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Allis Chalmers Discussion Forum

AC 7040 duals make popping sound

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Jack Boedigheimer

10-25-2012 21:13:49

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AC 7040 with on axle duals. The left side makes a popping noise on right turns. Have checked the bolts and all seem tight, the wheel is new as the center broke out of the old one. Any ideas what else I should check to find the problem ?

Thank you

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Deere Scotty

10-26-2012 03:09:59

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 Re: AC 7040 duals make popping sound in reply to Jack Boedigheimer, 10-25-2012 21:13:49  
Might try raising up the back end, & spinning both sides by hand. You will also be able to shake the wheels around (at least without calcium in them) a little bit. If nothing; then try taking the outer wheel off, & try everthing. Turning tight with / without brakes. Running on the side of a steep slope both directions. That would help determine an axle / bearing problem. Thats at least a start!

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10-26-2012 01:36:31

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 Re: AC 7040 duals make popping sound in reply to Jack Boedigheimer, 10-25-2012 21:13:49  
Not an axle bearing is it? sometimes sound travel through steel making it hard to figure out where the sound is coming from.


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10-25-2012 21:39:35

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 Re: AC 7040 duals make popping sound in reply to Jack Boedigheimer, 10-25-2012 21:13:49  
Don't know how your duals are made, but if the bolts grab the rim with wedges, check for slippage/wear on the wedge where it contacts the rim. Check for shiny spots showing that the wedges are sliding on the rim.

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