hydraulics 6245

[inky600]

Hi
I finally found after many years of slow and weak hydraulics what was causing the problem

The steel pressure pipe from the pump that goes up past the diff to the top the block , was damaged and had a split in it , So has slowy being getting worse over the yearsuntil finally gave up completely

My question is do you have to take the diff out to be able to replace it , as I am struggling to get the new pipe in , We got the old one out ok by cutting it , but can't seemt o get the new one in .

I think we need to take out the diff which would make it easy to reaplce but wondered if anyone else has had the problem and how the managed to replace the pipe . Obvioulsy if I can avoid taking out the diff I prefer not too.

 

[Renze]

have you tried from top and bottom ?
i mean, taking off the lift cover as well as the oil pump mounting plate ?

 

[inky600]

Hi

Yes we have taken off the top cover and taken out the pump at the bottom , we have now managed to get the new pipe in ast the diff , but seems impossible to feed it into both locations at the top and bottom . It has to be flared once in postion which sounds tricky as well

I think we have to take the diff out ....

 

[Renze]

I would just re use the old pipe with flared ends, cut out the bad section and fit it back together with standard compression fittings...
Oh, and i'd replace the pressure relief valve as a precaution measure...

 

[markku]

We did bend that pipe from our 7245 1990. It was that big job to change a new, that we decided to make a bit longer bush between pipe and bottom cover. Then we traded it to new 7745 Jubile at next year.

There comes really high forces that bend the pipe again, if you straight it or extend. It should be bended back to right dimensions and then weld a suppor via another side of differential gears. But im not sure is there any space for support???

 

[inky600]

Hi my dog eats fast food.

I think your idea was great , and wish I thought of before I cut the pipe , which we left too short to do a repair job . Of course I bought the replacement pipe from Zetor and was following the instructions which said "cut out the old pipe" ah well ......

Any way the good news is , we managed to do the job tonight without removing the diff, by using a oxy torch to heat up the pipe and help bend into place , everything seems ok , we did the flanges on the end of the pipe and all looks good . but was a tricky job... I figure if does not work well it cost me a new pipe and a couple of hours work and next time we take out the diff

Anyway tomorrow is the real test when I put everything back together and see what happens , hopefully the seals hold and I have hydraulics again -watch this space ....

Just for your info what created this whole problem was , some time in the past someone had repaired the diff for some reason and used bolts to put it back together instead of rivets , so the head of the bolts had stuck out about two mill too far which hit the pressure pipe and done the damage .... This time around we ensured the pipe was bent back a bit so would miss the bolt head as the diff spins around

 

[inky600]

Hi

Well all worked out well

I never had hydraulics so good , unbelievable ..

loader works like crazy

Mike