Chevrolet Light Duty Truck 1973, Руководство по обслуживанию

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6 Y -5 8 ENGINE ELECTRICAL
terminal of solenoid switch, and connect positive
lead to battery terminal of switch (Fig. 15s).
7. Turn ignition switch on and crank engine.
Immediately turn voltmeter switch to low scale and
take reading as quickly as possible, then turn switch
back to higher scale and stop engine.
The voltmeter will read not more than 2/10 volt if switch
contacts are satisfactory. If voltmeter reads more than
2/10 volt, switch should be repaired or replaced.
AMPERAGE TEST OF SOLENOID
SWITCH WINDINGS
(1) Current draw of both windings in parallel.
(2) Current draw of hold-in winding alone.
1. Remove screw from solenoid motor terminal and
bend field leads slightly until clear of terminal.
Then ground solenoid motor terminal with a heavy
jumper wire (Fig. 16s).
2. Connect a 12-volt battery, a variable resistance, and
an ammeter of 100 amperes capacity in series with
solenoid "S" terminal. Connect a heavy jumper
wire from solenoid base to ground post of battery.
Fig. 1 5 s — S o len o id S w itch C o n ta c t T e s t C o n n e c tio n s
3. Connect a voltmeter between base of solenoid and
small solenoid "S" terminal.
4. Slowly adjust resistance until voltmeter reads 10
volts and note ammeter reading. This shows current
draw of both windings in parallel. Refer to Delco-
Remy bulletin for specifications on the starter being
tested.
5. Remove jumper wire from solenoid motor terminal
and re-adjust resistance until voltmeter reads 10
volts, then note ammeter reading. This shows
current draw of hold-in winding alone. Refer to
Delco-Remy bulletin for specifications.
6. If solenoid windings do not test within specifica­
tions given, solenoid switch assembly should be
replaced.
CHECKING PINION CLEARANCE
Whenever the starter motor is disassembled and
reassembled, the pinion clearance should be checked.
This is to make sure that proper clearance exists between
the pinion and pinion stop retainer when pinion is in
cranking position. Lack of clearance would prevent
solenoid starter switch from closing properly; too much
clearance would cause improper pinion engagement in
ring gear.
1. Connect a source of approximately 6 volts (3
battery cells or a 6 volt battery) between the
solenoid "S" terminal and ground.
CAU TIO N:
Do not use more than 6 volts or the
motor will operate. As a further precaution to
prevent motoring, connect a heavy jumper wire
from the solenoid motor terminal to ground.
2. After energizing the solenoid, push the pinion away
from the stop retainer as far as possible and use
Fig. 17s—Checking Pinion Clearance
LIGHT DUTY TRUCK SERVICE MANUAL