VESPA 664787 Service Station Manual page 123

Vespa S 50 2T
when it is fully empty, the level of fluid in the res-
ervoir is below the MIN level.
N.B.
THE LEVEL TENDS TO DROP AS THE BRAKE PADS GET
WORN, A MINIMUM LEVEL SHOULD NOT BE REACHED.
IF THE LEVEL IS TOO LOW, CHECK AND FIX THE SYSTEM
SEALS, IF REQUIRED. TOP UP THE PUMP TANK, IF RE-
QUIRED, CONSIDERING THAT THE "MAX." LEVEL MUST
ONLY BE OBTAINED WITH NEW PADS.
- Under standard climatic conditions, replace fluid as indicated in the scheduled maintenance table.
Front brake pump
Removal
- Remove the front and rear handlebar covers
- Remove the two screws fixing the brake pump to
the handlebar indicated in the photograph
- Remove the oil pipe joint from the pump
- Remove the connector to the stop light switch
Overhaul
Proceed as follows:
1) Remove the brake lever by loosening the retaining screw; open the cover (2) and take out the dia-
phragm (3);
2) remove the cap (4) and take out the internal parts in order;
3) Check that:
- The body of the pump shows no signs of internal damage or corrosion;
- The plunger shows no sign of damage or abnormal wear;
- The plunger return spring is in good condition.
Braking system
BRAK SYS - 123