Chevrolet 30 Series 1967 Service Manual page 372

ENGINE-ELECTRICAL 6Y-24
DISASSEMBLY
It is advisable to place the distributor in a distributor
testing machine or synchroscope prior to disassembly.
F ig . 12 i— L — 6 Distributor
1.
Breaker P la te Attaching
Screws
2. Condenser Attaching
Screws
Condenser
3.
4. Breaker P la te Assembly
4a. Cam Lubricator
5. Vacuum Control Assembly
6. Vacuum Control
A ttaching Screws
7. Housing
8. Cap
9.
10. C o ntact Point
A ttach ing Screw
11. Contact Point Assembly
12. W eigh t Cover
A ttaching Screws
13. W eigh t C o ver
14. W eight Springs
15. A d vance Weights
16. Cam Assembly
17. M a in Shaft
Assembly
18. Roll Pin
19. D rive G e a r
When mounting distributors for tests, first secure the
gear in the test drive mechanism, then push the distrib­
utor housing downward toward the gear to take up any end
play between the gear and the housing.
NOTE:
When testing distributors that have their
lower shaft support bushing located in the engine
block cylinder engines, a special adapter
( 6
should be used to insure the shaft will run true
in its housing.
Test the distributor for variation of spark, correct
centrifugal and vacuum advance and condition of contacts.
This test will give valuable information on distributor
condition and indicate parts replacement which may be
necessary. Check the area on the breaker plate just be­
neath the contact points. A smudgy line indicates that oil
or crankcase vapors have been present between the
points.
Four and Six Cylinder Engines
Refer to Figure 12i.
1. Remove the rotor.
2. Remove the vacuum control assembly retaining
screws, detach the unit from the distributor housing.
3. Disconnect the primary and condenser leads from
the contact point quick disconnect terminal, remove
the contact point set attaching screw, condenser at­
taching screw. Remove the point set and condenser
from the breaker plate.
4. Remove the breaker plate attaching screws, remove
the breaker plate from the distributor housing (fig.
i).
1 2
NOTE:
Do not disassemble breaker plate any
further.
5. Remove the roll pin retaining the driven gear to the
mainshaft, slide the gear from the shaft.
. Slide the cam and mainshaft from the distributor
6
housing.
7. Remove the weight cover and stop plate screws,
remove the cover, weight springs, weights and slide
cam assembly from the mainshaft.
V-8 Engines
Refer to Figure 13i and 14i.
1. Remove the rotor.
2. Remove both weight springs and advance weights.
3. Remove roll pin retaining driven gear to distributor
shaft, slide the gear and spacers from the shaft.
On heavy duty models remove shock mounting unit.
NOTE:
When servicing governor type distribu­
tors (fig. 14i), remove the cover band and
spinner valve assembly at this time. Be sure to
note the revolutions needed to remove the nut
from the spinner valve.
4. Before sliding the distributor shaft from the housing,
check for and remove any burrs on the shaft. This
will prevent damage to the seals and bushing still
positioned in the housing.
5. Slide the distributor mainshaft and cam-weight base
assembly from the housing.
. Remove vacuum advance
6
screws, remove the vacuum advance assembly.
mechanism retaining
CHEVROLET TRUCK SERVICE M ANUAL