H4 won't move

If you are lucky, it could be as simple as the pumps having lost their prime.  I think I'd make sure there isn't water in the bottom of the sumps before doing anything drastic.  I'm sure you will get better advice then mine in the next day or two.
And welcome to the forum!

The hydraulics are independent from the drive. tank on right side takes 30 weight oil and is driven by a hyd pump on the left front. you need to make sure it is in 1sr gear. push your lever forward on the left side by gas tank. (one that has a plate to hold it in neutral. you should hear your motor noise change. if you do then the its trying to move. if it doesn't the steering clutches could be froze from sitting that long. My feeling tells me you might not be in gear. one very important thing. there is plugs on each final drive housing. takes 1/2 in socket exender to to remove them. check them for proper oil levels first thing. sort of a weak point on that machine. I have an h4 , loader, gas myself. not a bad machine but does need to b taken care off.

Thanks everyone for the advice. I'm headed back to play with it some more now. I will post results later tonight.

The serial number is on the bar below the center of the grille facing up. Probably covered with dirt. Not a plate but stamped into the frame cross bar

I have a dipstick in the floor pan in front of the seat.pretty sure this is transmission.Its full. I have a dipstick under the seat. I'm not sure what this is, but it is full. I thought this was the hydraulic fluid. I found it was out of hydraulic fluid. I feel stupid but I told y'all I would let y'all know what I found.lol. The hydraulics work fine. The transmission however, doesn't. I pulled one of the plugs on the drive housing.It looks like grease in it.what should be in it and can this be the problem? I tried it in all three gears and it would never change the sound of the engine much less try to move.It acts like it is in neutral.

The drive housings I put 80/90 wt oil in them. it is a sling type oil lubrication. oil gets on the lower gear and rides up to the top. The dip stick you have to remove the seat to get to is for your transmission/rear end. the one you check on the right side is your torgue converter. there is a guage on your panel that registers torgue converter oil pressure if it works or not. you will have to take the deck plate your feet sit on to get to the line where it fits onto the housing. you could take that out and see if you get oil pressure when you try to start it. not sure if theres a filter in there or not. I had that happen to me once but my problem was I forgot to put it in gear. if you don't hear the engine change at all then it sounds like maybe your converter is either in neutral. not working. or not in gear. I'm not real familiar with the converter so some else on here will have to give you better advice. If your hyd reservoir for you loader was empty then you have some leaks to repair. my controls were leaking but I took it off an put new O-rings in it so it doesn't leak at all now.

Thanks so much for all the advice. I don't think I have checked the fluid with it running. I was told today that the dozer was almost new when this man bought it in 74.it has only been used on the same farm this whole time.the hour meter says 125.5 hours. They said it was working perfectly when they parked it a few years ago.Its been setting under a shed the whole time.It does have a few leaks here and there so maybe it's low of transmission fluid but I didn't check it with it running. I will try to go back Thursday to work on it again. I will keep y'all posted. I appreciate all the help.

It doesn't look brand new.lol. it's been painted, probably 20 years ago.it ain't pretty.

It wasn't 3quarts low. I over filled it. I just thought I'd clear that up before I made someone waste time their time asking.sorry

I wouldn't think so.it set with them engaged.If they were stuck, they should be stuck engaged.

No sir. I just cleaned and have ordered a new converter fluid filter.no change. The shuttle shift valve is getting warm with the machine only running for a few minutes. I don't know if that is valuable information, but I thought I'd put it out there just in case.

And I know some probably think I ain't putting it in gear, but I have tried all three gears with no change.The steering clutches and breaks seem to be working fine as we used them loading the dozer on the trailer.it wasn't running.We used a winch.

I knew the man.He passed away from old age.He just didn't have anything left to do with it at the farm.He probably would have found something else to use it on if he hadn't been so old.He had a guy who helped him around the farm that has a new kabota with a frontend loader and a scrape blade that took care of the roads and stuff for him.right before he passed, he was telling my daddy how good the dozer was and how much he loved it. The guy that has the kabota says it was working fine when they parked it, too.So I don't have any doubt that what they say is true. I have never known either of them to stretch the truth.

One other thought, does it have a diverted valve on left side, behind the seat which has a T handle. If so it may need to be pushed down. I know it redirects the hyd oil. But don't know if it has anything to do with movement of the tractor.

No change.... I'm so confused.lol