Tires HN TC33DA Correct Tire Size??

[dqdave1]

I did email Titan and ask them for a tire that would be suitable for your situation (and mine). I stressed that New Hollands with the 24 x 8.50 x 14 turfs are common with a FEL and there is a safety issue involved and what tire would be interchangable with current tire that is within range. I asked if making a 6 ply 24 x 8.50 x 14 turf is out of the question. To date I have no response.
Dave

 

[drm]

dqdave1,

I spoke to NH customer support and got nowhere. They said to ask the Dealer again. Spoke with the local Ag tire service center and they have nothing. Spoke with Titan and the rep’s info was not as up to date as the internet (per them when I questioned some of their numbers which were different from the web.) They have nothing and no interest in possibilities. They were recently acquired by Carlyle tire. I do not know if this is good or bad.

I gave the same safety speech to everyone and no one cares. I went to the point of telling the dealer (and NH Rep) that this could be a safety issue and a liability to NH based on what I have observed and my engineering experience. The dealer will look into it again tomorrow. NH said ask the dealer.

Based on the prelim information I have, both of the Titan Trac Loader tires are out of the allowable ranges for percent lead. The 25x8.50-14 is too large allowing only 0.44 percent lead (1-2 percent is minimum) and the 24x8.50-14 is too small allowing 5.75 percent lead (4-5 percent is maximum). Of course this is based on an assumed Rear/Front drive ratio.

I compiled an Excel spreadsheet to compare various combinations and the OEM tires and all three OEM tires are in acceptable limits based on my assumptions.

I'll keep you up to date.

...Derek

 

[Boomerang1]

Case ih Repair manual for DX33 states the ratio should be 1.59 with an acceptable range of 1.56 - 1.62

 

[dqdave1]

I have sent many emails to CNH. They never answer anything you ask and if by chance they do answer, you get the same response " ask your local dealer". New Holland, I believe, does not have a customer Rep that can answer anything. Last week I asked them when they would post the info about the new TC 31 and 34. No response.

Can a 12" rim fit on a TC -33 ? Titan has a tire size; turf 26 x 12 x 12 in 4 ply (1780 lb) and in 6 ply (2250 lb) with a 73 " rc.
Rim may not have the needed clearance.

 

[drm]

Boomerang1,

Thanks for the quick reply.

Based on these numbers and the Rolling Circumference published on Titan's web site (which do not match the catalog my tire dealer or the Titan customer rep have!), following are the ratios:

OEM Ag: 1.566 OK
OEM Industrial: 1.560 (Barely) OK
OEM Turf: 1.569 OK (best of OEM but much lower than the recommended ratio of 1.59.

Titan 24x8.50-14 R3 (4 ply) front & Titan OEM 13.6x16 R3 rear: 1.591. The closest to the recommended value.

I’ll be interested in finding out what NH has to say. I am going to go over the RC numbers with Titan again tommorow and compare thier catalog numbers.

…Derek

 

[drm]

Dqdave1,

I wonder how much support the dealers get.

I have not looked but I doubt that the 12” rim will fit. Does not matter much because the 73” Rolling Circumference with the OEM rear Rolling Circumference of 113” yields a ratio of 1.548 which is below the allowable of 1.56”.

We would need a front tire with a RC of 70 to 72” with the OEM rear.

…Derek

 

[LRH]

Glad to see some activity here. Have been to the NTEA work truck and equip show in Atlanta today (03-02) and just have had time to check in. Take note that the rolling radius of the tire will change with load , so if I had to error one way or the other, I would error on the tall side on the front as long as not extremely too tall. The front tires should lead, with some slippage at all times, and it would be better to have it slip a little more while under light load and then be closer to the ideal size when burdened with a bucketfull of material putting less stress on driveline. It is especially bad to have the rear tires trying to push the fronts. Most ring & pinion gears are set up stronger in a pulling mode. Some people have damaged front axles trying to pull other vehicles out of mud/ditches in reverse. The front axle see this kind of load when being pushed along by the rear tires.

 

[drm]

LRH,

You are correct about the change in slippage with load. The only problem is that the larger tire (25x8.50-14) combined with the OEM rear Turf (13.6x16) yields a ratio of 1.507 which is much lower than the recommended ratio range and most likely will be in a lag state (I guesstimate -2.5%) which would not be acceptable.

...Derek

 

[LRH]

</font><font color="blue" class="small">( LRH,

You are correct about the change in slippage with load. The only problem is that the larger tire (25x8.50-14) combined with the OEM rear Turf (13.6x16) yields a ratio of 1.507 which is much lower than the recommended ratio range and most likely will be in a lag state (I guesstimate -2.5%) which would not be acceptable.

...Derek )</font>

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You have the math correct but the figures backward, the larger the front RC, the more ground it will cover. The front tire will have to only turn 1.507 times to cover the same ground as the rear one, versus the smaller having to turn approx 1.56 or so. If You put the same size front and rear tires you would have a figure of 1.0 and if the front RC was half the rear you would have a RC of 2.

 

[drm]

LRH,

You are obviously correct. I did not take time to think about the answer to see if it was logical /forums/images/graemlins/blush.gif. Not very good engineering /forums/images/graemlins/crazy.gif. I set up the subtraction in the formula backwards. With the larger Industrial the slippage would be over 5% probably closer to 8 or 9%.

Thanks for clearing that up.

...Derek