Chains Front Wheel Spacers - 2520 - non-JD suppliers?

[PCABE5]

Fresh off the lathe... not sure these will work since the center was milled out unlike the OEM product which has a raised center for the wheel. I'll give em' a try though. Made in America by Americans... and can't beat the price -> FREE.

<img src="http://www.tractorbynet.com/forums/attachment.php?attachmentid=299162"/>

I would say they will bolt on but won't work. Without the hub holding the weight it could be a matter of time before they break off or break your hub. Can they make you a new set?

 

[greg_g]

X2. I advised earlier to avoid the bolt-thru design. Once you install those, the entire weight of the front end will be supported by 4 lug bolts (per side). Plus the weight and force transferred by front implements (FEL, snow blower, scraper blade, etc) can only make things worse.

//greg//

 

[yelbike]

X2. I advised earlier to avoid the bolt-thru design. Once you install those, the entire weight of the front end will be supported by 4 lug bolts (per side). Plus the weight and force transferred by front implements (FEL, snow blower, scraper blade, etc) can only make things worse.

//greg//

Just to be devil's advocate. The tractor front weight may be 2000#, the loader another 300#, plus max another 1000# in the bucket. So 3300# plus some shock load, divided by 8 bolts. What's the shear strength of a grade 8 bolt?

My numbers are rough approximations, but someone should be able to figure it out.

Just for discussion.

 

[urbandeere2520]

I may install a steel sleeve inside the open center hub to reduce shear forces on the lug bolts and provide load transfer from the wheel hub directly to the axle. What's interesting is the OEM spacer design is a bolt-through design, though it has a solid center hub connecting the axle hub and wheel hub. I'd be interested to hear the shear strength of the grade 8 M14x50 lug bolts.

I found this: Shear strength is typically 60% of tensile strength, and the minimum tensile strength of a grade 8 bolt is 150,000 psi. We have an FAQ that addresses this question here: http://www.portlandbolt.com/technicalinformation/fastener_identification_markings.html

A M14 diameter bolt is near the equivalent to a 9/16" SAE bolt. A grade 8 9/16" bolt has a proof load of 21,850 lbs and a clamp load of 16,388 lbs. Using 60% of clamp load as in this application yields 9,833 lbs per bolt. Eight (8) times 9,833 lbs equals 78,664 lbs before the lug bolts and hubs will move, fatigue and fail. So assuming 3,300 lbs on the front axle, the bolts will provide a safety factor (excess capacity) of nearly 24x before failure. For you engineer types... please validate this assumption.

 

[PCABE5]

Wouldn't you only use times 4 sense there is only four bolts per wheel? Using 8 would be the whole axle as it would sit in a static load and 4 would be the weakest part while in use.

Only other thing I would say is that shear strength is a specific load applied in a fixture and your wheel will see all sorts of loads being applied to include shear as it carries a load around a field.

 

[urbandeere2520]

Wouldn't you only use times 4 sense there is only four bolts per wheel? ......

Yes, 8 bolts would be better than 4, no doubt. However, machining the 8 bolt wheel adapter is more complex and would have required more time and effort. The spacers were a freebie, so as the saying goes, "beggars can't be choosy." Also, the JD OEM version is a 4 bolt pass-through version, so you'd think JD would have moved to an 8 bolt design if their 4 bolt design was flawed. I'll let all know how the new spacers work. Please keep in mind, these custom made spacers are one of a kind to my knowledge, so your application will be different.

The lowest price I found to have the wheel spacers manufactured at a local machine shop was in the $500 - $600 range for the 4 bolt design. It's obviously less expensive to buy the spacers from JD and/or their distributors than have them made; unless you call in a favor as I did.

 

[yelbike]

Yes, 8 bolts would be better than 4, no doubt. However, machining the 8 bolt wheel adapter is more complex and would have required more time and effort. The spacers were a freebie, so as the saying goes, "beggars can't be choosy." Also, the JD OEM version is a 4 bolt pass-through version, so you'd think JD would have moved to an 8 bolt design if their 4 bolt design was flawed. I'll let all know how the new spacers work. Please keep in mind, these custom made spacers are one of a kind to my knowledge, so your application will be different.

The lowest price I found to have the wheel spacers manufactured at a local machine shop was in the $500 - $600 range for the 4 bolt design. It's obviously less expensive to buy the spacers from JD and/or their distributors than have them made; unless you call in a favor as I did.

I think the question about 4 or 8 was more related to whether you divide the total weight by one wheel's bolts or spread over both.

I don't think under normal conditions you'd ever be completly loaded one one side, but you bring a valid point forward. I think that would calculated into the safety margin. I think in this case there's lots of safety.

As a side note, I removed my Expedition el's wheels yesterday and found a spacer between the wheel hub and the rim. The spacer renders the center hub useless to hold the weight. Though this is NOT an OEM design, the suv weighs in at 5800# dry plus a 9800# towing capacity. I works. Should I be worried about the shear strength of the 6 studs the wheel is supported on?:confused3:

 

[urbandeere2520]

I need to pickup 8 M14 x 50mm bolts from the local hardware store. JD part number is LVU13274. Does anyone know the correct thread pitch for the JD bolts? Appears to be 2.0 or coarse pitch based on other JD board threads. Would appreciate if someone could confirm the pitch number. I'd hate to purchase third party bolts to find they don't fit! :-o The bolts I'm considering are Class 10.9 and are equal to or exceed Grade 8 bolt specifications (150,000 psi).

 

[jgayman]

I wish I could remember what I bought when I picked up mine. I recommend you take one of your current bolts along to be sure. Fine a nut at the HW store that fits it and then check the new bolts against that pitch. Crude but effective.

 

[PCABE5]

I need to pickup 8 M14 x 50mm bolts from the local hardware store. JD part number is LVU13274. Does anyone know the correct thread pitch for the JD bolts? Appears to be 2.0 or coarse pitch based on other JD board threads. Would appreciate if someone could confirm the pitch number. I'd hate to purchase third party bolts to find they don't fit! :-o The bolts I'm considering are Class 10.9 and are equal to or exceed Grade 8 bolt specifications (150,000 psi).

1.5 pitch. It should be a fine thread. This will make them hard to find sense M14's are not that common and 1.5's make them even less common. Fastenal wanted double what JD wanted for these bolts.