Removal And Disassembly Of Distributor - Cadillac 54-6219 1954 Shop Manual

11-7
ENGINE ELECTRICAL
Vacuum Advance
Vacuum-Inches of
Distributor Engine
Mercury
Degrees Degrees
6-1/2
0
10
1-1/2
-
4-1/2
12
5-1/2
-
8-3/4
14
9
-
12-1/4
16
11-3/9
-
14-1/2
17 Mm. 13
2, Disconnect vacuum pipe at vacuum control,
Fig, 11-8.
3. Disconnect primary lead at distributor.
0 4. Turo the engine to top dead center for number
3-9 one cylinder "C" on harmonic balancer.The rotor
11-17 will now point to number one insert in distributor
cap, toward rear of engine. 18-24
24-29
Mm. 26
The 1954 series distributor advance mechanism
is designed to give maximum fuel economy and
performance. The effect of this design is repre
sented in the above chart. Fig. 11-7.
If tests indicate an improperlyoperating advance
mechanism, disassemble the distributor, as out
lined in Note No. 12, and repair or replace worn
or defective parts
-
Reassemble distributor, as outlined in Note No,
13, and measure the contact arm spring pressure.
This spring pressure should be 19-23 oz.To adjust
spring tension, bend spring until required tension
is obtained. Adjust contact points, as outlined in
Note lOb, The gap measurement should be .016".
12 Removal and Disassembly
of Distributor
a. Removal
1. Remove distributor cap from distributor.
5. Remove distributor hold down nut and clamp.
6. Lift the distributor out of the engine.
NOTE: The distributor rotor will turn slightly
as the drive gear becomes disengaged from the
teeth of the camshaft gear. Scribe a line on the
edge of the distributor cup, directly below the
tip of the rotor. This will assure proper en
gagement of drive gear teeth with camshaft teeth
to retain correct timing when reinstalling dis
tributor.
b. Disassembly
1. Remove rotor from end of distributor shaft.
Fig. 11-8.
2. Remove ground wire screw at breaker plate,
and two screws holding vacuum advance to dis
tributor housing, and remove vacuum advance me
chanism.
3. Remove primary
insulator from housing.
4. Remove
to distributor
three screws holding breaker plate
housing.
14
13
12
11
10
9
C,,
0
.aJ
C
0
I
C,,
C
Ui
L
z
'C
>
C
LI
'C
0
6 8 10 12 14 16 18 20 2224 26 28 30 32 34 363840
ENGINE RPM IN HUNDREDS
6 8 10 12 14 16 18 20 024
VACUUM-INCHES OF MERCURY
Fig. 11-7 Distributor Advance Curves