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Ronald Wohlschlaeger
New member
Username: Ronster
Post Number: 1
Registered: 01-2006
Posted From: 24.151.59.155
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, January 31, 2006 - 05:23 pm: | 
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I've got an anoying thumping comming from the right side of my Bigfoot. It's mostly noticeable on hard pavement. I've lifted all 6 wheels off the ground and ran the Argo but can't seem to find a bent axel/wheel assembly. As far as I can remember, I haven't hit anything. The only possible cause I can think of is when a large web belt with a steel buckle slipped through the floor board, got caught in and broke the middle chain on the right side. I did notice when I ran the Bigfoot with all 6 wheels off the ground, the machine rocked side to side in proportion to the amount of throttle I was giving it. Anyone got any ideas on this one? |
Jerry R. Nuss, Max Dealer in Illinois
Senior Member
Username: Jerrynuss
Post Number: 255
Registered: 02-2005
Posted From: 71.244.167.108
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, February 01, 2006 - 01:37 am: |
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Check your idler shaft bearing and if the idler shafts have any up and down play. I ran across this on one that had a broken idler shaft bearing flange. Also check you idle chains and see if the master link is in correctly. I ran into one that the masterlink was hitting the brake disc at different spots and made a rythmic thump. |
Ronald Wohlschlaeger
New member
Username: Ronster
Post Number: 2
Registered: 01-2006
Posted From: 24.151.59.155
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, February 01, 2006 - 07:38 am: |
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Jerry,is my idler shaft the one that the disc brake is mounted on and drives the idle chain? I'll check it this morning and let you know. Thanks. |
Jerry R. Nuss, Max Dealer in Illinois
Senior Member
Username: Jerrynuss
Post Number: 257
Registered: 02-2005
Posted From: 71.244.167.108
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, February 01, 2006 - 11:25 am: |
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Not the one your disc brakes are mounted on. The brake discs should be mounted directly to the transmission then the chains run down from the sproket on the disc brake to the idler shafts. Check the idler shafts and the chain tension. Rotate the shafts and check to see if the shaft moves inside the bearing or if the flange to the outside ends of the shaft are loose or broken. Another thing is to check the transmission and make sure it is securely mounted and not loose. Are all you lug nuts tight and do you have the same amount of air in the tires. How long had the machine been parked before you drove it on the hard surface. Sometimes the tires will deform a little and it will cause that bouncing and thumping. Of course they should not be driven on a hard surface but sometimes that is what has to be done. You had mentioned the chain damage did the sproket get any damage or get knocked out of alignment. A lazer pointer works well to see they are all in line. I've attached a pic of an idler shaft. It is in the same location on the bigfoot but the bigfoot has a heavier outer flange and moveable sprokets. This shaft has the sprokets welded to them.  |
david berger
Senior Member
Username: Davidrrrd
Post Number: 264
Registered: 01-2005
Posted From: 172.148.148.243
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, February 01, 2006 - 06:10 pm: |
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in adition to the above you can also get alot of shakeing from water in one or more tires!
but if as you say something got stuck in drive train then you might have bent something, or overloaded a bearing maybe, you might have blown a bearing, or bent sproket,ect..ect.. |
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