Hydraulic Fluid Leaking from res. Cap?

/ Hydraulic Fluid Leaking from res. Cap? #1  

gt14

Silver Member
Joined
Jul 19, 2005
Messages
163
Location
Aumsville Oregon
Tractor
Yanmar YM146 YM165D
I have hydraulic fluid leaking and I believe it is coming from the pin hole in the reservoir fill cap. I noticed the hole when I tried to figure out where the leak was coming from. Has anyone else every had something like this happen. It squirts out every few minutes not a steady stream. I did recently drain the hyd. tank and unhook the lines. I don't know if air in the system is the cause or something else. Do these systems need to be bled like brakes?
 
/ Hydraulic Fluid Leaking from res. Cap? #2  
No, they do not need to be bled, they are self bleeding.
The only time I have seen oil squirt out that hole is when the tank is over filled. The oil level should be down about 3", there is a ring of holes in the filler neck that you can see, if it is not over filled. If you can't see the ring of holes, it is too full.
 
/ Hydraulic Fluid Leaking from res. Cap?
  • Thread Starter
#3  
Thank you the tank is overfull. I will take a little out.
 
/ Hydraulic Fluid Leaking from res. Cap? #4  
I have a ym2000 and had the same problem. I found that the case vent was clogged. It is on top of the diff. case under the seat, a +-1/4" pipe bent in a U shape. Just turn counter clock wise to remove and cleared the clog.

Hope this helps.
 

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