D439E Service Manual 3. Engine Electrical System (D439E)
139
Inspection
Rotor Inspection
1. Check for continuity between slip rings (1).
Replace tile rotor If there is no continuity.
2. Check for the continuity between slip ring (1) and
rotor (2) and between slip ring (1) and shaft (3).
Replace the rotor If there is continuity each other.
Stator Inspection
1. Check for continuity between lead wires (1).
Replace tile stator if there is no continuity.
2. Check for continuity between lead wire (1) and
call core (2) Replace the stator if there is
continuity
Brush Inspection
1. Replace the brush If It is worn exceeding to the
limit (A).
2. Unsolder the lead wire of the brush to separate
the brush and spring. When assembling new parts,
push the lead wire and solder it so that it fits in the
brush holder.
Regulator Inspection
1. When continuity is tested between (+) regulator
and stator call lead connector rheostat must show
that the electric current flows In one way If the
electric current flows In both ways replace the
regulator assembly because It means that the
diode is short.
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