Oil & Fuel Hydraulic oil and filter change, no lift,air in oil

   / Hydraulic oil and filter change, no lift,air in oil #1  
D

dan1948

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Jan 28, 2004
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15
My 2500 Yanmar became very slow lifting a 4.5 ' disc. Decided to check filter screen. Oil came out very dark amd filled with metal particles. Screen was not as clogged as I have seen, but, pretty bad. Drained all oil and removed and cleaned screen. Replaced oil with same volume as I removed (+-) used universal fluid from TSC. 3 point will not raise nor will loader, oil on dipstick shows air bubbles. I closed all cylinders on loader but now I don't remember if I lowered the 3 pt. Anyway any input is needed and appreciated. Thanks. Dan
 
   / Hydraulic oil and filter change, no lift,air in oil #2  
Dan,
It takes a few cycles of all the cylinders to get rid of the air that may have been introduced.
 
   / Hydraulic oil and filter change, no lift,air in oil #3  
I'd guess you're sucking the air in - somewhere.
Without knowing your particular tractor, if it has a spin on filter that is "sucked through" I'd DOUBLE check that the old gasket came away with the old filter.
 
   / Hydraulic oil and filter change, no lift,air in oil
  • Thread Starter
#4  
Inspector507 said:
Dan,
It takes a few cycles of all the cylinders to get rid of the air that may have been introduced.
Click to expand...
How do I get the cylinders to cycle when nothing happens when I attempt to raise 3ph or loader? Dan
 
   / Hydraulic oil and filter change, no lift,air in oil
  • Thread Starter
#5  
Reg said:
I'd guess you're sucking the air in - somewhere.
Without knowing your particular tractor, if it has a spin on filter that is "sucked through" I'd DOUBLE check that the old gasket came away with the old filter.
Click to expand...
Tractor has a metal screen that is cleaned and replaced. kinda wish I had a spin-on. Thanks for your reply. Dan
 
   / Hydraulic oil and filter change, no lift,air in oil #6  
You may have to check the punp. I've changed my fluid several times & had no air problems to deal with
 
   / Hydraulic oil and filter change, no lift,air in oil #7  
You definitely have a problem. There should not be any metal particles in the hydraulic oil. THose particles have been worn off off something, likely the hydraulic pump.
 
   / Hydraulic oil and filter change, no lift,air in oil
  • Thread Starter
#8  
Turned out to be the shear key on hydraulic pump (.83) With new gasket about 3-4$ total. Plus, I got to practice getting up and down on my creeper:). Thanks for the help guys. Dan
 
   / Hydraulic oil and filter change, no lift,air in oil #10  
Good for you! Always nice to hear when it turns out to be $3 or $4 rather then $1,000.
 
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