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Case Tractors Discussion Forum

VAC 32 inch for 28 inch rims

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Tire Doctor

05-10-2006 05:17:51

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I bought a VAC last winter and am fixing it to use on tractor drives. One problem is one of the rear rims is rusted out, the other is usable. They are the 32" rims. In order to get the speed I need for the drive I need taller tires which aren"t availble in 32". I have someone who wants to trade my 32s for some 28 VAC. Seens like a good deal to me but my question is are the 32s a lot more valuable than the 28s?

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05-10-2006 10:44:00

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 Re: VAC 32 inch for 28 inch rims in reply to Tire Doctor, 05-10-2006 05:17:51  
I have 14.9 X 28's on mine, and that helped a little. As long as you are going to the trouble... Why not split your rims and add a little width? 24.5 X 32's off some old combine would look kinda cute. DK

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05-10-2006 08:24:37

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 Re: VAC 32 inch for 28 inch rims in reply to Tire Doctor, 05-10-2006 05:17:51  
Turn up the governor a bit. If you can run 11 1/2 mph now at the standard 1,425 engine rpm then you will be doing 12.9mph at 1,600 and 14.5 at 1800. Also, gear swaps (not ring and pinion) in the transaxle will change your road speed. There are 3 different ratios of drive/driven side gears. These were fitted at the factory according to rear tire size specified. A VA Series Parts Manual shows these sets.

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05-10-2006 11:57:56

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 Re: VAC 32 inch for 28 inch rims in reply to mj, 05-10-2006 08:24:37  
I was told that when VACs were new Case sales reps. would go from dealer to dealer with a VAC and a trailer. To speed things up they swapped the governor spring with brake return spring. 20 years ago the Case dealer I worked at traded in a VAC. While salesman was talking to farmer, the owner did this swap and drove tractor back to the shop. The farmer could't believe his eyes what he saw. They said one thing that happened with the higher motor speed was that the dipstick would break off from vibration?

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05-10-2006 06:23:14

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 Re: VAC 32 inch for 28 inch rims in reply to Tire Doctor, 05-10-2006 05:17:51  
third party image

32 was standard 28 were an option for the VC..also fixing one up.. speed..I do a 40 mile Fun Run and we run about 10 miles to 11 miles ph..there are several Vac in group..I run and RC Case and the leader..come on down and ride with us....

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Jerry W

05-10-2006 06:02:42

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 Re: VAC 32 inch for 28 inch rims in reply to Tire Doctor, 05-10-2006 05:17:51  
I do not know about more valuable but the 32" are definitely harder to find by far.


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05-10-2006 05:41:15

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 Re: VAC 32 inch for 28 inch rims in reply to Tire Doctor, 05-10-2006 05:17:51  
I don't know about the value, but I have 28's on my VAC and I don't see how you will get enough speed with that size rim. I don't even reach 10mph, 12 around here is bare minimum. It is an excuse to buy another tractor.

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05-10-2006 08:29:48

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 Re: VAC 32 inch for 28 inch rims in reply to MikefromIowa, 05-10-2006 05:41:15  
13.6 x 28s will gear her up

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