440 ic rebuild

[gaspumpsam]

Got my toy in shop, got engine out- think I need Tylenol !!
Crank needs ground, flywheel needs resurfacing, needs block decked and cyls needs boring, one new rod, then new pistons and rebuild head. Haven’t touched finals or steering clutches yet. Ouch!!
Has had a block repair by water pump mount. Believe someone forgot the one bolt and started prying. Governor has thrust surfaces have some wear spots where fingers have been sitting, believe will look for a better block( if I can find one) 2 cyl gas engine.

[PHPaul]

The engine in my 420C is good. Haven't checked compression but it starts and runs and doesn't smoke or make expensive noises.

Not sure if they're compatible, but I have to make a decision whether to throw money at the trans or part the machine out.

[gaspumpsam]

Yes that is a big decision . If mine(440 ic) wasn’t in as good shape (( metal wise) As it is, I, to, would be thinking of parting it out.

[Lavoy]

420 block is different.
In 30 years of doing this, I have never had a vertical 2 cylinder block that does not have taper in the cylinders, at least .030, so nothing says any other block you get is any better than yours. Rebuild yours, and then you know what you have as opposed to buying a used engine. I have long since lost count how many of these engine I have rebuilt, but it is not an issue. Pistons were out of stock a little bit ago, but are coming back. None of the rest of the pieces is a big deal. Complete rebuild kit, head to crank is around $800. Get the block bored, the crank turned, and the head rebuilt, and you will not believe how much nicer a machine they are to run.
If you decide not to reuse yours, I have a block here. I can have it cooked, magnafluxed, bored and planed prior to shipment if need be. Been working with the same machine shop for over 30 years, they are very familiar with Dubuque 2 cylinder engines. But, no reason you can't fine a local shop to do the same to yours.
Lavoy

[gaspumpsam]

Thanks for info, Lavoy! I am about to check crank pin specs to see approx how much they are going to have to grind, I am .005 under 2.500, so will have to see what specs are. Mains are under 2.500 but are reasonably good so believe .010 under on the mains. Will bore it .060 just give it more compression ( rather than .010 just to clean it up) so take about .030 off head and about .010 off block, and should have about 8:1 comp.

[Lavoy]

No .060 piston available, .045, .090, .125. Unless you have a late gas, doubt you can get 8 to 1, but maybe. Minimum required cut on the block, no extra room there, piston are already flush.
Lavoy

[gaspumpsam]

Update- found an older gentleman that has had engine machine shop for many years, he grew up with these little JD crawlers.He said he can make con rod just like new! Has a set of .040 over pistons(used, but good) my block looks like a .040 bore will be good. He is a super guy, major amount of expierence, and other than he is over 100 km away, very enjoyable afternoon, listening to his stories about these old girls! He doesn’t have a crank grinder so it will have to go to another machine shop.

Pulled winch off, loads of very fine metal sludge(Tylenol bottle getting close to empty) shifter ball worn bad, pulled top of trans(5 speed) found low gear flops around, can see a brass washer that’s very worn, suspect gear and shaft are worn, but won’t know for sure, till it’s apart. It almost looks like I have the higher serial number gear set. Is that possible ? I have a low serial
442172

Found steer levers sit about 3 inches from ea other, found someone had welded a gob onto case where lever stops rest, and didn’t do it very good. They also had brake adj bolts all way in so clutches weren’t able to disingage, backed them out and then levers would activate clutches( they will be rebuilt)
Ring and pinion are etched from moisture, but can’t see any reason why they won’t work well.
I have a actual JD 440 parts and service manual( very handy) .I also have a JD 2000 series service manual- this is no good to me and would be willing to trade it for something- if someone on here could use it.(only the 2000 series manual)

Lavoy, how do I post pics on this site?

[dtoots1]

log in on crawler site..go to bottom of page to question and answer forum...go to "new dedicated pic server" and read info therein.

[gaspumpsam]

Is that common on a 440 ic to have first gear (5 speed) wear out? If so, does the gear wear where bearings ride?
Does anyone have these parts?
Lavoy, is there a bearing kit for trans OH, or do we order separately ?

[Lavoy]

If the gear is worn, it is usually the teeth. I can put together all of the bearings.
Lavoy

[gaspumpsam]

Thanks. Adding this to parts order list! Should have trans apart this week, if I can get back at it. I am hoping that shaft is not worn, thinking that may be hard to find.