1995 Jinma 204 Hyro fluid in the engine crankcase

[Crispy80]

New to the forum, but pretty sure after reading thread 2 below that the hydraulic oil is making it into the engine crankcase. (Back story) The bucket and steering was operating fine, but the hitch was not moving. I noticed the hydraulic fluid in the back end of the tractor was not even touching the dipstick. I added about 3L of fluid which did not even bring it up to the low level. I remembered the 'lowering speed adjustment valve' knob between my knees (when sitting in the seat) and opened that way up.. and it operated fine.

Days later I checked the crankcase oil and it was coming out of the dipstick hole. After seeing this high level of oil I drained it.. and turns out to be 3L.. (similar level to what I had added).

I have run the tractor for about an hour after removing the 3L of fluid from the crankcase, and all the hydraulics work fine. my concern is that if I want to top up the hydraulic again it will dump into the crankcase. Or over time it will leak back to the engine
I see the member Affordable always seems to have the answer. Is the hydraulic fluid getting into the engine through the hydraulic pump? Is this a rebuild or a replacement? Also I am in Canada, can I get these parts here or can they be shipped from the US?

Any help would be great!

 

[Crispy80]

post 2

 

[Crispy80]

3rd post required to put links in.

 

[Crispy80]

1- https://www.tractorbynet.com/forums/chinese-tractors/69047-hydraulics-question-jinma-224-a.html
2- Hydraulic Pump Leaking badly | CHINESE TRACTOR WORLD FORUMS

 

[Dave M7040]

A common pump failure is for the main seal on its shaft leaking and the hydraulic oil enters the crankcase.

I do not believe just filling the hydraulic reservoir will lead to hydraulic oil in the engine unless it is entering by way of the main seal on the pump drive.

I have been surprised in the past about the low cost of hydraulic pumps on some Chinese tractors and getting a complete pump is likely the most practical fix.

Look at the attached screen shot from an American site. A complete pump for $231.

When I Google Jinma Canada I end up with this place for parts.

Jinma Tractor Parts | ASIAN TRACTOR PARTS

Dave M7040

 

[Jim Nelson]

About 15 years ago I had a Kubota B7200 that started dumping hydraulic oil into the crankcase and replaced the seal on the hydraulic pump and it was ok for a while but soon started again. I replaced the pump and that took care of the problem. It was a little pricey but you gotta do what you gotta do.

 

[5030]

One thing I'd do right away is drain the crankcase fully and refill with motor oil. Hydraulic oil and engines don't get along well.

 

[Rebeldad1]

I'd just park the tractor. Hydraulic fluid will dilute the engine oil and cause damage.
A overfilled engine crankcase can also cause damage.

 

[Crispy80]

I 100% agree on changing the engine oil. I've attached some pictures (hoping this works) Can someone confirm that this is a CBN-E310 RH Pump.
I have also read when you remove this pump there are 4 bolts, but you want to remove the 2 large bolts first which connects it to the engine. which are these 2 bolts as mine appear to be the same size? What are peoples thoughts on rebuilding the pump?