Brake Pump - PIAGGIO Ape Workshop Manual

APE TM Benzina
- That the hole of recovery and compensation (7) (visible in the section of the pump in the figure) that
communicates with the tank of the pump body, is not clogged or dirty.
It is advisable to carry out the cleaning of this hole with a jet of compressed air to apply, at reassembly,
the special pump components 2-4-5 and 6 positioning them as shown in detail in the figure.
To facilitate the operation, lubricate the surfaces of the rubber elements with grease; this must also be
done for the piston when fitting in the cylinder.
Once these parts are fitted, check that the pump works properly by pushing and quickly releasing the
piston into the cylinder: the piston should quickly go back to its rest position.
SHOW CONTROL CYLINDER
Once the shoe assembly has been removed from
the frame and the cylinder disassembled in all its
components, inspect following the same proce-
dure as per the brake pump, always bearing in
mind the warnings mentioned before regarding
rubber gaskets, the central spring, the wear level
of all parts as well as the cleaning procedure for
the different parts.
For this specific assembly, it also important to
make sure that the air bleed opening (screw "2")
and the oil intake hole are not clogged (blow in
compressed air through the holes). The max.
clearance between the metal pistons and the cyl-
inder must not exceed that specified in the special
section "Assembly clearances".
BRAKE CYLINDERS UNIT
KEY:
1. Brake cylinder body
2. Air bleeding screw
3. Pistons
4. Sealing ring

Brake pump

LOADING PUMP OIL
Once all the above checks have been completed, the pump (always on the vice) must be filled with
specific oil, as follows:
- Completely fill the reservoir (it must be kept in the same position as when it is mounted on the vehicle).
- Acting on the control rod, push two or three times the piston for a short stroke, to let the oil fill the pump
body.
Braking system
BS - 99