Hudson 1955 Rambler, Техническое и сервисное руководство

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30
T E C H N I C A L S E R V I C E M A N U A L
performance while, if the tension is too
strong, excessive wear of the cam and breaker
arm rubbing block will result.
Governor Adjustment
Mount the distributor on a test fixture that
will show the distributor R.P.M. and degrees
of advance. Operate the distributor in the
correct rotation and increase the speed until
the spark begins to advance. Reduce the speed
slightly and set the indicator to zero.
Increase the speed to the value specified to
give 1° advance. If the advance is not 1°, stop
the distributor and bend the outer spring lug
on the weak weight spring to change its tension.
Check this point again; then operate the
distributor at the specified speed to give an
advance 1° below the maximum. If this advance
is not as specified, stop the distributor and
bend the outer spring lug on which the heavy
spring is mounted. Recheck the zero point and
the above two points and make whatever
readjustments are necessary; then check the
advance at all of the points specified. When
making this check, operate the distributor
both up and down the speed range. If there is
a variation between the readings for increas-
ing and decreasing speeds, it indicates that
the governor action is sluggish and requires
overhaul.
Vacuum Advance Adjustment
Vacuum advance should be checked on a distrib-
utor test fixture that has a controlled source
of vacuum and a vacuum gauge. Mount the
distributor on the fixture and connect the
vacuum line. Tighten the vacuum connections
thoroughly, being careful not to apply a
torque to the vacuum housing as this could
cause leakage where diaphragm is clamped in
the housing. Turn on the vacuum pump to give
a reading of 10" to 20" vacuum; then shut off
the pump. If the gauge reading falls, it
indicates leakage in the vacuum chamber, pump,
gauge, or connections which should be located
and corrected before tests and adjustments are
made.
Remove all vacuum from the distributor and
operate it at a speed above the maximum
governor advance speed to eliminate all spark
variations due to the governor. Set the
indicator to zero and apply vacuum to give one
of the advance figures specified. If the
advance is incorrect, change the spacing
washers between the vacuum chamber spring and
nut. Be sure to tighten the nut thoroughly and
have gasket in place. When one point of the
curve is adjusted, the others should be
checked. If they are not within limits, it
indicates either incorrect spring characteris-
tics or leakage in the vacuum chamber and lines.
The maximum advance is controlled by a stop
on the vacuum chamber arm. If the maximum
advance is not correct, make sure the parts
are correctly assembled and have not had an
incorrect part installed.
Distributor Assembly
NOTE: After the distributor has been
reassembled, all of the points men-
tioned in the following lubrication
section should be checked.
BE SURE THAT THE DISTRIBUTOR CONTACTS ARE
CLEAN AND DRY. If any grease or oil is on the
contacts, they should be cleaned with refined
carbon tetrachloride. Remove any residue by
pulling a piece of clean dry tape between the
contacts.
The breaker contacts should be adjusted to
the correct gap.
Lubrication
Distributor should be lubricated periodically
at the following points: Apply 3 to 5 drops
of medium engine oil to the oiler on the side
of the distributor base at regular chassis
lubrication periods.
After the first 2500 miles, remove the cap
and rotor and apply 5 drops of medium engine
oil to the felt in the top of the cam. Repeat
this lubrication at 5000 miles and every
10,000 miles thereafter.
At 10,000 mile intervals, apply one drop of
light oil to the breaker arm pivot pin.
Operate arm once or twice; then remove the
excess oil. Apply a light film of grease to
the breaker cam.
At overhaul, soak drive shaft bearings in
medium engine oil and drain before reassem-
bling the distributor. Wipe all oil from upper
part of base. At assembly apply a film of
grease to the upper drive shaft washer and put
a small amount of grease in the bearing bore
just above the bearing. Lubricate the governor
mechanism sparingly with medium engine oil.
Place one drop of light oil on each of the
breaker plate support hearings and on the
pivot bearing.
On Models IAT-4203-A and IAT-4202, press on
pivot retainer spring to expose a slight gap
between the spring and the washer. Apply one
drop of light oil under the washer.
DISTRIBUTOR (DELCO-REMY)
"Rambler" Series
The "Rambler" Series distributor, Delco-Remy
Model 1112382, is a six volt, six cylinder,
full automatic unit with centrifugal advance
of 24 engine degrees. The shaft revolves in a
special porous bushing which spans an oil
reservoir in the distributor housing (Fig.
30).
Spark Control
Advancing and retarding of the spark for
varying conditions of speed and load is
accomplished by a centrifugal advance mecha-
nism (governor weights) on the distributor
shaft which advances the contact breaker cam
and a vacuum control mechanism which, actuated
by the manifold vacuum, rotates the distribu-
tor in its mounting.