Starting System - GMC 1976 ZEO 6083 Maintenance Manual

24C- 30 ONAN MOTOR GENERATOR
2. Be sure output control plug (connector) is
properly inserted into stator receptacle to eliminate
any resistance due to a poor connection . Keep it
clean and tight.
TESTING MOTOR GENERATOR
CHARGING SYSTEM
The starter consists of two parts: a low voltage
compound DC motor and a means of transmitting
motor power to the flywheel ring gear. The construc
tional difference'between this type of starter and oth-
ers is that the lever spring (figure 45) is located in the
central portion of the front bracket. The shift lever,
which is operated by solenoid, causes the overrun-
ning clutch assembly to move along the armature
shaft toward the flywheel . As the pinion and fly-
wheel teeth make contact, the shift lever continues to
move and make electrical contact to spin the arma-
3. Check conditio
nections are clean
at
STARTING SYSTEM
;of battery. Be sure cable con-
tight.
NOTE:
Charging system tests require a fully
charged battery.
ture . The lever spring compresses, holding the pinion
gear against the flywheel gear . As soon as the arma-
ture rotates and the gear teeth line up, the gears will
mesh .
STARTER REMOVAL
1. Disconnect the ground cables at (-) terminals
of both automotive and living area batteries.
Basic Test Procedure Test Values
1 . Battery Battery Voltage - unit 12 to 12 .8 VDC
not running.
2 . Regulator Battery Voltage after 13 .6 to 14 .7 VDC
unit is running 3 to 5
minutes.
3 . Alternator Stator Ohmmeter reading from .2 to .6 Ohms
and Wiring with Fully stator output - unit not
Charged battery .
running. Disconnect wire
terminating at AC termi-
nal of voltage regulator
and wire terminating at
BAT terminal of start
solenoid . Insert ohm-
meter between these
wires.
4. Alternator Stator Measure AC stator output 25 .2 to 30.8 VAC
and Wiring . voltage with unit run-
ning . Disconnect wire
terminating at AC termi-
nal of voltage regulator.
Measure AC voltage (unit
running) between this
wire and BAT terminal of
start solenoid .