Re: Hydraulic Cylinders

Posted by Steve@Advance on March 02, 2019 at 15:03:35 from (66.169.147.211):

In Reply to: Hydraulic Cylinders posted by big_red_man on March 02, 2019 at 14:14:29:

Are you sure pressure is being applied to each side of the cylinder?

If the tractor valve is set up for a one way cylinder, it will only apply pressure to one hose, the other will only be a return to tank.

A true one way cylinder will almost always have a large rod, almost the same size as the bore. The rod seal will not be capable of holding pressure, it only serves as a dust seal.

If you are sure you are getting pressure to each end, and the cylinder is not responding, you will need to check the internal seals.

Disconnect and plug one hose, leave the cylinder port open. Block the cylinder mid way on the stroke, operate the valve to pressure up the attached line. Hold the valve and watch for oil to come out the open port. Once the slack is out and the cylinder is not moving, there should be very little, preferably no oil coming from the open port. You should also hear the engine load and see the line pressure against the blocked cylinder. That proves pressure is being delivered.

Reverse the procedure, remove and cap the attached line, attach the other. Same test, should give the same result.

If oil flows through the cylinder, the piston seals are bad. If the engine/pump do not load, there is no pressure being applied to that circuit.

Replies:

Add a Reply! You must be Logged In to Post Name: E-Mail: Subject: Comments: Optional Link URL: Link Title: Optional Image URL: Optional Video Title: Optional Video Embed: Advanced Posting Options Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks. No political comments, hate speech or bigotry of any kind will be tolerated. Violations will be removed and posting privileges may be permanently revoked without notice.   Advanced Posting Tools   Select Gallery Photo  Attach Serial No List  Return to Post  Upload Photos/Videos Choose Files from your local computer Upload one or more videos to your post. Photo and video filesizes should be less than 5MB. Formats allowed are gif, jpg, png, ogg, mp4, mov, and avi. Be sure to use filenames without spaces or special characters, and filetypes of 3 digits lower case.

TRACTOR PARTS	TRACTOR MANUALS

We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]