Vespa GTS Super 300 ie - Service manual > Inspecting the clutch spring

• Measure the length of the spring when it is relaxed.

Characteristic

Standard length
123 mm
Acceptable limit after use:
118 mm

Refitting the clutch

• Support the driven pulley spring compressor specific tool with the control screw in vertical axis.
• Arrange the tool with the medium length pins screwed in position "C" on the inside.
• Introduce the adapter ring No. 11 with the chamfering facing upwards.
• Insert the clutch on the adapter ring.
• Lubricate the end of the spring that abuts against the torque server closing collar.
• Insert the spring with its plastic holder in contact with the clutch.
• Insert the drive belt into the pulley unit according 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 fixing nut and tighten it to the prescribed torque using the special 46x55 wrench.
• Loosen the tool clamp and insert the belt according to its direction of rotation.

• Lock the driven pulley again using the specific tool.
• Preload the clutch return spring with a traction/ rotation combined action and place the belt in the smaller diameter rolling position.
• Remove the driven pulley /belt unit from the tool.

N.B.

DURING THE SPRING PRELOADING PHASE, BE CAREFUL NOT TO DAMAGE THE PLASTIC SPRING STOP AND THE BUSHING THREADING.

N.B.

FOR DESIGN REASONS, THE NUT IS SLIGHTLY ASYMMETRIC; THE FLATTEST SURFACE SHOULD BE MOUNTED IN CONTACT WITH THE CLUTCH.

Specific tooling
  020444Y Tool for fitting/ removing the driven pulley clutch
  020444Y011 adapter ring
  020444Y009 wrench 46 x 55

Locking torques (N*m)
Clutch unit nut on driven pulley 45 ÷ 50

Refitting the driven pulley

• Refit the clutch bell.

See also: