1956 AMC Hudson Technical Service Manual Supplement
1956 AMC Hudson Technical Service Manual Supplement
1956 AMC Hudson Technical Service Manual Supplement
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20<br />
ELECTRICAL SECTION<br />
The twelve-volt electrical system is outlined in the <strong>1956</strong> Series<br />
<strong>Technical</strong> <strong>Service</strong> <strong>Manual</strong> <strong>Supplement</strong>.<br />
Delco-Remy electrical unit maintenance and adjustment procedures<br />
are outlined in the <strong>1956</strong> "Rambler" Series <strong>Technical</strong> <strong>Service</strong><br />
<strong>Manual</strong>. Specifications follow.<br />
DISTRIBUTOR<br />
The distributor, Delco-Remy Model 1110863, (Fig. 1) is a 12-volt,<br />
8-cylinder unit.<br />
FIGURE 2—Distributor Vacuum Advance Breaker<br />
Plate Assembly<br />
FIGURE 1—Distributor Assembly<br />
A center bearing type of vacuum advance breaker plate assembly<br />
is used in this distributor. The vacuum advance breaker plate<br />
assembly consists of a movable breaker plate, a support plate, and<br />
a lubricating felt between the two plates. These parts are held<br />
together by means of retainer washers on a hub and bearing washer,<br />
spiral stabilizing spring, and retainer on the stabilizing spring post.<br />
The movable breaker plate is supported by three moulded buttons<br />
which ride on the support plate.<br />
A vacuum control unit is mounted on the outside of the distributor<br />
housing. The vacuum control unit consists of an enclosed springloaded<br />
diaphragm linked mechanically to the movable breaker<br />
plate inside the distributor. The airtight side of the diaphragm is<br />
connected to the intake manifold side of the carburetor. Under part<br />
throttle operation, the intake manifold vacuum is sufficient to actuate<br />
the diaphragm and cause the movable breaker plate to move,<br />
thus advancing the spark and increasing fuel economy. During<br />
acceleration or when the engine is pulling heavily, the vacuum is<br />
not sufficient to actuate the diaphragm and the movable<br />
breaker plate is held in the retarded position by a calibrated<br />
return spring which bears against the vacuum diaphragm.<br />
The centrifugal advance mechanism consists of an automatic<br />
cam actuated by two centrifugal weights controlled<br />
by springs. As the speed of the distributor shaft increases<br />
with engine speed, the weights are thrown outward against<br />
the pull of the springs. This advances the cam assembly and<br />
rotor to make ignition occur earlier in relation to piston<br />
position.<br />
If centrifugal advance mechanism requires attention,<br />
remove distributor cam, centrifugal advance weights, and<br />
springs from distributor weight base.<br />
Cleaning and Inspection<br />
When inspecting the distributor parts, keep in mind the<br />
results of the pre-disassembly test on the distributor tester<br />
as this will indicate certain parts which probably are defective.<br />
Before inspection, clean all parts in cleaning solvent<br />
except cap, rotor, condenser, breaker plate assembly and<br />
vacuum control unit. Degreasing compounds may damage<br />
insulation of the parts listed, or in the case of the breaker<br />
plate assembly, will saturate the felt between the plates and<br />
impair its lubricating ability.<br />
Servicing of Breaker Plate Assembly<br />
The movable breaker plate and support plate are not serviced<br />
separately. It is necessary to replace the breaker plate<br />
assembly if either part becomes seriously damaged or worn
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