1/4" plate would do it; haven't pulled the trigger on it though. If I do and it fixes the issue, I'll let you know and share pics.
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I’ve been thinking about the same fix. Let me know when u get to it. Have a brand new set of knifes now. Will see.
 
erwin said:
I’ve been thinking about the same fix. Let me know when u get to it. Have a brand new set of knifes now. Will see.
Click to expand...
Decided to address this issue so I’ll have a reliable backup chipper. A winter project.

After posting this thread, I put a set of brand new knives and it’s been working for maybe a total of 10 hours and misbehaving again.

Started removing the two pivot bearings (easy surprisingly) and free off the feed wheel assembly this morning.

Will lift the assembly off the machine this afternoon. Already tried before lunch break. It’s harder than I thought. Might have to grind off the bracket for the safety sensor.
 
It’s quite a chore to remove the roller assembly. According to rough measurements, no good way to do any meaningful measurements, half inch will not create clearance problem at that plane. Added three extra little support on top since no way of welding underneath.

I know putting the assembly back will b pretty tough as well. So I leave it to tomorrow.
 

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Pretty sure it should solve the jamming problem. Well if not, not a problem either. I’m not opening this up again to add more metal.

I already planned to upgrade the punny 27 hp to a 40 hp engine which I did to my 2003 65. Part of the problem is that the fly wheel is underpowered. Once it’s upgraded, the feed wheel will barely keep up.
 
Got the roller assembly or the yoke in last night. Roller turns freely so half inch bar is not too much.

Found out that the reason it’s so hard to get it out and in is the position of the lifting ring. It’s positioned a little too much to the front so the bearing brackets on it can not clear the two shafts that the bearings go into. I have to come up with something u see in the picture to pivot it while lowering it into position.
 

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Anyone want a new set of 75 XP knives and a couple of bolts for $50 to cover shipping and change?

By the way I dress the knives to keep at better performance on my chipper(s). I have been using a "Garden Sharp" hand dresser that only dresses the cutting face for almost a year. So much better than knife style carbide dressing tools which give an unwanted backbevel on the knife.

I would estimate that my chipping performance with dressing is about 95% of new knife performance. Whereas I used to feel like it was 70% of new knife performance after I needed to start dressing them.
 
Is that an armchair assessment of single bevel versus a back bevel?


Isn't the Bevel Buddy, i think designed around blade touchups, producing a tiny back bevel? Morbark or Bandit endorses it, IIRC.
 
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