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8-44
IGNITION SYSTEM
position of the rotor as reference when reinstalling
the distributor.
(5)
Remove the distributor hold-down arm screw.
(6)
Carefully lift the distributor from the engine,
the shaft
will
rotate slightly as the distributor gear
is disengaged from the camshaft gear.
Shaft und Bushing Wear Test
(1)
Remove the distributor rotor.
(2)
Disconnect the primary lead wire at the dis-
tributor terminal.
Do not loosen
the removable con-
tact arm spring retaining nut.
(3)
Clamp the distributor hold-down arm in a vise
equipped with soft jaws and apply only enough pres-
sure to restrict any movement of the distributor
during this test.
-CAP
CONTACT SET
BREAKER PLATE
C A M
~ - 4 , I
GOVERNOR WEIGHT
SHAFT
PLATE
(4)
Attach a dial indicator to the distributor hous-
ing so that the indicator plunger arm rests against
the movable arm at the rubbing block and with the
rubbing block of the movable contact arm on the
highest point of a cam lobe (Fig.
1).
(5)
Place one end of a wire loop around the top of
the distributor shaft. Hook a spring scale in the other
end of the wire loop and pull on a line with the plung-
er of the indicator gauge. The wire loop must be
down on the distributor shaft to insure a straight pull
also be sure that the wire loop does not interfere
with the indicator or indicator holding bracket. Apply
a five pound pull and read the movement of the plung-
er on the indicator dial. (Be sure the rubbing block
of the movable contact arm
is
on the highest point of
the cam lobe during this test.) If the plunger move-
ment exceeds .006 inch, replace the bushings and/or
distributor shaft, see "Distributor Disassembly."
DISASSEMBLY OF THE
DISTRIBUTOR (Fig. 2)
(1)
Remove the distributor rotor.
(2)
Remove the two screws and lockwashers attach-
ing the vacuum control unit to the distributor hous-
ing and remove the vacuum control unit.
(3) Remove the primary lead terminal at the ter-
minal screw and slide the primary lead off the breaker
plate terminal. Remove wire and grommet as an as-
sembly. (Push the grommet towards the inside of dis-
tributor to remove-Do
not pull the wire.)
(4)
Remove the two screws and lockwashers at-
taching the contact plate to the housing and lift out
the contact plate, contacts and condenser as an
assembly.
The distributor cap clamp springs are held in place
by
peened metal around the openings and should
not
be
removed.
Fig. 2-Distributor
Disassembled V i e w
ITypical)
Fig. 3-Removing
or
Installing Distributor
Cam Felt ITypical)
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