Jr pulls 830

1370rod · Jul 5, 2015

We where planning to enter the 830 in the 6500 and 7500# classes. For reasons beyond our control we were to late for those classes but could pull in the 8500 so he did. It ended up 3rd in a 5 tractor class which we were very happy with considering we were a 1000# light. Went in 3 low in COM and spun out with almost no noticeable converter slippage. Dynoed at 56 hp. Ran 15 lbs in the bais tires. Will try again, Any hints for improving are welcomed, we are newbies it this sport. Thanks guys, Rod.

jon f mn · Jul 5, 2015

You can see the tires buckling in the pic, add air so they don't sag and buckle. If they sag you loose lift on tge skid, when they buckle like that thd bars don't dig in as good. Do they have speed limits?

Ande · Jul 5, 2015

Bet your still proud Rod, looks good from here. Chip of the old block!

casecollectorsc · Jul 5, 2015

Use to pull my 800 gas com in 5500 and 6500.
Ran in the same gear and had the weights in the same place.
Bolted an Oliver clevis to the drawbar quadrant with spacers to raise it to max. legal height.
Only changes to the engine were it was a LP running on gas.
Second place was easy, but 720 JDs would give a guy fits.

Ron Sa · Jul 5, 2015

A fundamental is to transfer as much weight from the sled to the tractor as possible. This requires keeping the sled’s chain angle as steep as possible. Features that maximize the chain’s angle include--

1. Use a loop on the end of the drawbar large enough for the chain’s hook---Avoid using a pin and clevis.

2. Set the drawbar height at the max allowed

3. Position the end of the drawbar as far forward as the rules allow. This minimizes chain angle reduction caused by such things as tire squat, rearward pitch of the tractor, etc.

4. Construct a drawbar that does not bend down caused by the chain pulling down.

5. Shoot for the front tires becoming completely unloaded but not leaving the ground. The front end raising decreases the chain’s angle.

6. Minimize tire squat because tire squat reduces the chain’s angle. The first five features do not have a compromise. Tire squat has a compromise between maintaining a steep chain angle and maximizing the tire’s traction capability. Observe the amount of tire squat on the tractors that pull well and try to duplicate in future pulls.

1370pwr in ne · Jul 5, 2015

Rod,Nice looking 830.Did the front end come up any? If not move some weight to the back.The long bar short bar tires don't seem to grip as good as bias 23degree firestones half worn.Were there any other case tractors pulling in any of the other classes?What was the heaviest class they had?Darrell

Don Rudolph · Jul 6, 2015

Nice looking 830 Rod! A couple of suggestions: On a dirt track many times new tires don't bite as well as half-worn ones do. The 2nd suggestion is to watch and closely observe what other successful pullers are doing. And third, you learn something every time you hook up. Repetition is good. Don

Kow Farmer · Jul 6, 2015

Rod,
Congratulations to both of you. The ol girl looks great. I hope you guys had a good time. I enjoy these type of tractor pulls the most myself. Thanks for the great pic.
Kow Farmer Kurt

1370rod · Jul 7, 2015

Hi Darrell, ya I think we can move some weight back. Those tires are not the best thing for pulling the way it sounds but they will have to do. One other CASE a 1030 with a 504 in the heaviest 10500 class, he was a easy winner but only a 1256 pulled also. I have to replace a master cly on the 1070 as it will not hold pressure. Rod.

1370rod · Jul 7, 2015

No limits Jon, but we can not go faster any way. Thanks for advice, Rod.

1370rod · Jul 7, 2015

Thanks Ron.

1370rod · Jul 7, 2015

Thanks Don.

Jr pulls 830

1370rod

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jon f mn

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Ande

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casecollectorsc

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Ron Sa

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1370pwr in ne

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Don Rudolph

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Kow Farmer

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1370rod

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