Hudson 63 1936, Руководство по механическим процедурам

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MECHANICAL PROCEDURE MANUAL
SECTION 3
Page 5
2. Spark Plugs
Lower end of plug porcelain should be a light brown
color. Glossy black porcelain—oil deposit— check oil and
compression. Dull black porcelain—deposit—rich burning.
Dead gasoline mixture—poor white color—over-heated
plug—use cooler type plug. Clean plug with sand blast—
adjust points to .025"gap. Plug should fire under 75 lbs.
Pressure in tester. Replace plugs with cracked porcelains 6r
burnt electrodes. Replace plugs after 10,000 miles of ser-
vice. Always use new gaskets.
3. Valves
Check valve tappet clearance with engine hot and run-
ning. Intake tappet clearance .006". Exhaust tappet clear-
ance .008".
Inject oil having gum dissolving properties into intake
manifold with engine running above idle
speed to remove deposits from valve guides. Recheck
compression.
If compression is still low, grind valves, replacing guides
and valves if worn. Replace cylinder head gasket.
4. Battery—Open Circuit
Gravity reading (hydrometer) 1.250 to 1.290 at 70° F.
Voltage—with no current draw-6 to 6½ volts. Recharge
battery if low on gravity or voltage.
Add water to each cell to bring level 4" above plates after
all electrical tests are completed. Do not overfill.
5. Battery High Rate Discharge
Connect voltmeter to positive and negative terminal
posts of battery (not to cable terminals). Press starter
button.
Voltage should drop back to 3 to 4 volts and quickly
return to 5 to 5½ volts.
If voltage drops only to 4½ to 5 volts and slowly returns
to 5½ volts look for corroded terminals, corroded or broken
cable or ground strap or dirty starter switch, commutator or
brushes.
If voltage does not come back to 5 volts, repeat test,
taking voltage of each battery cell. Variation of voltage in
cells under cranking load indicates worn out battery plates.
If battery is O. K. check for short in cable, heavy engine
oil, seized or worn bearings or short in starter motor.