Allis 620 hydro

[720nut 4,225]

been setting for couple of months. I put a different hydro unit in a few months ago and worked fine but, anytime it sets for a while it will not move till it gets warm. Today acted like it was low on oil but checked and it seemed ok, after about three minutes it backed up and acted ok till I went to drive it around and it didn't want to move or moved just a little. I have more tied up in it than I can get out of it or I'ld sell I'm to the point where I'm just about ready to sell all and buy a good used Kubota.I know it's been discussed in several threads but I'm unable to find, computer dunb I guess

[lugnard 73]

Is there a filter or screen in the fluid drive that may be a bit plugged? Sounds like a low flow issue. But guessing of course!

Harry

[ShaunE 1,271]

Lloyd.

I'd change the filter (if you haven't), put it on jack stands & let her go for a while just to see if you have some air that keeps giving you problems.

But be careful!

[720nut 4,225]

Shaun I had a wix on it first when it first acted up and replaced it with a Baldwin and it seemed fine till I left it set for a while.

[midnightpumpkin 83]

Lloyd,

That machine just looks too nice, nice job on the restoration.

My thoughts are along the same lines as the previous two posters.

Specifically, I would take a careful look at the lines going to and from the filter. The filter is on the suction side of the system, if one of those lines had a crimp it could be your cause.

Is it acting similar to when the original hydro unit was in it?

John U

[720nut 4,225]

John no it's not, the other one wouldn't do anything pinion was seized I freed it when I pulled it out still laying on the bench. This thing worked beautiful when I put it in. I don't have much hair left to pull out:D I think I'll try jacking it up and let it run and see what happens. I replaced all the lines possible one may be collapsed, I hadn't thought of that till now. Will check it tomorrow and let ya know

[Ronald Hribar 105]

Could your clutch be slipping?

[720nut 4,225]

I'm not sure, Did put new belts on. I sure check and see that's why I'm asking because I don't think so go anymore (old age catching up)

Need to pull a couple more covers drive shaft not moving, didn't think I would have to readjust belts this quick. Will pull bottom cover and check to see if that is problem or?

[StanD 0]

Check bottom bearings on the clutch also. Pivit point bushings & pivit shaft also wear out so belts are not aligned basically driving on one belt. Belts will go out of adjustment in short order.

[ShaunE 1,271]

Had one of those pivot point bearings go out over the summer. Stalled the engine out while using the brush hog. Thought I dropped a magnet out into the stator & really messed things up. Lots of hours later, I figured it out & was pleasantly surprised.

[isetta 50]

I noticed a big difference in the tractor speed when it's really cold. The first few minutes it is slower than normal. Doesn't sound like that is your issue but something to watch for when evaluating fixes you make. Sounds like Pumpkin is onto something, possibly an internally collapsed hose.

[720nut 4,225]

Well it's happy It's back in garage, I swear it never wants to leave. Clutch pedal is tight and shaft barely turns so I'm assuming the belts need adjusted again, I know book says to adjust after running for a while but didn't think it would be this quick. Hoping to get cover on side of to get at adjustment without tearing all apart. will take bottom cover off tomorrow and see what's going on, got my fingers crossed.

I've been consumed with the B207 that I've not looked at this in several months, just thought I'ld get it out and play but it had other ideas.

[720nut 4,225]

I believe John may have figured it out. I had forgot about the bad hydro and when I was trying to get it to work stretched the belts and now there slipping. I took a couple covers off and so far seems to be what is happening.

dOd8DdOd I want to thank everyone for your help,reaffirms that this is the best site around for help and knowledge of these tractors.