Case 580E Backhoe Rear Lug Bolts

[Doug Weigle]

I have a Case 580E backhoe. I have 17.5l-24 tires on the rear. My driver’s side rear wheel lug bolts continue to work themselves loose to the point where the thread on all eight bolts has deteriorated and all need replacement. The existing lug bolts are fine thread and ~ 1 1/2 inches long. My issue is I do not know the thread size and diameter. Also…to assure a snug fit, I want to replace the original lug bolts with bolts that are an inch longer…i.e. total length being ~ 2 1/2 inches long. Once torqued in, I will lock a nut onto each bolt end, assuring a snug fit where the bolts can not work themselves out. Anyone know what the specifics are on those rear lug bolts? I thank you for all your help in advance. Doug in NJ

 

[Jim.ME]

I have a Case 580E backhoe. I have 17.5l-24 tires on the rear. My driver’s side rear wheel lug bolts continue to work themselves loose to the point where the thread on all eight bolts has deteriorated and all need replacement. The existing lug bolts are fine thread and ~ 1 1/2 inches long. My issue is I do not know the thread size and diameter. Also…to assure a snug fit, I want to replace the original lug bolts with bolts that are an inch longer…i.e. total length being ~ 2 1/2 inches long. Once torqued in, I will lock a nut onto each bolt end, assuring a snug fit where the bolts can not work themselves out. Anyone know what the specifics are on those rear lug bolts? I thank you for all your help in advance. Doug in NJ

It looks like the threads are the same, but they used two different sized hex heads. The clip below is from the 580E parts book. If the lug bolts won't stay tight the holes in your rims may be suspect as well.

 

[Doug Weigle]

Thank you Jim!