leaking hyd. fluid

[Ottsrx7]

noticed that I had some hyd. fluid leaked from one of the rear wheel hubs. .. its all over the rim and tires as well as a little puddle on the floor......Is this a common problem? What is the fix? Any precautions before I tear the hub apart and replace the seal?

 

[Tazza]

It is common, what machine do you have? some are easy, some are not so much.

 

[Ottsrx7]

It is common, what machine do you have? some are easy, some are not so much.

763G series

 

[Tazza]

763G series

Remove the tyre, loosen the big bolt on the end of the hub a few turns so the washer is free. Install two hydraulic jacks behid the hub with the pump facing down, one on either side, pump them up as tight as you can, smack the back of the hub with a hammer, this should shock the hub off. You keep the bolt in so the hub does not go flying off and hitting you or someone else. You now have access to the seal, you may be able to remove it by drilling a hole and screwing in a self tapping screw and using pliers to pull it out. It may be a bit tight, but you get the idea. Install a new seal and attach the hub, do up the bolt. Presto
Hopefully thats reasonably clear.
On earlier models it was much harder.

 

[Rich M-37]

Remove the tyre, loosen the big bolt on the end of the hub a few turns so the washer is free. Install two hydraulic jacks behid the hub with the pump facing down, one on either side, pump them up as tight as you can, smack the back of the hub with a hammer, this should shock the hub off. You keep the bolt in so the hub does not go flying off and hitting you or someone else. You now have access to the seal, you may be able to remove it by drilling a hole and screwing in a self tapping screw and using pliers to pull it out. It may be a bit tight, but you get the idea. Install a new seal and attach the hub, do up the bolt. Presto
Hopefully thats reasonably clear.
On earlier models it was much harder.

Ottsrx7, When you have all 4 wheels off the ground, don't forget to check for play in your axel bearings. There should be no side to side play, Hold tire push in and pull out. no play. I am currently replacing axel bearings on my 873. I thought it was just seals. Rich Szklany

 

[Ottsrx7]

Ottsrx7, When you have all 4 wheels off the ground, don't forget to check for play in your axel bearings. There should be no side to side play, Hold tire push in and pull out. no play. I am currently replacing axel bearings on my 873. I thought it was just seals. Rich Szklany

Will do, I plan to do this tomorrow sometime. What is the easiest way to fill the chain case.... I assume I will loose some fluid after removing the old seal? Bearings feel OK.

 

[Tazza]

Will do, I plan to do this tomorrow sometime. What is the easiest way to fill the chain case.... I assume I will loose some fluid after removing the old seal? Bearings feel OK.

If you are corried about losing fluid, jack that end up just a little higher, you won't lose much. For such a small loss, put the machine on flat ground, remove the front plug and fill it through there if you can. You want it level with the threads. If there is a lot to out in, lift the cab and remove an inspection plate, fill it from there and ensure its sealed up good. You don't want any water getting in there. If the oil is milky, it must be changed!
As Rich M-37 stated, ensure there is NO back and forth float. Over time it will take the bearings and seal out.
Good luck with the job, its not really hard to do, the hardest part will be removing the hub, they are on there really tight! Two, two tonne hydraulic jacks and a few swift hits with a copper hammer got them free for me. Just keep the bolt in there, even if its only a few turns, i'm not kidding when i say the hub can fly across the shop and damage you or someone else!!!! Especially if you use a sledge to *tap* it.

 

[Ottsrx7]

If you are corried about losing fluid, jack that end up just a little higher, you won't lose much. For such a small loss, put the machine on flat ground, remove the front plug and fill it through there if you can. You want it level with the threads. If there is a lot to out in, lift the cab and remove an inspection plate, fill it from there and ensure its sealed up good. You don't want any water getting in there. If the oil is milky, it must be changed!
As Rich M-37 stated, ensure there is NO back and forth float. Over time it will take the bearings and seal out.
Good luck with the job, its not really hard to do, the hardest part will be removing the hub, they are on there really tight! Two, two tonne hydraulic jacks and a few swift hits with a copper hammer got them free for me. Just keep the bolt in there, even if its only a few turns, i'm not kidding when i say the hub can fly across the shop and damage you or someone else!!!! Especially if you use a sledge to *tap* it.

thanks for the info.... did everything you said and swapped the seal out...the leak is fixed! wow, you were not kidding about the hub. I actually had to heat it up with the torch and used (2) porta power to apply pressure. when i smack it wow did it ever pop!!! could def. do some damage.

 

[Tazza]

thanks for the info.... did everything you said and swapped the seal out...the leak is fixed! wow, you were not kidding about the hub. I actually had to heat it up with the torch and used (2) porta power to apply pressure. when i smack it wow did it ever pop!!! could def. do some damage.

Good to hear you got it all done!