×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

*
*
*
*

Thanks. We have received your request and will respond promptly.

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Clogging of Filters used in Hydraulic System - Due to Cellulosic Material

thread1083-474242

Clogging of Filters used in Hydraulic System - Due to Cellulosic Material

Clogging of Filters used in Hydraulic System - Due to Cellulosic Material

(OP)
Hi,

A particular filter that is in use for the Hydraulic System of an aircraft that i maintain, keeps on clogging. When we cut open the filter, we find that it is heavily clogged with a dark greyish substance. When we send the dark greyish substance to the Laboratory for examination, the laboratory told us that the substance is a cellulosic material. I'm puzzled because i'm not aware of such material being used in the Hydraulic System. Does anyone have a similar experience?

One possible suspect is the filter itself, but when I tried to look through the filter OEM's website, but there is no material of the construct of the filter there.

Thanks in advance, and regards

Ethan

RE: Clogging of Filters used in Hydraulic System - Due to Cellulosic Material

Maybe someone left a rag or paper towels or tissue in the system; perhaps the tank.

The crack team of assemblers I worked with did that with the cooling system on a diesel, put a rag in a line to keep the coolant from dribbling or some such while servicing. I guess the rag got pushed back where it wasn't hanging out anymore. A 2 stroke supercharged diesel actually depends on cooling and rag as found throughout the heads.

Best of luck finding it. I'd start with any reservoir.

RE: Clogging of Filters used in Hydraulic System - Due to Cellulosic Material

Maybe paper hand towel.

Ted

RE: Clogging of Filters used in Hydraulic System - Due to Cellulosic Material

What is the hydraulic fluid? Is it possible there is some degredation or contamination of the fluid? Esters and cellulose aren't too different in terms of atomic makeup.

RE: Clogging of Filters used in Hydraulic System - Due to Cellulosic Material

I think the lab just told you that you have a paper filter.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login

Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now
Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close