Disc Inspection - VESPA GTV 250 i.e. 2008 Service Station Manual

Vespa GTV 250 i.e.
Removal
- Remove the rear brake calliper.
- Remove the brake disc and the hub from the
wheel axle
- To remove the brake disc from the hub, hold the
unit firmly with a vice and operate on the 5 fixing
screws indicated in the photograph
Refitting
- To reassemble the brake disc on the hub, carry out the removal operations in the reverse order ar-
ranging the brake disc on the hub on the side opposite the wheel keying
- Follow the direction of rotation shown by the arrow and tighten to the prescribed torque.
- Fit the hub unit
- disc in the wheel axle
Locking torques (N*m)
Disk to the hub 11 - 13

Disc Inspection

- Remove the rear brake calliper.
- Check the disc thickness with a micrometer
Characteristic
Minimum thickness allowed after use:
3.5 mm
Standard thickness:
4 +0.2 -0.2 mm
- Repeat the measurement in at least 6 points on the disk.
- Check that the brake disc unit rotates smoothly using a special tool attached to the brake calliper
support as shown in the photo.
- In order to secure the appropriate tool adequately use a metal plate with M8 threaded hole and fix it
to one of the two rear brake calliper attachment points
- Fix the flange to the wheel axle using the original nut and spacer and an Æ 17mm bearing
N.B.
FOR A CORRECT READING, MAKE THE DRIVEN PULLEY AXLE ROTATE IN ORDER TO ROTATE
THE DISC.
Specific tooling
Braking system
BRAK SYS - 225