Vespa GTS Super 300 ie - Service manual > Swing-arm

Removal

• Place the vehicle on its centre stand;
• Remove the engine housing
• Remove the swinging arm/engine fitting shown in the picture
• Move the engine back

• Remove the spring anchoring the swinging arm to the chassis as shown in the picture

• Remove the two screws fixing the buffer support bracket to the chassis

• Remove the left and right caps located under the footrest to reach the pin fixing the swinging arm to the body.
• Remove the pin. Then remove the swinging arm.

• Check the entire swinging arm assembly.
• Check all the centring bushing components and silent block rubber buffers.
• Replace the work components that cause excessive clearance on the rear suspension.

Overhaul

• Check there is no sticking in the movement of the connection of the swinging arm on the engine side to the swinging arm on the chassis side.
• Check the axial clearance between the two swinging arms using a feeler gauge

Characteristic

Standard clearance
0.40 - 0.60 mm
Allowable limit after use:
1.5 mm

• In order to check the clearance of the swinging arm on the frame side, prepare a retainer using the fixing pin of the swinging arm on the frame and two rings from the special tool 020229Y. Alternatively, use two washers with 12-mm inside diameter for pins, minimum 30-mm outside diameter and 4-mm thick at least.

• Check there is no sticking in the rotation.
• Check the axial clearance of the swinging arm on the chassis side

Characteristic

Standard clearance
0.40 - 0.60 mm
Allowable limit after use:
1.5 mm

• Separate the swinging arm on the engine side from the vehicle side arm.
• Remove the plastic bushings and the internal spacer shown in the picture.

• Using a suitable pin remove the roller casings as shown in the pictures

• Using an appropriate tool plant new roller casings, being careful to position the bearings with the seal rings facing outwards

Specific tooling
020244Y 15-mm diameter punch
020115Y Ø 18 punch

Characteristic

Length of the swinging arm tube on the engine side:
L 175.3 + 0.3 0
Length of the internal swinging arm spacer on the engine side:
L 183 + 0.3 0
Engine side swinging arm plastic bushing shim:
3.5 +- 0.05 mm
Chassis side swinging arm plastic bushing shim:
3.5 +- 0.05 mm
Length of the internal swinging arm spacer on the frame side:
290 +- 0.1 mm
Length of the swinging arm tube on the chassis side:
283 +- 0.1 mm

• Lubricate roller casings and the plastic bushings with grease
• Insert the spacers
• Assemble the two arms with the relative bolt in the position shown in the picture
• Adjust the bolt as shown in the picture
• Position the chassis side swinging arm with the most protruding part pointing towards the silent block side as shown in the picture

Recommended products

AGIP GREASE PV2 Ivory smooth-textured, slightly-stringy anhydrous calcium-base grease.

TL 9150 066, NATO G 460 symbol

• Make sure the silent bloc is not broken. If it is, replace the coupling.
• Remove the Seeger ring shown in the picture

• Remove the full silent bloc bracket
• Undo the silent bloc ring shown in the picture

• Hold the full silent bloc bracket in the clamp
• Using the appropriate tool, remove the silent bloc from the bracket from the side corresponding to the inside of the vehicle. This is to guarantee the tool is centred properly on the support

• Install a new silent bloc, making sure it aligns properly with the reference tooth.
• Fit the silent blocs, making sure the chamfered part of the silent bloc matches the chamfered part of the bracket

• Using the appropriate tool, fit the silent bloc as shown in the picture

Refitting

• To refit, perform the removal operations in reverse.
• Grease the bearings and the rolling parts with the recommended grease.
• Complete the fitting by tightening the nuts on the relative bolts to the proper tightening torque.

Locking torques (N*m)
Engine- and vehicle-side swinging arm junction bolt 40 ÷ 45 Swinging arm pin - Engine 64 ÷ 72 Body shell - Swinging arm pin 76 ÷ 83 Screw fixing the silent-block support plate to the body 42 ÷ 52

See also: