Shibaura ST318, Workshop Manual

Page: 69 / 247

68
4) INSPECTION AND REPAIR FOR
EACH COMPONENT
(1) Pulley
Check for fan belt slippage.
(2) Fan
Check for deformation.
(3) Ball Bearing
Rotate it by hand and check for resistance or noise in
movement.
(4) Stater
● Resistance between each phase (between each end
of the lead wire and neutral point) shall be less than
1
Ω .
● Insulation resistance between the core and coil shall
be more than 0.1 M Ω when measured with a 500 V
megger.
NOTE: When there is no continuity, check the lead
wire connection since stater coil
disconnection is not likely.
(5) Rotor
● Resistance between slip rings.
Example: approx. 2.9 Ω
● Check for stains or roughness of the surface. Fine
sand-paper (#300 to #500) should be used to
remove these. A slip ring is usable until its outer
diameter wear reaches 0.4 mm.
T185
Ball Bearing Inspection
T186
T187
Resistance between Slip Rings
T188