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7
7.5
Section 7
Electrical System and Components
Rectifi er-Regulator
The recti
fi
er-regulator is mounted on the blower
housing. See Figure 7-5. To replace it, disconnect the
plug(s), remove the two mounting screws, and ground
wire or metal grounding strap.
NOTE: When installing the recti
fi
er-regulator, take
note of the terminal markings and install the
plug(s) accordingly.
Figure 7-6. Connecting Leads to Rectifi er-
Regulator.
4. Plug the tester into the proper AC outlet/power
supply for tester being used. Turn on the power
switch. The
POWER
light should be illuminated
and one of the four status lights may be lit as
well. See Figure 7-7. This
does not
represent the
condition of the part.
Figure 7-5. Rectifi er-Regulator.
Testing of the recti
fi
er-regulator may be performed
as follows, using the Recti
fi
er-Regulator Tester, (see
Section 2).
NOTE: Disconnect all electrical connections a
tt
ached
to the recti
fi
er-regulator. Testing may be
performed with the recti
fi
er-regulator
mounted or loose. The
fi
gures show the part
removed from the engine for clarity. Repeat
the applicable test procedure
two or three
times
to determine the condition of the part.
1. Connect the tester ground lead (with spring
clamp) to the body of the recti
fi
er-regulator.
2. Connect the red lead from the tester to the middle
terminal labeled B+.
3. Connect the two black leads from the tester to
both of the outer AC terminals on the recti
fi
er-
regulator. See Figure 7-6.
Rectifi er-
Regulator
Figure 7-7. Testing the Rectifi er-Regulator with a
Tester.
5. Press the
TEST
bu
tt
on until a
click
is heard and
then release. See Figure 7-7. Momentarily one of
the four status lights will illuminate indicating
the
partial condition
of the part.
a. If
the
OK
(green) light comes on the part is
good and may be used.
b. If any other light is displayed* the recti
fi
er-
regulator is faulty and should not be used.
*NOTE: A
fl
ashing
LOW
light can also occur as
a result of an inadequate ground lead
connection. Make certain the connection
location is clean and the clamp is secure.
Red
Lead
Black Leads
Ground
Lead
Power
Switch
Test
Button
Summary of Contents for Command PRO CH749
Page 1: ...SERVICE MANUAL ECH630 ECH749 HORIZONTAL CRANKSHAFT ...
Page 2: ......
Page 4: ......
Page 76: ...6 6 Section 6 Lubrication System ...
Page 94: ...7 18 Section 7 Electrical System and Components ...
Page 112: ...8 18 Section 8 Disassembly ...
Page 126: ...9 14 Section 9 Inspection and Reconditioning ...
Page 153: ......