PIAGGIO PORTER 1.3 16V 2008, Service Manual

Page: 104 / 892

2. Commutator eccentricity check
Hold the rotor by both sides on two V-shaped sup-
ports. Check the commutator eccentricity with a
dial gauge.
If the eccentricity exceeds the limits allowed, po-
sition the commutator on a lathe.
Characteristic
Eccentricity limit.
0.05 mm
3. Commutator diameter measurement
Measure the commutator diameter with a micro-
meter or a sliding gauge.
If the commutator diameter is shorter than the di-
ameter minimum, replace the rotor.
Characteristic
Standard diameter
28 mm
Minimum diameter
27 mm
4. Groove depth check. Measure the depth of in-
sulator grooves between the commutator seg-
ments
If the depth of insulator grooves is less than the
limit value, replace the commutator.
Characteristic
Minimum depth:
0.2 mm
KEY:
A = Grooves
B = Groove correction
C = Incorrect groove depth
D = Correct
E = Segment
Electrical system
PORTER 1.3 16V
ES - 104