440icd reverser

Jaybird · Post by **Jaybird** » Tue Aug 25, 2015 7:29 pm

Just got started with my newly acquired 440. The reverser is stuck in the forward position. Can I fix without pulling motor? The clutch and regular gears work fine. Just got all my manuals. Looks like a winter project. Also am in need of oil pan for Detroit 2-53 and a few other parts.

pop pop · Post by **pop pop** » Wed Aug 26, 2015 4:48 am

maybe, probably not. start at inspection plugs,
welcome Jaybird, whats your location? tell us some machine history if you know it.
did you get it from a member?

Jaybird · Post by **Jaybird** » Wed Aug 26, 2015 4:58 am

Live in NC. Checked plug holes . could not see anything. Have you worked on these?

Stan Disbrow · Post by **Stan Disbrow** » Wed Aug 26, 2015 5:23 am

Hi,

Reverser is its own thing. Not related to the engine clutch or transmission. It has two clutch packs of its own inside. One for forward, one for reverse. In between the two is a set of spyder gears just like in a differential (auto, truck and wheel tractor rear end). These are at the very center.

With the lever in forward, the forward clutch locks the spyder gears from turning. So the output shaft spins the same direction as the input shaft.

With the lever in reverse, the reverse clutch lets the spyder gears spin. Think on a car jacked up. If you turn one rear wheel one way, the other wheel spins backwards. So now the output shaft spins backwards from the input shaft. All forward gears now become reverse gears.

There is an adjustment for the forward clutch on the left side of the reverser and the reverse clutch on the right side. Both via the bung holes. There is an adjustment procedure in the service manual. there is a specified amount of force at the end of the lever for each direction. 40 pounds IIRC on a 440. You push in spring loaded locking pins at each adjuster ring and turn the adjuster wheel until you have the correct tension.

The 440 is a little higher than the 420 as the 440 has a set of linkage for the lever. The 420 has one long lever to the left of the dash. You need to ensure your linkage is free and not messed up first, of course. Problems with the linkage will affect the amount of pull required.

It is possible someone adjusted the forward clutch on hard because the spyder gears are bad. As in locking the reverser up so you have to use the trans reverse. Any fault inside the reverser means yanking it out. And that means from the front back....

Stan

Jaybird · Post by **Jaybird** » Wed Aug 26, 2015 5:32 am

Thanks Stan . sounds like you are very familiar with reverser. If or when I tear into this thing can I get parts?

whiteclipse16 · Post by **whiteclipse16** » Wed Aug 26, 2015 5:51 am

From what I've heard, reverser parts are hard to come by in good/usable condition.
As for your oil pan, good luck finding that. Mine had some really bad holes and I couldn't locate a good used one. I ended up cutting the bottom out of mine and welding a complete new bottom in.
Be very careful if you do this. If you don't get the pan deep enough the oil pump pickup will hit the bottom of the pan and not be able to get oil. I noticed mine hitting and had to shorten up the piping for the oil pump. Works great now.

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JimAnderson · Post by **JimAnderson** » Wed Aug 26, 2015 4:20 pm

Jaybird,
You say you didn't see anything when you pulled the plugs on the
reverser.If I understand you correctly are you sure the case has not been gutted.Most reversers by this time were replaced with a through shaft.
If that is the case then there is nothing to fix.Luck,JimAnderson

Jaybird · Post by **Jaybird** » Wed Aug 26, 2015 7:31 pm

Jim, I guess I should of said I didn't see anything wrong. I did see what looked like the clutch mechanism in the hole closest to the back. I think I am going to take everything apart .I just wanted to get some advice from some who has worked on one before I dug into it.

Post by **Lavoy** » Thu Aug 27, 2015 7:28 am

I have at least some parts available, new and used. If you are going to keep the crawler, or maybe even if you aren't, reverser rebuild is a good idea. You will then know what you have, and won't have to worry about it.
Lavoy

Jaybird · Post by **Jaybird** » Thu Aug 27, 2015 1:03 pm

Lavoy, you are right. Started tearing down today. Already glad . found several other things needing addressed. I will let you know if I need parts.

Jaybird · Post by **Jaybird** » Sun Aug 30, 2015 1:59 pm

OK, got everything apart. Looks like I need clutch plates. Also need the rubber grommets that go around the radiator. Lavoy, do you have these parts? Should I replace anything else while I am in there? Maybe I should put new main clutch in before I reassemble.
Thanks, Jaybird

Post by **Lavoy** » Sun Aug 30, 2015 3:34 pm

Check all the bearings, including in the "differential" assembly. I had not been doing them, but now check them every time. Also replace seals and any thing else that looks suspicious.
Lavoy

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