Vespa GTS Super 300 ie - Service manual > Rear/Front brake calliper
Rear brake calliper
- Removal
- Remove the rear wheel.
- Remove the pad retention pin snap ring.
- Using a pin partially remove the brake pad retention pin.
- Remove the screws fixing the brake calliper to the crankcase then remove the brake calliper complete with pipe.
- Complete the extraction of the pad retention pin, the spring and the pads.
N.B.
IF IT IS NECESSARY TO REPLACE OR SERVICE THE BRAKE CALLIPER, BEFORE REMOVING THE FITTINGS FIXING THE CALLIPER TO THE SUPPORT BRACKET, FIRST LOOSEN THE OIL HOSE FITTING AFTER HAVING EMPTIED THE SYSTEM OF THE CIRCUIT BEING EXAMINED.
Overhaul
- Remove the rear brake calliper.
- Suitably hold the brake calliper in a clamp
- Remove the two calliper coupling screws as shown in the photo
- Remove the two pistons from the calliper body with the aid of short blasts of compressed air through the brake fluid holes
- Remove the dust ring and the O-ring of each half calliper.
- Remove the O-rings in the half calliper.
N.B.
WHEN REMOVING THE O-RINGS, BE CAREFUL NOT TO SCRATCH THE HALF CALLIPER SEATS
- Check that the pistons and their seats show no scratches.
- Wash and blow all the components carefully
- Fit the O-rings and new dust guards
- Refit the pistons in their seats being careful to lubricate with brake fluid
- Re-couple the half callipers and lock the two screws at the specified torque
Locking torques (N*m)
Calliper coupling screw 30 ÷ 33 Nm
Refitting
- Follow the removal steps but in reverse order and tighten to the prescribed torque.
Locking torques (N*m)
Calliper fixing screw 24 ÷ 27
CAUTION
ONCE REFITTING IS FINISHED, BLEED THE SYSTEM.
CAUTION
ALWAYS USE NEW COPPER WASHERS.
Locking torques (N*m)
Screw fixing the oil connection to the calliper 19 ÷ 24
Front brake calliper
Removal
- Remove the front wheel
- Pre-loosen the two fixing pins of the brake pads
- Remove the two front brake calliper devices fastening them to the support as shown in the photograph.
N.B.
WHEN A PROCEDURE IS PLANNED INCLUDING THE SERVICE OR REPLACEMENT OF THE CALLIPER, FIRST LOOSEN THE FITTING CONNECTING THE PIPE TO THE BRAKE CALLIPER
Overhaul
Proceed as follows:
1) remove the two male hexagonal screws (1) and take out the two pads (10);
2) remove the two male hexagonal screws (2) and remove the reaction plate (3);
3) take out the fixed plate (4) from the guide;
4) remove the internal elements from the floating body (5) with the help of short blows of compressed air through the brake fluid pipe in order to facilitate the expulsion of pistons (6).
5) Check:
- that the plates and the body are whole and in good condition;
- that the cylinder and the floating body of the calliper do not show signs of scratches or erosion, otherwise replace the entire calliper;
- that the guides of the fixed plate are not scratched or eroded, otherwise replace the entire plate;
- that the brake pad check spring works properly.
CAUTION
ALL THE INTERNAL COMPONENTS MUST BE REPLACED EVERY TIME THE CALLIPER IS SERVICED.
The brake pad check spring
- pad fixing screws
- reaction plate fixing screws
- reaction plate
- fixed plate
- floating body
- piston
- piston sealing rings
- guide protection rubbers
- brake pad check spring
- pads
Refitting
Insert the following on the front brake body:
- The sealing rings and the pistons (1).
- Refit the plate (2).
- Arrange the pad holding clamp (3).
- Refit the pads and bleed air.
- Place the calliper on the disk and lock it to the support by tightening the bolts at the prescribed torque.
- Lock the pipe joint to the calliper at the prescribed torque.
CAUTION
ALWAYS USE NEW COPPER WASHERS.
Locking torques (N*m)
Screws fixing the front calliper to the support: 24 ÷ 27 Screw fixing
the oil connection to the calliper 19 ÷ 24
See also:
Vespa GTS Super 300 ie - Service manual > Rear/Front brake disc
Rear brake disc 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