VESPA GTV 125, Service Station Manual

Page: 109 / 278

Inspecting the clutch spring
- Measure the length of the movable driven half-
pulley spring while it is unloaded.
Characteristic
Standard length
106 mm
acceptable limit after use:
101 mm
Refitting the clutch
- Support the driven pulley spring compressor ap-
propriate tool with the control screw in vertical axis.
- Arrange the tool with the medium length pins
screwed in position « F » on the inside.
- Insert the adapter ring 8 in the pins.
- Preassemble the cooling fan to the clutch in such
a way that the keying facets are aligned and the 3
pin heads (A) of the mass axis can be seen in full.
- Insert the clutch on the adapter ring.
- Lubricate the end of the spring that abuts against
the servo-system closing collar.
- Insert the spring with its plastic holder in contact
with the clutch.
- Insert the driving belt into the pulley unit accord-
ing to their direction of rotation.
- Insert the pulley unit with the belt into the tool.
- Slightly preload the spring.
- Make sure that the clutch is perfectly inserted into
the adapter ring before proceeding to tighten the
clutch nut.
- Place the tool in the clamp with the control screw
on the horizontal axis.
- Fully preload the spring.
- Apply the clutch lock nut and tighten it to the
specified torque using the specific 46x55 spanner.
Vespa GTV 125
Engine
ENG - 11