IH 3414 Hydro Help

Hello Folks,
I'm hoping someone out there has an IH 3414 with a hydrostatic transmission that can help me to understand what about my transmission is correct and what is not.

The tractor has a 4 speed (I believe) transmission. There are also 2 pedals on the left side, one for forward and one for reverse.

The linkage is very sloppy, so I will be working on fabricating/repairing the linkage parts.

Currently the tractor will not drive forward unless the reverse pedal is lifted up on. I think this is due to the slop in the linkage.

Question 1, what configuration does the tractor need to be in to shift gears in the transmission? Currently, the only way I can shift is if the tractor's engine is stopped. If I try to shift while running it grinds gears. Both pedals can be depressed simultaneously, so I assumed that was to disengage the transmission so it could be shifted, but doesn't seem to work.

Question 2, should the tractor stop and hold position when in gear, running and neither pedal depressed like the hydro on a lawnmower? Currently, as soon as the pedals are released the tractor freewheels.

If the tractor is on an incline and driving forward, as soon as the pedal is released, the backhoe will roll backward rather than holding position.

Question 3, does the hydro use the same hydraulic fluid from the tank in front of the fuel tank, or is it a separate system?

I currently have moisture in the system (milky fluid) that I plan on flushing over the next week.

I would love to pick the brain of somebody who has one of these tractors with the hydro transmission!

I haven't located the data plate yet (it might be gone) because it is not on the right bell housing as it should be. So I don't know serial number, and therefore year.

Thanks!

Erik

pull up on both pedals n try putting in gear,sounds like the pedal springs are
broke or missing. you should only be able to push 1 pedal only. interlock pin broke
or missing.
no it wont hold itself ,it frewheels

I used to have a 3414, loader and no backhoe. It wasn't hydro but reading the service manual I remember the pedals need adjustment to work properly.
Hitting one or the other will engage the drive then further pushing will increase the throttle. Pushing both together will increase the throttle
without the drive for working the hydraulics faster without moving. There's a procedure for adjusting. Leaving tomorrow so can't help you more just
now but I can dig up the manual when I get back next week. Email is open.

(quoted from post at 02:34:18 12/20/23) pull up on both pedals n try putting in gear,sounds like the pedal springs are
broke or missing. you should only be able to push 1 pedal only. interlock pin broke
or missing.
no it wont hold itself ,it frewheels

Click to expand...

Thanks for the info! I'm a little surprised that it will freewheel when the pedals aren't depressed. It must operate a bit different than a regular hydro then. Normally since there is no fluid being exchanged between the pump and motor, the motor is hydro locked preventing the wheels from spinning. I'll look into the interlock pin to see if I can figure out where it's supposed to be and how it's supposed to work. There is a ton of slop in the linkage, so it might be that is the whole problem.

Thanks!

Hi Mike, thanks for the info. Any advice you can give from your manual would be greatly appreciated!

If the manual you have documents the hydrostatic transmission well, can you send me a pic of the cover so I can see if I can find one?

Thanks!

I used to have a 3414 just like that. i bought all the shop manuals on ebay.I was always afraid I would get in a
hole and not be able to get out. It worked ok but seemed weak and was a pain to hold the pedal down to move. when I sold
it in 1987 I let all the manuals go with it. About a month later I ended up buying a 3414 with a standard transmission, I
borrowed the manuals back and copied them. Then let the manuals go when I sold that one.I don't remember the tractor free
wheeling, or grinding to shift when pedals were up. The IH shop manuals were not cheap but had a lot of info. on the
hydro. I would say money well spent, on a shop manual and parts manual.

Nice looking outfit. Is it a hydro or is it a shuttle? If it is a shuttle it could freewheel without your foot holding down a pedal as that is neutral. I have a White with a shuttle and it rolls when shuttle
is not engaged.

(quoted from post at 21:52:28 12/20/23) Nice looking outfit. Is it a hydro or is it a shuttle? If it is a shuttle it could freewheel without your foot holding down a pedal as that is neutral. I have a White with a shuttle and it rolls when shuttle is not engaged.

Click to expand...

IH calls it a "forward and reverse drive." Not a hydro.

(quoted from post at 04:37:41 12/21/23)

(quoted from post at 21:52:28 12/20/23) Nice looking outfit. Is it a hydro or is it a shuttle? If it is a shuttle it could freewheel without your foot holding down a pedal as that is neutral. I have a White with a shuttle and it rolls when shuttle is not engaged.

Click to expand...

IH calls it a "forward and reverse drive." Not a hydro.

Click to expand...

It has a pump and drive motor same as a hydro, no?

Just trying to understand what the correct operation is. I don't want to waste time troubleshooting a problem that doesn't exist

(quoted from post at 09:03:05 12/21/23)

(quoted from post at 04:37:41 12/21/23)

(quoted from post at 21:52:28 12/20/23) Nice looking outfit. Is it a hydro or is it a shuttle? If it is a shuttle it could freewheel without your foot holding down a pedal as that is neutral. I have a White with a shuttle and it rolls when shuttle is not engaged.

Click to expand...

IH calls it a "forward and reverse drive." Not a hydro.

Click to expand...

It has a pump and drive motor same as a hydro, no?

Just trying to understand what the correct operation is. I don't want to waste time troubleshooting a problem that doesn't exist

Click to expand...

Doubtful. This tractor is based off the British B-414 "Bradford built" utility tractor (starting in 1961), which predates IH's hydrostatic transmission by several years (introduced in 1967).

Your tractor appears to be a gear drive tractor with some sort of forward-reverse dual clutch system that allows quick changes of direction, handy for loader work. It may be hydraulic in nature, but it is not a hydrostatic transmission.

I think you're on the right track identifying and addressing the slop in the directional pedals and linkages. In the meantime you should get an owner's manual on order at the very least. Reprints are available for $40 or so each from reputable sources.

(quoted from post at 12:25:53 12/21/23)

(quoted from post at 09:03:05 12/21/23)

(quoted from post at 04:37:41 12/21/23)

(quoted from post at 21:52:28 12/20/23) Nice looking outfit. Is it a hydro or is it a shuttle? If it is a shuttle it could freewheel without your foot holding down a pedal as that is neutral. I have a White with a shuttle and it rolls when shuttle is not engaged.

Click to expand...

IH calls it a "forward and reverse drive." Not a hydro.

Click to expand...

It has a pump and drive motor same as a hydro, no?

Just trying to understand what the correct operation is. I don't want to waste time troubleshooting a problem that doesn't exist

Click to expand...

Doubtful. This tractor is based off the British B-414 "Bradford built" utility tractor (starting in 1961), which predates IH's hydrostatic transmission by several years (introduced in 1967).

Your tractor appears to be a gear drive tractor with some sort of forward-reverse dual clutch system that allows quick changes of direction, handy for loader work. It may be hydraulic in nature, but it is not a hydrostatic transmission.

I think you're on the right track identifying and addressing the slop in the directional pedals and linkages. In the meantime you should get an owner's manual on order at the very least. Reprints are available for $40 or so each from reputable sources.

Click to expand...

Funny thing is, I have a B414 too. Had it for the last 20 years or so. The B414 is a diesel which I prefer because AZ gas has ethanol in it and goes bad pretty quickly. The 3414 is gas. 2 completely different transmissions though.