Vespa GTS Super 300 ie - Service manual > Front brake pump

Removal

Braking System

Overhaul

Proceed as follows:

1) Remove the brake lever by loosening the retaining screw; open the cover (2) and take out the diaphragm (3);

2) remove the cap (4) and take out the internal parts in order;

3) Check that:

CAUTION

ALL THE SEALS AND GASKETS MUST BE REPLACED EVERY TIME THE PUMP IS SERVICED.

Braking System

  1. Reservoir cap screw
  2. Reservoir cap.
  3. Diaphragm.
  4. Bellows.
  5. Sealing ring
  6. Piston.
  7. Gasket.
  8. Spring.
  9. Tank

Refitting

To refit, carry out the removal operations but in reverse order, observing the specified torques.

Locking torques (N*m)
Oil pipe joint to the pump: 20 - 25 Brake pump fixing screws to the handlebar: 7 to 10 Nm

See also:

 Vespa GTS Super 300 ie - Service manual > Fill

Rear - combined Remove the rubber cap from the bleed screw. Insert a rubber pipe in the bleed screw to permit the brake fluid to be recovered. With the left-had brake lever, load the system and bring it up to the required pressure. Keeping the left-hand brake lever pulled, loosen the bleed screw to permit the air in the system to escape. Then tighten the bleed screw Repeat the operation until only brake fluid comes out of the rubber pipe. Remove the fluid recovery pipe and refit the rubber cap over the bleed screw. Top up the brake fluid to the right level in the reservoir.

 Vespa GTS Super 300 ie - Service manual > Cooling System

Circuit diagram

Maxi Scooters: