Contact US

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

Italgru crane hydraulic shcematic

Italgru crane hydraulic shcematic

Italgru crane hydraulic shcematic

Hi everyone, I'm newbie in Mechanic.
Anyone know about reading hydraulic schematic of crane (Italgru C1515)?
I'm concerned about the workflow of hydraulic from starting/working/standby and shutdown especially of Winch.
I attached P&ID of hydraulic shcematic.

Thanks in advanced.

RE: Italgru crane hydraulic shcematic

Most large hydraulics manufacturers include a section on their website on how to read hydraulic schematics. There are also many engineering reference sites with the same information.

RE: Italgru crane hydraulic shcematic

@Jboggs: Unlucky, Italgru does NOT have. Would you refer some? Many thanks.

RE: Italgru crane hydraulic shcematic

@Jboggs: It's not the same information as you mention. I don't think those simple valves would deal with Italgru system.

RE: Italgru crane hydraulic shcematic

Start with the basics and then move on like this at of lists.


But whilst I can read P&IDs fine, hydraulic schematics boil my brain. Also helps to have a description of the operation so you can follow what should be happening.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: Italgru crane hydraulic shcematic

Upon quick review that schematic looks to be nicely done.

It appears to use ISO symbols for fluid power, and actually use them correctly.

Guides to ISO Fluid Power Symbols can be easily found on the web.

It's a complicated piece of equipment, with a correspondingly complicated hydraulic schematic. As LittleInch already said, a description of operation will be very helpful.

RE: Italgru crane hydraulic shcematic

A hydraulic schematic is a 2D version of a hydraulic logic program. Just as you would not pick up 5000 lines of C or Python and ask "what does this all do" you cannot deal with a complicated hydraulic program so easily.

The typical software analysis starts with identifying the inputs and the outputs. Which levers and switches are ones people operate and where does the fluid flow come from (look for pumps).

Then you need to have the operator manual to indicate what startup steps are taken, such as where are the controls during startup. Then you can trace the flow based on the valve positions - sometimes that will lead to other valves shifting position and guiding flow.

There are often parts of the circuit in place to keep damage from being done - pressure relief valves in particular. They usually don't do anything unless the operator screws up.

Basically it's a software analysis job with pictures instead of words. It is also related to electronic circuit analysis in that it has many of the same functions - particularly in check-valves similarity to diodes. One could wire up an electrical analog to the hydraulic system and observe the voltages and current flow.

RE: Italgru crane hydraulic shcematic

One thing to add - on the schematic there are valves that appear to be operated by parts of the machine moving into position or nearing mechanical limits - you need to know where in the machine they are located and what operates them to understand what they specifically do.

At least they labeled the main functions and most functions are independent; one can slew and winch at the same time.

RE: Italgru crane hydraulic shcematic

@LittleInch: Thanks for your help. I contacted with operator but sadly they don't have description.
@MintJulep: I search ISO symbols and see almost valves I need there. Manay thanks.
@3DDave: The way you mention is what I'm going to test: insert pressure gauges to all port in the block to see sequence of hydraulic.

RE: Italgru crane hydraulic shcematic

if you have physical system in front of you, start with pump and electrical motor. as you move along the line drawing, mark it on your drawing and cross check with the physical system. it helps you to understand the overall flow but not the details.


RE: Italgru crane hydraulic shcematic

Quote (phuongnguyen)

Besides, anyone know what's the name of these valves in red rectangular (attached file) and how it works?

it's a Wanfluh product. : Link
you can contact them if you want to know the details if you can't understand the datasheet.
most of the time I liaise with their UK office and so far very helpful.


RE: Italgru crane hydraulic shcematic

@BEMPE16524: I thought I was 2 way cartridge valve as you mentioned but is it possible to flow from B to A if B generates force more than spring's force?

RE: Italgru crane hydraulic shcematic

Flow from A to B and from B to A are in the data sheet.

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


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