853 tilt cylinder

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perry

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Aug 22, 2006
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Guys, I guess this has probably been discussed but couldn't find the thread?.
My tilt cylinder creeps down with engine off, was there something said about an adjusting screw to stop this?, or will I need new seals?.
Thanks
 

Bandit1047

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Jan 13, 2008
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I am no expert on hydraulics, however I know that if air is getting into the system, cylinders with drift. Starting with the simple solution first, I would tighten all the hose connections to make sure they are not leaking. Do not over tighten. I think some systems also have lock outs, when the system is shut down valves close off the system preventing drift. This is just a WAG (wild A** Guess) on my part, however it is food for thought. Another thing that may do this besides seals is if you get dirt in the spool valves, they may stick open just slightly. I hope you get a real hydraulics expert to replay to my thread, I would be interested to know how far off I am on my Guess. Joe
 
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perry

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Aug 22, 2006
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869
I am no expert on hydraulics, however I know that if air is getting into the system, cylinders with drift. Starting with the simple solution first, I would tighten all the hose connections to make sure they are not leaking. Do not over tighten. I think some systems also have lock outs, when the system is shut down valves close off the system preventing drift. This is just a WAG (wild A** Guess) on my part, however it is food for thought. Another thing that may do this besides seals is if you get dirt in the spool valves, they may stick open just slightly. I hope you get a real hydraulics expert to replay to my thread, I would be interested to know how far off I am on my Guess. Joe
No leaks, just creeping.

Thanks
 

Tazza

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No leaks, just creeping.

Thanks
If it was me, i'd re-seal the rams and see how you go. If it still drops it will most likely be your load checks on the control block. I have seen the seals shredded causing the exact same fault as you have.
 

skidsteer.ca

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Jan 20, 2006
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3,853
If it was me, i'd re-seal the rams and see how you go. If it still drops it will most likely be your load checks on the control block. I have seen the seals shredded causing the exact same fault as you have.
You can pressure test the seals on the cylinder piston with compressed air and see if they are sealed or bypassing the piston and escaping out the oposite port on the barrel.
Ken
 
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perry

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You can pressure test the seals on the cylinder piston with compressed air and see if they are sealed or bypassing the piston and escaping out the oposite port on the barrel.
Ken
'''''load checks on the control block''''
That's it!!, where might the block be?.
 

Tazza

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'''''load checks on the control block''''
That's it!!, where might the block be?.
Check where your spools are, they are either on both ends where the spool slides in and out or the side where the tube lines attach. If you need, i can take a pic of my control block to give you a better idea, its a 751 so it won't be the same and its filthy but it will give you an idea.
Ken's idea of compressed air is isn't silly, quick and easy, probably easier than struggling with your load checks!
 
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perry

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Joined
Aug 22, 2006
Messages
869
Check where your spools are, they are either on both ends where the spool slides in and out or the side where the tube lines attach. If you need, i can take a pic of my control block to give you a better idea, its a 751 so it won't be the same and its filthy but it will give you an idea.
Ken's idea of compressed air is isn't silly, quick and easy, probably easier than struggling with your load checks!
That's close enough Ken, I'll find it.

Thanks
 

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