RECTIFIER END FRAME BEARING. To
2. Position the alternator on the mount-
replace a rectifier end frame bearing,
ing
brackets and insert the bolts
proceed as follows (see Figure 10D-20 on
through the bolt holes in the mounting
bracket and end frame. Make sure that
the washers and nuts are in their proper
1. Pull inner race from shaft and bearing
locations.
from end frame.
3. Align the threaded hole in the adjust-
2. Assemble new inner race and bearing
ing lug of the drive end frame with the
as shown. Assemble bearing toward
slot in the adjusting strap.
Start the
drive end.
Press against seal end of
bolt, with the washers, through the slot
b e a r i n g to assemble into housing.
of the adjusting strap and into the
threaded hole in the end frame.
3. Use Delco-Remy lubricant No. 1948791
and fill reservoir half full. Arrange lu-
4. Place the drive belts in the groove of
bricant so a portion will touch bearing
the pulleys.
when assembled.
5. Adjust the belt tension so that a firm
push with the thumb at a point midway
between the two pulleys, will depress the
belt 1/2" to 3/4".
6. Check that alternator connection and
electrical leads are clean.
Install and
tighten lead to alternator.
THROTTLE SOLENOID (81Z18)
DESCRIPTION.
The throttle solenoid is
used to shut down the fuel supply to the
injectors when the ignition switch is in
the OFF position.
Figure 10D-20. Bearing Assembled
ELECTRICAL TESTS.
The DC throttle
B e t w e e n Shaft and Housing
solenoid has a stroke of 1", a pull cur-
rent of 20 amperes and a holding current
4. Reassemble the alternator in the re-
of 0.3 amperes.
verse of disassembly. Torque the shaft
nut to 70-80 ft-lbs.
Torque the output
PLUNGER BOTTOM TEST.
Connect a
t e r m i n a l bolt to 100-110 inch Ibs.
voltmeter or light (24 volt) between the
a u x i l i a r y a n d ( + ) t e r m i n a l s . When the
5. Magnetize the rotor as described in
solenoid is energized and the plunger
"Definitions" on page 10D-9.
bottoms, the voltmeter will indicate bat-
tery voltage or the light is on.
If not,
replace the solenoid.
Installation
VOLTAGE SUPPLY TEST. Connect a DC
To install the alternator, proceed as fol-
voltmeter across the solenoid terminals
lows:
and manually hold the plunger so that it
can not bottom.
Energize the solenoid
1. Install the drive pulley, if removed.
just long enough to obtain a voltmeter
reading, then connect the same voltmeter
Tighten pulley retaining nut to 50-60
across the power source and manually
ft-Ibs torque.
hold the plunger so that it cannot pull in
just long enough to obtain a voltmeter
NOTE
reading.
the difference between the two
voltmeter readings is the voltage re-
If the pulley was not removed,
duction due to wiring which should
check the retaining nut for proper
normally be less than 7% of rated voltage
torque.
(24 volts).
Electrical Components
