Komatsu PC1250-11 Original Instructions Manual page 376

MAINTENANCE PROCEDURE
The important inspection part (specified part in the box) must be checked with the color check.
The procedure of the color check is as follows.
1.
Provide the materials for the color check. (Cleaning agent, penetrant, developer)
2.
Spray the cleaning agent to dust and oil on the part to be inspected, and clean.
3.
Dry it after cleaning. Spray the penetrant, and leave it for 5 to 20 minutes.
4.
Spray the cleaning agent, and clean the surface with a cloth.
5.
Clean the surface again, and spray the developer.
6.
Leave the part for 15 to 20 minutes, and check visually whether there is a crack or not.
The cracked part gets the color.
7.
If there is a crack, repair it according to the repair procedure.
• Revolving frame
• Center frame
(a) Front side
(b) Right side
4-60
(c) Left side
MAINTENANCE