- Move the belt downwards.
- Suitable support the roller contrast and extract
the movable driving half-pulley with the relevant
bushing and the rear washer, being careful not to
make the rollers come out.
Inspecting the rollers case
- Check that the inside bushings shown in the figure exhibit no signs of abnormal wear and measure
the inside diameter.
CAUTION
DO NOT LUBRICATE OR CLEAN THE BUSHINGS
Characteristic
Maximum admissible diameter:
30.12 mm
Standard diameter:
30.021 mm
- Measure the pulley sliding bushing outside di-
ameter shown in the figure.
Characteristic
Minimum admissible diameter
Ø 29.95 mm
Standard diameter:
Ø 29.959 mm
- Check that the rollers are not damaged or worn.
Characteristic
Minimum admissible diameter
Ø 24.5 mm
Standard diameter:
Ø 24.9 mm
Engine MP3 500 i.e. SPORT Business_LT_ ABS-ASR_EU_USA (2015)
ENG - 156