Go Back   OrangeTractorTalks - Everything Kubota > Kubota Talk > Service, Repair & Maintenance

Service, Repair & Maintenance Offer your Kubota service advice, repair procedures or maintenance tips. Have a service related question? Post here.


Reply
 
Thread Tools Display Modes
Old 09-26-2010, 06:17 AM   #1
cdev007
New Member
 
Join Date: Sep 2010
Location: Montreal, QC
Equipment: Kubota B8200HST w Loader and Backhoe
Posts: 3
Default Hydraulic leaks into Engine

I have a B8200HST. For some reason my transmission fluid gets really low. I had to refill twice and had to add a lot. There is no evident leaks anywhere. But the engine crankcase oil fills up and overflows through the valve cover breather.

I think hydraulic oil found its way to the crankcase. I am thinking 2 scenarios:
1) The hydraulic pump has a busted seal and the hydraulic pressure pushes oil through the pump shaft into the engine

2) The transmission fluid leaks to the engine through the clutch and then to the crankcase.

I think number 2 is unlikely. Oil would probably leak down from the clutch housing.

Any of you ever had this problem? Maybe there is another path the oil takes I cannot think of?
If the problem is the Hydraukic pump, how do i fix it? HELP
cdev007 is offline   Reply With Quote

Sponsored Links  
Advertisement
Old 09-26-2010, 08:31 AM   #2
bruceatlam
3rd Yr. Apprentice
 
Join Date: Aug 2009
Location: Camarillo, California
Equipment: B20, FEL, box blade, flail mower
Posts: 410
Default Re: Hydraulic leaks into Engine

Lots of examples of #1 as the problem.
bruceatlam is offline   Reply With Quote
Old 09-26-2010, 01:02 PM   #3
cdev007
New Member
 
Join Date: Sep 2010
Location: Montreal, QC
Equipment: Kubota B8200HST w Loader and Backhoe
Posts: 3
Default Re: Hydraulic leaks into Engine

I suspect no1 as well. Is it easy to fix? I already had changed some o-rings on the gear pump about a year ago. I did not change the seals.. I will go to the dealer and ask for a full rebuid kit (If they offer it) and the exploded view of the parts. Maybe they have instructions on how to do it properly.
cdev007 is offline   Reply With Quote
Old 09-26-2010, 09:40 PM   #4
dusty-t
4th Yr. Apprentice
 
dusty-t's Avatar
 
Join Date: Feb 2009
Location: Mountforest Ontario
Posts: 975
Default Re: Hydraulic leaks into Engine

It happened on my B7200.I ended up putting a new pump on. $500.00 or there abouts. You can try to just replace the seal first. You have to get lucky sometimes. Good luck. Dusty
dusty-t is offline   Reply With Quote
Old 09-27-2010, 06:25 AM   #5
Ed Hill
1st Yr. Apprentice
 
Join Date: Jun 2009
Location: Wheelock, VT
Equipment: BB0548, B1750, 1640 FEL, Sitrex SM150 mower, Herd 5.5 sander, Bush Hog LLR72,
Posts: 48
Default Re: Hydraulic leaks into Engine

Ed Hill can speak to this problem. I found I was leaving a trail of oil on the lawn. Discovered low transmission oil but high level of engine oil. I changed the seal in the hydraulic pump and all is well. While I had the B1750 apart, I installed new hoses for coolant and oil and changed over to Amsoil for both engine and transmission. The tractor seems to run better and quieter but it could be my imagination.
Ed Hill is offline   Reply With Quote
Old 09-27-2010, 03:20 PM   #6
stuart

3rd Yr. Apprentice
 
Join Date: Aug 2009
Location: Aldergrove, BC, Canada
Equipment: B7001 with loader & tiller, 3 point hitch and 4' rear blade
Posts: 279
Send a message via Yahoo to stuart
Default Re: Hydraulic leaks into Engine

Another vote for 1.
On mine, the fluid was leaking through the keyway where the injector pump drives the hydraulic pump, through the injector pump into the crankcase. The pump has previously been improperly installed, so the repair cost over $1000 by the time it was finished.
stuart is offline   Reply With Quote
Old 09-27-2010, 07:26 PM   #7
Service Dept Vic
Moderator
 
Service Dept Vic's Avatar
 
Join Date: Feb 2009
Location: Southern Alberta Canada
Equipment: B-5000
Posts: 2,404
Default Re: Hydraulic leaks into Engine

Yep, you guys are right! It's the oil seal on the front of the hydraulic pumps input drive shaft. Seal is around three bucks, real quick repair, under an hour for a first timer, simple hand tools nothing special, git er done!
__________________
Tires, Parts, Tiller Tines and Manuals for North American and Grey Market Kubota/Zennoh Tractors

Oh Ya! We've got that!
Service Dept Vic is offline   Reply With Quote
Old 10-08-2010, 06:37 AM   #8
cdev007
New Member
 
Join Date: Sep 2010
Location: Montreal, QC
Equipment: Kubota B8200HST w Loader and Backhoe
Posts: 3
Smile Re: Hydraulic leaks into Engine

Thanks to all. I will go to the dealer and buy the necessary pump seals and replace them. Will let you know. Maybe I will be lucky and not have to replace the entire pump. Again, Thanks to all. This is my first time on this forum and so far it proves to be excellent.
cdev007 is offline   Reply With Quote

Reply

Tags
hydraulic oil in engine

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -8. The time now is 11:39 PM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.