Iseki TX1300/1500 Hydraulic Woes

[dantnz]

When I was looking into my issue, I slackened a pipe going in under the seat, and the amount of pressure was unbelievable oil went everywhere, just be careful to make sure what ever you slacken does not come loose and totally part company allowing you to retighten fairly swiftly should you need to, should you try that method,

Oil should be flowing around the pump all the time and the diverter valve then diverts the oil to the ram and pushes it down the bore lifting the arms up, there are 4 bolts pointing towards the gear leavers with the relief that will show you the top of your ram if you were to remove them and the cover plate.

Thanks Chris, I'm actually pretty good with system knowledge, its kind of why this one has me stumped!

What you said there about the system pressure being unbelievable perhaps points to my problem though, my system pressure is more of a fast ooze(!) than spraying oil everywhere, that's if I slacken off the inlet pipe, remove the cylinder head plug or take out the air bleed screw. So maybe I just don't have enough system pressure and I need to start with the pump. I wish I could test it to be sure! Might have to find out what thread the cylinder head plug is and get a gauge and adapter for it.

 

[dantnz]

Had another look tonight. Took out the cylinder end plug and checked the flow again, yes there is flow, but I can stop the flow with just finger pressure!

So obviously the pump is faulty, I'll need to get some o rings and rebuild it. From the parts cat, I think I need 4 x P22 HS90 and 1 x G50 HS90. If anyone has any more info than that on the o ring sizes and material I'd be grateful, although I can take a fairly good guess at equivalent UK sourced sizes any more info would be great.

Hopefully its just the o rings gone and nothing else. I might open up the pump and take a look tomorrow night just in case there is more to the problem. Hopefully nothing else is gone inside as replacement pumps and quite expensive!

 

[fxrs55]

You didn't put the pump on upside down by chance?
Anyway, I've rebuilt my hydraulic pump 2 two times and I got the
o-rings which there are 6 total and one seal from Agco parts.
I got the part numbers using a Massey Ferguson tractor
model number 1120.

Try this dealer

Isle Of Wight Newport C & O Tractors Ltd 01983-524413

3702488M1 SEAL, OIL 1 req

3702467M1 O-RING 4 req

3702473M1 O-RING 1 req

3702458M1 O-RING 1 req

I have also used the white field boss 16 for part numbers. Agco sells
parts for Massey and White.

 

[dantnz]

That's fantastic information, i can order online with those part numbers.

Thanks so much! Dan

PS. - I didn't put in on backwards - luckily I have two of these tractors so I can always check the other one during those moments of doubt!

 

[dantnz]

Just had a quick look inside the pump, nothing obviously wrong. The o rings are a bit hard, bit not degraded, I'm really hoping that is the problem as it's a fairly easy fix.

How did you get the inner set of bushes out?

 

[Ilikeurtractor]

I haven't seen a lot of "bad" pumps but I know the clearances have very tight tolerances to develop the required pressure and avoid recirculation. I don't know if that can always be easily seen. Hopefully in your case the pump is ok.

 

[fxrs55]

Just had a quick look inside the pump, nothing obviously wrong. The o rings are a bit hard, bit not degraded, I'm really hoping that is the problem as it's a fairly easy fix.

How did you get the inner set of bushes out?

I was able to drive one of the bushes out through the opening where
the shaft comes out. I carefully heated the pump body
and while wearing a heavy glove I banged the hot pump body
on a 2x6 to get the other one out.

Also, I believe the o-rings on the 4 bushings does two things.
One, it seals the bushings to the pump body. the other thing
the o-rings do is if you look at the o-rings that go on the bushings
the o-rings are thicker then the width of the step on the end of
the bushing where the o-ring goes. When the o-rings are soft
and pliable I think they also keep the bushing pressed tight
against the rotating gears to keep the clearances tight
to help the pump have good pressure. But hey that's
just my perception. That all could just be a bunch of bull.

 

[dantnz]

I was able to drive one of the bushes out through the opening where
the shaft comes out. I carefully heated the pump body
and while wearing a heavy glove I banged the hot pump body
on a 2x6 to get the other one out.

Also, I believe the o-rings on the 4 bushings does two things.
One, it seals the bushings to the pump body. the other thing
the o-rings do is if you look at the o-rings that go on the bushings
the o-rings are thicker then the width of the step on the end of
the bushing where the o-ring goes. When the o-rings are soft
and pliable I think they also keep the bushing pressed tight
against the rotating gears to keep the clearances tight
to help the pump have good pressure. But hey that's
just my perception. That all could just be a bunch of bull.

Brilliant, thanks for that. It will a little while now before I can tackle this as I have a few more pressing jobs that need to be done.

When you reassembled, did you use a press to get the bushes back in or heat the casing again?

As far as I see the O rings are just a seal as the bushes make contact with casing, I'm sure it all contributes though. Hopefully its just the o rings and not wear to the bushes or casing.

Thanks, I'll drop another update when I get to the next step.

 

[dantnz]

You didn't put the pump on upside down by chance?
Anyway, I've rebuilt my hydraulic pump 2 two times and I got the
o-rings which there are 6 total and one seal from Agco parts.
I got the part numbers using a Massey Ferguson tractor
model number 1120.

Try this dealer

Isle Of Wight Newport C & O Tractors Ltd 01983-524413

3702488M1 SEAL, OIL 1 req

3702467M1 O-RING 4 req

3702473M1 O-RING 1 req

3702458M1 O-RING 1 req

I have also used the white field boss 16 for part numbers. Agco sells
parts for Massey and White.

I just placed an order through this company in UK: Chandlers Massey Parts | AGCO 5 star dealers

So far, great service, they rang back almost straight away after I emailed the parts list and asked for the lead time. It seems no one keeps these sizes in stock. There is a website called misumi where you can order Japanese sizes but its really hard to use - set up for large corporate orders.

How did you get the MF part numbers? Could be a great way to get some of these smaller parts in future.

 

[fxrs55]

Hey Dan,
The bushings are not meant to be a press fit. They just get stuck over time.
After you get all of them out you will want to clean and polish them
with a piece of crocus cloth or a scotch brite pad. The bushings
should slide in and out easily so when the pump is assembled the o-rings
constantly keep the bushings pressed against the sides of the pump
gears thereby minimizing the amount the gears move back and forth.
This also keeps the gap between the gears and the bushing
to a minimum for better suction in and pressure out. I believe
the bushing are suppose to be able to move freely to compensate
for wear . I think that is why the bushing have a flat on them.
And because the bushings can float the flat keeps them from
spinning in the pump housing bores. But hey that's just
my mechanical though processing of how I think things work.
I don't have any documentation to substantiate any of the above
information, Its just my opinion.
Now for where I get part numbers, I go to the Agco parts book
web site. You will want to use the north American web site so
you can view the parts books. The European site wants you to get a password
from your local dealer. On the north American site look for guest user
on the bottom right side of web page. at guest user click on view books.
from there choose Massey Ferguson, then parts, then tractors,
then compact, then 1120. Be aware that the 1120 has a different
front axle than ours. That is why I also use the White field boss 16
for parts. The White has the same front axle we have. Both
of these tractors were made by Iseki.

Try this link. If this works, look for the browse books on the top left.
If this doesn't work for you, try the other way outlined above.

AGCO Parts Books

Also, Check the link below.

TractorData.com - Farm tractors

You can lookup tractors of many manufactures.
My tractor was made in 1978. From what I have found
the TX1300 version I have was made from 1978 to 1981.
Also over here in the colonies these tractors were sold under
the bolens name. Mine is a bolens G154 which is an Iseki TX1300F.
In 1982 Bolens still sold a G152/G154 but it was now an Iseki TX1502/TX1504.
From what I have found 1991 was the last year Bolens sold Iseki tractors under
the Bolens name. I have a PDF of a 1996 Garden way Service seminar
which list the Bolens/Iseki tractors and attachments. I could e-mail
it to you if you want. One of the reasons I know some of this is because
we can't buy new factory Iseki parts in the USA because there are no
Iseki dealers here but there are Massey Ferguson dealers and if I
can come up with a part number under Ferguson they can get
me new parts through Agco who now owns Massey Ferguson.
Its a round about way of finding parts. Ok this has gotten
way to long. It has taken me over two hours to finish this darn post.
I had to stop and go find out why our furnace wasn't working. I worked
11 hours today climbing around one of our CNC lathes at work trying to fix
it and when I get home the house is cold but my wife and son did not
notice the furnace isn't working. I found the furnace ignitor had come lose and wasn't making contact so no spark. Do my post look upside down across the pond?

Ok, this has gotten way way way to long.