1948-1952 Shop Service Manual - - Hudson-Essex-Terraplane Club
1948-1952 Shop Service Manual - - Hudson-Essex-Terraplane Club
1948-1952 Shop Service Manual - - Hudson-Essex-Terraplane Club
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ENGINE TUNE-UP 2 -17<br />
2. Connect a starter battery tester directly across the battery<br />
and set load to 50 amperes, or use the equivalent in seal<br />
beam lamps.<br />
3. Run engine to approximately 2000 R.P.M. amperage<br />
reading should be 36 amperes. If it is not within a tolerance<br />
of one to two amperes of this reading, the regulator<br />
should be removed and taken to an authorized Auto-Lite<br />
dealer for replacement.<br />
NOTE: If car is out of warranty, remove the voltage cover<br />
and adjust the current regulator spring hanger to the necessary<br />
36 ampere output. To prevent operation of the v o<br />
It a g e regulator unit while making this adjustment, place<br />
a jumper across the voltage regulator points. For final<br />
checking, the regulator cover must be in place on regulator.<br />
CAUTION: Momentarily touch the negative battery cable<br />
to battery negative post to determine that there is no<br />
sparking between the battery negative post and cable terminal,<br />
then connect negative cable.<br />
CURRENT REGULATOR ADJUSTMENT:<br />
1. To adjust operating amperage, remove cover and<br />
change armature spring tension by bending the lower<br />
spring hanger. Increasing tension raises the operating<br />
amperage; decreasing the tension lowers it.<br />
2. Replace cover and re-check. Stop engine and re-start after<br />
each adjustment. Take readings with cover in place.<br />
FUEL PUMP TEST:<br />
FUEL PUMP<br />
The fuel pump should be tested to make certain that it will<br />
draw an adequate supply of fuel from the tank and deliver<br />
the fuel to the carburetor at a constant pressure under the<br />
varying conditions of fuel consumption and engine speed.<br />
1. Remove and clean the fuel pump sediment bowl and<br />
screen.<br />
2. Replace the screen if damaged.<br />
NOTE: If the combination fuel and vacuum pump is used,<br />
remove and clean the air filter screen located under the<br />
cover at the top of the pump.<br />
3. Make sure all connections and cover screws are tight after<br />
replacement.<br />
FIGURE 27<br />
4. Disconnect the fuel line at the carburetor and connect the<br />
fuel pump gauge, Figure 27.<br />
5. Start the engine and run at 1800 R.P.M. Normal pressure<br />
should be 3 to 4 pounds with AC combination fuel and<br />
vacuum pump and 3-1/2 to 4-1/2 pounds with Carter<br />
M-729SZ. Stop engine and watch pressure gauge. Pressure<br />
should not fall perceptible after engine is stopped.<br />
6. If pressure falls, leaking pump valves are indicated.<br />
7. If pressure is below specifications, attach the vacuum<br />
gauge to the inlet port of the pump and operate engine.<br />
Gauge should show a minimum of 6 inches of mercury<br />
for satisfactory operation.<br />
VACUUM BOOSTER CHECK:.<br />
To check the action of the vacuum portion of the combination<br />
fuel and vacuum pump, connect a vacuum gauge to<br />
the inlet port and disconnect outlet. Gauge should show<br />
8-1/2" of mercury at 120 R.P.M. and 12" at 1800 R.P.M.<br />
MANIFOLD HEAT CONTROL:<br />
Check the manifold heat control valve to see that spring is<br />
in good condition and valve is free. Should the Damper<br />
Shaft be found to be stuck, remove the thermostat and<br />
springs, apply penetrating oil or kerosene and tap the shaft<br />
for end play to break the carbon and corrosion. The shaft<br />
should not be oiled. When properly freed, carefully check<br />
springs and thermostat before Installing and replace them if<br />
weak.