Vacuum Advance Mechanism Removal; Vacuum Advance Mechanism Installation - Jeep 1987 Wrangler Workshop Manual

ELECTRICAL
IGNITION SYSTEM - MOTORCRAFT (6-Cyl. Engine)
Position the pickup coil assembly into the
distributor housing.
Ensure the pin on the pickup coil assembly fits
into the hole in the vacuum advance mechanism
link.
Install the washers and retainer onto the pivot
pin to secure the pickup coil assembly to the
base plate.
Position the wiring harness in the slot in the
distributor housing. Install the two pickup coil
plate screws and tighten.
Install the trigger wheel on the shaft with hand
pressure. The long portion of the teeth must be
up. When the trigger wheel and slot in the shaft
are properly aligned, use a suitable drift and
small hammer to tap the pin into the locating
groove in the trigger wheel and shaft.
If the distributor is not installed in the engine,
support the shaft while installing the trigger
wheel pin.
Install the rotor. Install the distributor cap.
Wacuum Advance
Mechanism
Removal
Remove the vacuum hose from the vacuum
advance mechanism.
protruding through the distributor housing. It
may be necessary to loosen the base plate
screws for necessary clearance.
Vacuum
Advance
Mechanism Installation
If a replacement vacuum advance mechanism is
to be installed, calibrate using the following
procedure.
Insert an Allen wrench into the vacuum hose
tube of the o r i g i n a l v a c u u m a d v a n c e
mechanism. Count the number of clockwise
turns necessary to bottom the adjusting screw.
Turn the adjusting screw of the replacement
vacuum advance mechanism clockwise to the
bottom. Turn it counterclockwise the same
number of turns counted earlier.
Install the vacuum advance mechanism on the
distributor housing. Ensure that the link is
engaged on the pin of the pickup coil. Install the
retaining screws. Tighten the base plate screws,
if loosened.
Check the ignition timing and adjust, if required.
Connect the vacuum hose to the vacuum
advance mechanism.
Remove the attaching screws and remove the
v a c u u m a d v a n c e m e c h a n i s m from the
distributor housing. It is necessary to tilt the unit
to disengage the link from the pickup coil pin
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