Operation Manual

Section:
Page:
Engine:
Specification Data
3.8
3-6-01
S/BVM 628
© 0883
© 25 459 1
3.8 Dye Checking of Metal Surfaces
The dye checking process for detecting
metal surface flaws requires the following
agents:
Detergent (trichlorethylene),
Diffusion fluid (red),
Developer(white)
Cleaning the part
- Apply the detergent at least one hour
before applying the diffusion fluid to
ensure that any grease is removed from
the metal surface and its flaws (cracks,
fissures, etc.) (Fig. 1) (see safety in-
struction, page 3-6-02)
Applying the diffusion Fluid
- Apply fluid by spraying gun, hair brush
or by dipping part into the directionsfor
use (Fig. 2).
- Wash off surface by water, so fluid will
remain in the flaws only (Fig. 3).
- Wipe surface clean with a dry rag.
Applying the developer
- Once the surface is dry, apply on a
thin film of developer by spray gun or
hair brush.
- Let developer dry for one or two minu-
tes.
- The "blotting paper effect" of the white
developer will make the red fluid beco-
me visible in the flaws (Fig. 4).