H U D S O N E I G H T
A D J U S T M E N T
Fan and Water Pump
To adjust the belt, loosen the nut "A" and raise the fan
until the belt can be deflected 5/8" below a straight edge
laid on the fan and pump pulleys. This measurement of
deflection is indicated in the illustration at "B."
Do not adjust the belt too tight as it will throw an
excessive load on the fan and pump bearings.
Adjust the water pump packing gland "C" finger tight.
Do not tighten with a wrench as the packing may bind the
shaft and throw a heavy load on the belt.
Carburetor
Spark plugs and breaker points should be cleaned, spark
gaps properly spaced and all residue in gasoline passages
removed before adjusting the carburetor.
See page 28 for removal of vacuum tank filter to stop
flow of gasoline while cleaning carburetor.
Clean carburetor filter screen "B."
Adjust set screw "C" for correct idling speed of seven
miles per hour.
Turn air screw "A" until the end is flush with the end of
the ratchet spring bearing against it. This is the normal
mixture adjustment and the final setting should be within
turn of this point. Warm engine to proper operating tem-
perature. Turn air screw counterclockwise until the engine
hesitates, then clockwise one notch at a time until the
engine runs smoothly.
The heat supplied to the carburetor from the exhaust is automatically controlled by a
thermostat and requires no adjustment.
The air cleaner unit should be cleaned every 2500 miles, except under extremely dusty
operating conditions when the cleaning should be more frequent. The unit can be lifted off the
carburetor silencer after removing the thumbscrews "D." Wash in gasoline and then soak with
motor oil. Drain off excess oil and replace.
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