Power Steering Pump 2

Caryc

Well-known Member
After I installed the new pump on my MF202 I discovered that it was leaking at the hole where the bottom fitting when into it.

When I screwed the fitting (the one I took off the old pump) into it, I was a little worried that it didn't go in very far. So anyway it leaked.

I pulled the pump back off and discovered that the fitting was a little crooked in there. I went to town and got a new quarter inch-18 thread fitting from Napa. I came home and tried the new fitting in the hole. It didn't go in very far so I pulled it out and the first couple threads on the fitting were buggered up.

OK, so back to Napa, I picked up another new fitting and a 1/4"-18 pipe tap. I got home and tried the tap in the hole in the pump. it started a little but wouldn't go any more. It looked straight at all angles so I started to gently work it in like a quarter turn at a time. I thought that would just clean up the first few threads and it would go in nicely the rest of the way.

That wasn't the case. That tap was cutting on every turn. It turned kind of hard like I was tapping a new hole. So now I'm getting worried about screwing up the pump body and having to get another new pump. I measured how far the tap was going in so when I figured it had gone in at least a half inch I pullet out. I screwed the new fitting in the hole. It went in and got very tight. I was almost afraid of breaking it off in the hole but finally got the fitting turned facing the way it should be.

So now I had to put the pump back in. I had a hell of a time the first time, kind of like putting a starter in an 8N. But when I pulled the new pump off, I pulled the reservoir toward me at about a 45 degree angle so it was clear of the distributor and wiggled it back and forth slightly and it came out pretty easy. So I tried putting the pump back in the same way, with the reservoir at about a 45 degree angle towards me. I wiggled it back and forth to get that tight gear to slip into the cam gear and was very surprised when it went it without all the trouble I had the first time. Heck, there must be like .030" only clearance between the pump and the distributor. Removing the reservoir cover probably would have made it a little easier but I didn't want to take a chance of knocking some crud into the reservoir.

Anyway I got the pump in again and I just took the tractor for a spin around the yard and no leaks. Of course the pump works very well.

When I put the fitting into the top hole in the pump, it went in kind of hard also. But no leaks like the bottom one did.

It made me wonder what those holes are tapped for. It seemed like that 1/4"-18 tap should have gone into that bottom hole a lot easier than it did. As I said, it felt like it was cutting new threads all the way. Below is a pic of the standard brass fitting that the hose connects to.

Anybody know if those holes are tapped for something other that a standard 1/4"-18 pipe fitting?

DSC03779_zpsrgwkcdrk.jpg
 
Honestly that fitting looks like it was cross threaded with the way it mashed the threads. Can't remember... did you put a new pump in there or rebuild the old one? If it was a new pump i wonder if it was threaded for metric instead..
 
(quoted from post at 17:19:25 03/06/17) Honestly that fitting looks like it was cross threaded with the way it mashed the threads. Can't remember... did you put a new pump in there or rebuild the old one? If it was a new pump i wonder if it was threaded for metric instead..

That was a new fitting that I tried to put into the new pump. The box with the new pump has this logo

AHS
original Anadolu Hydraulic
Made in Turkiye

Sold to me by Sparex Ltd Devon England

So evidently the holes in the pump were for metric fittings? How the heck was I supposed to know that? I first used the old fittings that came out of the old pump.

Do they even make fittings like that that go from metric threads to SAE threads?
 
Ya that is it. A buddy of mine recently got a new pto pump for his tractor. After scratching our heads why things just didn't want to thread right he contacted a hydraulic shop that told him his pump had the british pipe thread. He was able to get adapters to make everything fit together properly and has had no issues with it. They had the adaptors in stock and only cost a few bucks.
The guy at the shop claimed that china has moved to using the british threads on everything they make, pumps and hoses etc, and import to the states now for whatever reason. Since yours was made in turkey i would bet its metric.
 
(quoted from post at 07:01:13 03/07/17) Ya that is it. A buddy of mine recently got a new pto pump for his tractor. After scratching our heads why things just didn't want to thread right he contacted a hydraulic shop that told him his pump had the british pipe thread. He was able to get adapters to make everything fit together properly and has had no issues with it. They had the adaptors in stock and only cost a few bucks.
The guy at the shop claimed that china has moved to using the british threads on everything they make, pumps and hoses etc, and import to the states now for whatever reason. Since yours was made in turkey i would bet its metric.

Then I guess I got pretty lucky running that SAE tap into it and having no leaks. I sure wouldn't want to try it again though.
 
You will run into this more and more even on "Made in USA" machines. I started running into this about 10 years ago. You can find ways to adapt from type to type, but often times it will not be just 1 fitting. Most decent hose shops carry or can get whatever fitting or hose end you need. The more fittings you add the more likely it will leak. I have just gotten into the habit of carrying both SAE and Metric thread gages when I work. PT glad u posted the Parker link. It is a good one.
 
(quoted from post at 09:59:03 03/07/17) You will run into this more and more even on "Made in USA" machines. I started running into this about 10 years ago. You can find ways to adapt from type to type, but often times it will not be just 1 fitting. Most decent hose shops carry or can get whatever fitting or hose end you need. The more fittings you add the more likely it will leak. I have just gotten into the habit of carrying both SAE and Metric thread gages when I work. PT glad u posted the Parker link. It is a good one.

I had a thread pitch gauge but it's just too hard to see "into" a small hole like that to see how the threads match up.

Trouble is that there are no hose shops or hydraulic shops or starter rebuild shops or the like in the rather small town of Hemet.

The closest large town is Riverside, about a 45 minute to one hour drive. It just didn't dawn on me that the threads would be British or metric. I pulled those old fittings off the old pump and thought they should fit in the new pump.

I guess I should stop thinking of my MF202 like my American made Ford 8N. :roll: :roll:

It seems that everything on this 202 is a PIA. I would like to put a new tractor meter (tach / speedometer) in it but all the gauges are enclosed completely and not easy to get to like the 8N. I don't know how much I'd have to take apart just to get at them.

Aside from all that, I really like the tractor.
 
The problem is that its a aftermarket pump, the aftermarket parts aren't made exactly the same as the original (as you found out). That's the bad thing about new parts for a old tractor. You can go to tractor house, and do a parts search with the part number. Sometimes you may find a dealer that has a original part collecting dust of a shelf.
 
(quoted from post at 11:29:51 03/07/17) The problem is that its a aftermarket pump, the aftermarket parts aren't made exactly the same as the original (as you found out). That's the bad thing about new parts for a old tractor. You can go to tractor house, and do a parts search with the part number. Sometimes you may find a dealer that has a original part collecting dust of a shelf.

Yep, point taken. But if someone would have told me "it's a metric thread, just run an SAE tap into it and it will seal", I don't think I would have tried it. I really can't even tell you why I did it but thank God it worked.

Do you think this MF202 would have been made here in the US? Wouldn't it still have British parts on it?
 
When the same model tractor is also available in the UK, or other countries they did have a different parts book for them. I don't think the 202 was that way. Since Massey Ferguson doesn't make new parts, the companies that sell parts source the parts from wherever they can get them from. From the way it sounds, it sounds like you maybe ok since the other threads are probably a little smaller than the SAE sizes. As you were cutting the new threads you were probably making the hole bigger in diameter than what it was since the tap was harder to turn.
 
(quoted from post at 16:41:35 03/07/17) When the same model tractor is also available in the UK, or other countries they did have a different parts book for them. I don't think the 202 was that way. Since Massey Ferguson doesn't make new parts, the companies that sell parts source the parts from wherever they can get them from. From the way it sounds, it sounds like you maybe ok since the other threads are probably a little smaller than the SAE sizes. As you were cutting the new threads you were probably making the hole bigger in diameter than what it was since the tap was harder to turn.

Oh yeah, it was very hard to turn, I was afraid of breaking it off in the hole. Then I was afraid of breaking the brass fitting off in the hole trying to get it threaded on enough. I debated using Teflon tape on the brass fittings thread but decided to go ahead and use it. Now I'm glad that I did. Maybe that little extra step kept it from leaking. :mrgreen:

I used the old brass fitting from the old pump in the new top hole in the top pump. It seemed to go in a little easier than the bottom one. Even though it was wrong as I see now, it didn't leak. I'm assuming because the top hole is the return line and is under less pressure.
 

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