DCE80-100E
Technical Handbook
Steering axle
Service
10
P.Group 60
TDCE01
04GB
Safety test when changing tyres
The test is intended for detecting cracks in wheels. Cracks can
lead to safety risks if they are not detected and remedied.
Potential cracks that cause air leakage are not detected in the
test described here.
The test is carried out in two steps
1. Magnetic examination, which quickly indicates the crack.
2. The actual crack is then tested with penetrance.
Magnetic examination
1. Dismantle the loose componentes of the wheel
2. Clean area A on the the wheel totally for paint residue by us-
ing shot blasting.
3. Carry out magnetic examination by using e.g.:
Equipment: Yoke Tiede
Technique: a. Electricity AC
b. Contrast paint
Test medium: a. Wet
b. colour (E-G- Tiede ferrolux)
4. If no cracks are indicated in the magnetic examination, the
test is completed and the wheel approved. In case cracks
are indicated, carry out the penetrance test.
Penetrance test
1. Clean area B with cleaning fluid, part.no. 923626.0668.
2. Spray penetrance on the cleaned area and let the sprayed
area dry for approximately 10 minutes
Penetrance: Part no. 923626.0669
3. Clean off the penetrance by using cleaning fluid (Part.no.
923626.0668). All excessive penetrance should be re-
moved.
4. Wipe off the cleaning fluid with a cloth, the remaining pene-
trance must evaporate.
5. Spray developer on the area B.
Developer: Part.no 923626.0670
6. Let the sprayed area dry for 1-2 hours.
7. Inspect the lock ring groove visually.
8. If the marked area B shows no linear or dot shaped cracks
the wheel is approved.
9. If the marked area B shows linear or dot shaped cracks, the
wheel must be rejected.
C = Linear split or crack
D = Dot shaped crack
A
B
C
D
C = Linear split or crack
D = Dot shaped crack
To Next Page
Loading...
