hydralic leaks

[rider10099]

I have a couple of leaks in my JM204. One on the front axle and other at the rear. The rear leak is acutally a blow by kind of leak coming out of the vent tube in front of the seat. I haven't investigated the front one yet. But could the vent leak be caused by a blockage in the hydralic filter under the seat? I have a new filter and could change it out. Thanks for your ideas.
Cheers
John

 

[studor]

Burps of fluid out of the vent behind the seat on a 284 are fairly common depending on the angle of operation ie up hill-- it could also be overfilled -- not sure about the 204 -- you have the vent in front of the seat? Does it do it more on the downhill or do you just notice the mess? If you have not previously changed the fluid it would be a good idea to do it and check the screen anyway.
The "front axle leak" could be from the power steering -- sometimes the angle fitting to the hose is not tight enough and depending on your loader, it is possible to pinch the hose between the tire and loader bracket -- the hose loses -- don't ask me how I know. The fluid drips all over the front axle and the floor puddle makes you worried the your front diff is leaking
If you search on this and other forums you will find that some guys have modified the vent location and the vent itself to stop the hydro fluid from coming out the vent -- if you can provide more details I am sure the good folks on this forum will help you out

 

[greg_g]

A vent tube in FRONT of the seat would typically be for the transmission. It's important to use NON-FOAMING gear oil, and (obviously) not to overfill. Same with front axle, although there may be no dipstick. You only need enough non-foaming gear oil (not UTF) to cover the rotating axle by a 1/4" or so.

//greg//

 

[ToolManRick]

I had similar problems with the vents allowing some fluid to escape. I have a Northern Tool version of the Jinma 204. The vent in front of the seat (for the transmission) is extended to a height of about 3 inches. A vent the same as used on the front axle, unextended, would be a real problem. When I changed out the fluids I replaced the transmission fluid with 90W GL-1. That solved the problem with that one. The only time it burbs now is if I have to take in on the road in 3rd gear, so I just tuck a rag around it.

The hydraulic tank vent was fixed by making an extended version of the same vent on the transmission. I basically cut the vent in half at the wrench flats and brazed a piece of steel tube to make it 3" long. I have some very steep hills and have not had a burping problem since the fix.

Hope this information helps.

 

[rider10099]

Thanks for the thoughts - no that I think about it I did put some utf in the tranny - so I will drain and refill. I will check the hoses on the front next weekend.
Cheers
John