4C - 32 - CHARGING SYSTEM
90-816462 2-695
c. If reading is high or infinite (no meter move-
ment), high resistance or an open exists in the
field circuit. Check for poor connections be-
tween field winding leads and slip ring termi-
nals. If cause for open or high resistance can-
not be found, connect ohmmeter directly to
slip ring terminals. If correct reading is now
obtained, replace slip rings. If reading is still
high or infinite, replace complete rotor assem-
bly.
d. If reading is low, a short exists in the field cir-
cuit. Inspect slip rings to be sure that they are
not bent and touching outer slip ring. Also be
sure that excess solder is not shorting termi-
nals to aft slip ring. If cause for short cannot
be found, unsolder field winding leads from
slip ring terminals and connect ohmmeter di-
rectly to leads. If correct reading is now ob-
tained, slip rings are shorted and must be re-
placed. If reading is still low, rotor field
windings are shorted, and complete rotor as-
sembly must be replaced.
b
c
d
a
a - Field Winding Leads
b - Slip Rings
c - Rotor Shaft
d - Pole Pieces
73112
Stator
IMPORTANT: Stator leads MUST BE discon-
nected from rectifiers and diode-trio for this test.
!
CAUTION
Excessive heat from de-soldering may cause
damage to rectifiers or diode-trio assembly when
disconnecting leads.
1. Test stator for grounds, using an ohmmeter (set
on Rx1 scale) as follows:
a. Connect one lead of ohmmeter or test lamp to
one of the stator leads and the other lead to
stator frame. Be sure that lead makes good
contact with frame.
b. Meter should indicate no continuity (meter
should not move). If continuity does exist, sta-
tor is grounded and must be replaced.
73101
NOTE: It is necessary to test only three of the six
leads on EITHER side of the stator as the leads are
interconnected in the windings.
2. Test for opens in stator, using an ohmmeter (set
on Rx1 scale) as follows:
a. Connect ohmmeter or test lamp between
each pair of stator windings (3 different ways).
b. Continuity should be present in all three cases
(meter should move). If it does not, one or
more of the windings are open and stator
must be replaced.
Summary of Contents for 13
Page 1: ...13 Printed in U S A 90 816462 2 695 1995 Brunswick Corporation GM 4 Cylinder MARINE ENGINES ...
Page 2: ...90 816462 2 695 0 ...
Page 7: ...1 A IMPORTANT INFORMATION GENERAL INFORMATION 72000 ...
Page 15: ...1 B 50617 IMPORTANT INFORMATION MAINTENANCE ...
Page 36: ...1 C IMPORTANT INFORMATION TROUBLESHOOTING ...
Page 74: ...2 A 50633 REMOVAL AND INSTALLATION 4 CYL ALPHA ONE DRIVE ...
Page 88: ...3 A 26790 ENGINE 181 CID 3 0L 4 CYLINDER GM ENGINE ...
Page 137: ...4 A 72079 ELECTRICAL SYSTEMS STARTING SYSTEM ...
Page 170: ...4 B 71855 ELECTRICAL SYSTEMS IGNITION SYSTEM ...
Page 197: ...ELECTRICAL SYSTEMS CHARGING SYSTEM 4 C 72078 ...
Page 237: ...4 D 72747 ELECTRICAL SYSTEMS INSTRUMENTATION ...
Page 250: ...4 E 72938 ELECTRICAL SYSTEMS WIRING DIAGRAMS ...
Page 264: ...5 A FUEL SYSTEM FUEL PUMP ...
Page 271: ...5 B 72681 FUEL SYSTEM MERCARB 2 BARREL CARBURETOR ...
Page 300: ...6 A 50628 COOLING SYSTEM SEAWATER COOLED MODELS ...
Page 309: ...6 B 73665 COOLING SYSTEM CLOSED COOLING MODELS ...
Page 325: ...C 6 EXHAUST SYSTEM MANIFOLD ...
Page 331: ...7 A 71317 POWER STEERING PUMP ...