Hi forumer,
As you know, all the hydraulic oil colour is thin clear colour. Difficult to detect the leakage during running especially in machine tool where totally covered and expose to cutting coolant.

I would like to know if you having any experience troubleshooting the leak point of your hydraulic system.

I have heard about "Red Dye" that pour into the hydraulic tank and easily detect leak point by the red colour. Can you help me to idetify maker and code of the "Red Dye"?

quote:

Can you help me to idetify maker and code of the "Red Dye"?

Caterpillar part number 9U-5031 - Red
pat number 9U-5032 - Blue

page 3-51

http://www.cat.com/cda/files/1...ion.pdf?m=289727&x=7

This message has been edited. Last edited by: Doug Hanson,

Multiple ways of detecting leak
- Adding red dye to oil, same as what Doug has explained, however this is not widely practiced.
- Audis sound testing, used for smaller Hydraulic equipment.
-Adding Fluorescent dye to the oil and detecting the leaks under black lights.

SDK.

Besides the other suggestions another method is to thoroughly clean and dry suspected area and either: 1) Spray dye-penetrate developer around the suspected area or 2) Add baby powder to suspect area. Then operate machine. The oil absorbs into the powder where it is then visible.

The developer is made by Magnaflux and others, and is white in colour. It washes off after leak check is finished.
http://www.markingpendepot.com...=VIEWPROD&ProdID=287

Dear All,

Thanks for helping me.

I'll try to contact Caterpillar Malaysia for the Dye.

Norman

quote:

Originally posted by NA:
Besides the other suggestions another method is to thoroughly clean and dry suspected area and either: 1) Spray dye-penetrate developer around the suspected area or 2) Add baby powder to suspect area. Then operate machine. The oil absorbs into the powder where it is then visible.

The developer is made by Magnaflux and others, and is white in colour. It washes off after leak check is finished.
http://www.markingpendepot.com...=VIEWPROD&ProdID=287

How is your experience with this powder methodology so far?