Ford 3910 Front Bumper

dbaer78 · Dec 20, 2014

That 3910 is a beauty. Not many that nice in my area...

sixdogs · Dec 20, 2014

Happy Gilmore said:
I'm going to be in the market for a pair of 16.9-30 rears for the 4630. I'm thinking Titan Hi Traction Lugs. I want to stay US made

Take a look at Firestones. Not much more money.

DT86 · Dec 20, 2014

sixdogs said:
Take a look at Firestones. Not much more money.

Are they supposed to be better than the Titans?

Happy Gilmore · Dec 21, 2014

I know the rear tires are in worse shape than the fronts as far as wear, but had you thought of maybe just getting new rear tires (same size) and keeping the power adjust cast rims. The price on getting new front rims/tires would be a lighter hit to the wallet than rear rims/tires. You'd have a new set of sneakers all the way around and a sweet package.

Happy Gilmore · Dec 21, 2014

sixdogs said:
Take a look at Firestones. Not much more money.

My tractors all have either Goodyear or Titans, just the way they came, figured I'd keep em in the family, not that it matters much.

Ovrszd, my 3930 2wd has 13.6-28 rears as it came. Strangely it has implement tires on the front as opposed to 3 rib. I predominantly use it for teddering and raking, so not a big deal for me.

For the heck of it I made up a chart of my tractors with sizes they came with.

ovrszd · Dec 21, 2014

I've had two tractors with Titan tires. I get along fine with them. I can't testify to longevity yet.

ovrszd · Dec 21, 2014

Happy Gilmore said:
I know the rear tires are in worse shape than the fronts as far as wear, but had you thought of maybe just getting new rear tires (same size) and keeping the power adjust cast rims. The price on getting new front rims/tires would be a lighter hit to the wallet than rear rims/tires. You'd have a new set of sneakers all the way around and a sweet package.

I think I'm so over geared now that I can't use front tires/wheels big enough to get my gear ratio right. I'll run some numbers in that chart I found to check that. Good thought. I'll get back to ya.

RickB · Dec 21, 2014

Before I spent 5 cents on anything, I'd jack up all 4 wheels of that 3910, engage the 4wd and rear difflock. Mark one front and one rear sidewall and manually turn a rear wheel through one full revolution (transmission in neutral). See where the mark on the front tire ends up. A real world test. All the calculations in the world are meaningless if the tractor has different gears installed than what is used for the calculations.

Just because the tire combos are unfamiliar to us doesn't mean they are improper. Somebody put them on for some reason.............

ovrszd · Dec 21, 2014

RickB said:
Before I spent 5 cents on anything, I'd jack up all 4 wheels of that 3910, engage the 4wd and rear difflock. Mark one front and one rear sidewall and manually turn a rear wheel through one full revolution (transmission in neutral). See where the mark on the front tire ends up. A real world test. All the calculations in the world are meaningless if the tractor has different gears installed than what is used for the calculations.

Just because the tire combos are unfamiliar to us doesn't mean they are improper. Somebody put them on for some reason.............

I'll run that test tomorrow. So explain to me what my expectations should be Rick. I value your opinion on this.

I don't think this tractor has had the gears changed. I base that on the fact that you can't buy variables. Only one ratio offered.

I think this tractor has had the rear wheel/tires changed from some other model. I think it's got 2wd rear wheels on a 4wd tractor. CNH's website offers 38" rear wheels. But they don't clarify if 2wd or 4wd.

I think this was done when the original owner traded it. He swapped tires/wheels to get rid of junk tires and keep newer tires that had been installed on the 3910. No consideration of size was taken. I think he might have put 4 new tires on the tractor, then later traded it and didn't want to lose the newer tires?? :confused3:

Green Power · Dec 21, 2014

Good lookin guard.

ovrszd · Dec 21, 2014

Green Power said:
Good lookin guard.

Thank you. Sorry this discussion has wandered.

I'll bet you have some homemade stories to tell.....

RickB · Dec 21, 2014

ovrszd said:
I'll run that test tomorrow. So explain to me what my expectations should be Rick. I value your opinion on this.

I don't think this tractor has had the gears changed. I base that on the fact that you can't buy variables. Only one ratio offered.

I think this tractor has had the rear wheel/tires changed from some other model. I think it's got 2wd rear wheels on a 4wd tractor. CNH's website offers 38" rear wheels. But they don't clarify if 2wd or 4wd.

I think this was done when the original owner traded it. He swapped tires/wheels to get rid of junk tires and keep newer tires that had been installed on the 3910. No consideration of size was taken. I think he might have put 4 new tires on the tractor, then later traded it and didn't want to lose the newer tires?? :confused3:

One revolution of the rear axle should yield 1 to 1.05 revolutions of the front. The front differential SHOULD be a limited slip type. You should not be able to turn one front tire (4WD disengaged) independently of the other.

ovrszd · Dec 22, 2014

RickB said:
One revolution of the rear axle should yield 1 to 1.05 revolutions of the front. The front differential SHOULD be a limited slip type. You should not be able to turn one front tire (4WD disengaged) independently of the other.

It's definitely a limit slip. I'll test the revolutions later today.

rgmosley · Jan 24, 2015

I have a FWD Ford 3910 that had a full protection system built. I have removed it all and would be happy to sell it to someone that could use it. The front bumper can be mounted by itself and is great to protect the tractor. The tractor was used by the Sun Oil Pipeline group to brush hog right-of-ways and the cage was for brush protection.

ovrszd · Jan 24, 2015

rgmosley said:
I have a FWD Ford 3910 that had a full protection system built. I have removed it all and would be happy to sell it to someone that could use it. The front bumper can be mounted by itself and is great to protect the tractor. The tractor was used by the Sun Oil Pipeline group to brush hog right-of-ways and the cage was for brush protection.

View attachment 408418 View attachment 408419 View attachment 408420

Robert, you are the man I've been looking for!!!! I saw your pics in reviews but couldn't figure out how to get ahold of you.

I need a favor. Big favor. I need to know what size rear tires/wheels you are running??? I'm assuming 14.9x28?? I appreciate any response you can give me. My tractor has had the rears swapped out to 38". It pushes the front more than it should with that tall of tire combination.

Thanks for posting on here, I love your tractor cage!!!

Oh, and welcome to TBN.

rgmosley · Jan 24, 2015

Richard, The tires on the back are 14.9x28 and the front tires are 9.5x24. You can see the size on the tire if you zoom into the attached picture:

There is also data on the standard tires that were available on the 3910's when they were new, you can look it up at TractorData.com Ford 3910 tractor information

Here are the tires listed on the site, my sizes are highlighted in red:

Ford 3910 Tires:
Ag front:
7.50-15 (2WD)
8.3-24 (4WD)
Ag rear:
13.6-28

Ag front:
5.50-16 (2WD)
6.00-16 (2WD)
6.50-16 (2WD)
7.50-16 (2WD)
9.5-24 (4WD)
Ag rear:
14.9-24
16.9-24
14.9-28

My cell phone is 856-470-4696. Thanks, Bob Mosley

ovrszd · Jan 24, 2015

Thank you very much for the info. I had looked at the tractordata.com stuff and was pretty sure I needed 14.9x28". That's what I'll look for.

If you were closer I'd help ya sell your cage. Looks strong enough for sure!!!!

I'd like to see you post a thread about your transmission rebuild?? Would be interested to hear that story!!

ovrszd · Jan 24, 2015

Oh, sorry, one more thing, are the centers of your rear wheels the same size as the axle end or are they a loose fit?? The axle ends on these tractors are 5.5". I can find wheels everywhere with 6" center hole (pilot hole) but can't find any with 5.5".

Thanks again for your help Bob. I really appreciate it.

rgmosley · Jan 28, 2015

Richard, I posted this in another thread but i posted it here to complete this thread. My center holes on the rear rims are 5.5" diameter.

Thanks, Bob

ovrszd · Jan 29, 2015

Thanks Bob. Thanks for calling the other day too. We had a great visit. He** I didn't even know they had tractors in New Jersey!!! I thought the only thing they did there was make that "other" brand of Picante Sauce (remember that commercial).

Thanks again Bob. I'll be calling you this Spring about my tractor's transmission.