Oversized tires

RayK · 03-14-2008, 09:26 AM

I have an 04 CK20 TLB Hydro, it came new with oversized rear tires, they run very close to the fenders. My question is could these tires cause any problems with the transmission gearing etc. especially in 4 wheel drive. On my last oil change there was quite a bit of metal on the mag plug and part of a ring, looked like the ring was casting material but I'm not really sure about that. Tractor has about 350 hours of hard work on it, everything seems to be working normally in 2 wheel or 4 wheel drive no noises etc. My dealer has the metal and is trying to research where this metal ring could have come from. Any ideas would be appreciated. Thanks Ray

IslandTractor · 03-14-2008, 10:05 AM

I had the same 04 tractor. You did not mention -which way are your wheels mounted? Wide or narrow? What tire size? I think mine were the standard size and were mounted wide. There was a good amount of space both above and inside the tire. If your dealer cannot answer the question regarding impact on 4wd, I'd give a call to customer service at Kioti for starters. Maybe one of the experienced TBN active dealers will show up to comment too.

County Sawyer · 03-14-2008, 06:10 PM

If the tires are not the correct size when you use four wheel drive one axle will be trying cover more ground than the other and put real load on the drive line. Take your tractor out to the top of a grade on a paved road, put in 2 wheel drive and neutral on the gear shift. It should coast no problem. Then go back up and try it in 4 wheel drive. If it coasts the same then the tires are OK.

RayK · 03-15-2008, 09:40 AM

Thats a good idea I will try that, the tractor is going into the shop next week to be split and investigate the source of that mysterious metal ring. I hope they can find where it came from, the dealer does not think the tires are an issue. I will try the coasting thing out though for my own peace of mind. Thanks for the replies. Ray.

JerryG · 03-15-2008, 06:28 PM

The front tires should be 1-5% faster than the rear tires. If the number is greater, the drive train will wear at an accelerated rate and make it hard to take out of 4wd as well as increase the front tire wear. If the number is less than 1% the tractor won't steer as well as it should because the front will be getting pushed. Your dealer should be able to give you the front to rear ratio that is needed to calculate the tire sizes. Firestone Ag did have print about this online.
Even a couple of percent makes a lot of difference in the way the tractor reacts as well as the amount of wear.

03-14-2008, 09:26 AM	#1 (permalink)
RayK New Member Join Date: Feb 2005 Location: Ontario Canada Posts: 11	Oversized tires I have an 04 CK20 TLB Hydro, it came new with oversized rear tires, they run very close to the fenders. My question is could these tires cause any problems with the transmission gearing etc. especially in 4 wheel drive. On my last oil change there was quite a bit of metal on the mag plug and part of a ring, looked like the ring was casting material but I'm not really sure about that. Tractor has about 350 hours of hard work on it, everything seems to be working normally in 2 wheel or 4 wheel drive no noises etc. My dealer has the metal and is trying to research where this metal ring could have come from. Any ideas would be appreciated. Thanks Ray

03-14-2008, 10:05 AM	#2 (permalink)
IslandTractor Elite Member Join Date: Sep 2005 Location: Prudence Island, RI Posts: 3,919	Re: Oversized tires I had the same 04 tractor. You did not mention -which way are your wheels mounted? Wide or narrow? What tire size? I think mine were the standard size and were mounted wide. There was a good amount of space both above and inside the tire. If your dealer cannot answer the question regarding impact on 4wd, I'd give a call to customer service at Kioti for starters. Maybe one of the experienced TBN active dealers will show up to comment too.

03-14-2008, 06:10 PM	#3 (permalink)
County Sawyer Member Join Date: Sep 2006 Location: Bay of Quinte Area, Ontario Posts: 35	Re: Oversized tires If the tires are not the correct size when you use four wheel drive one axle will be trying cover more ground than the other and put real load on the drive line. Take your tractor out to the top of a grade on a paved road, put in 2 wheel drive and neutral on the gear shift. It should coast no problem. Then go back up and try it in 4 wheel drive. If it coasts the same then the tires are OK.

03-15-2008, 09:40 AM	#4 (permalink)
RayK New Member Join Date: Feb 2005 Location: Ontario Canada Posts: 11	Re: Oversized tires Thats a good idea I will try that, the tractor is going into the shop next week to be split and investigate the source of that mysterious metal ring. I hope they can find where it came from, the dealer does not think the tires are an issue. I will try the coasting thing out though for my own peace of mind. Thanks for the replies. Ray.

03-15-2008, 06:28 PM	#5 (permalink)
JerryG Super Member Join Date: Apr 2000 Location: Northwest Arkansas Posts: 6,904	Re: Oversized tires The front tires should be 1-5% faster than the rear tires. If the number is greater, the drive train will wear at an accelerated rate and make it hard to take out of 4wd as well as increase the front tire wear. If the number is less than 1% the tractor won't steer as well as it should because the front will be getting pushed. Your dealer should be able to give you the front to rear ratio that is needed to calculate the tire sizes. Firestone Ag did have print about this online. Even a couple of percent makes a lot of difference in the way the tractor reacts as well as the amount of wear. __________________ My Photos My OTHER Photos

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