THE CRANKSHAFT BEARINGS are of the shimless, bronze back, bearing
alloy type. They are attached to the crankcase and caps with brass screws. Three
bearings are used in six cylinder engines and five in eight cylinder engines.
THE CAMSHAFT is of electric furnace alloy, specially processed for maxi-
mum life and quiet valve operation.
CAMSHAFT BEARINGS are of the large steel-back, babbitt-lined, replaceable
type. Three bearings are used in six cylinder engines and five in eight cylinder
engines.
VALVE TAPPETS are of the roller cam type and operate in replaceable guides
clamped in the cylinder block. They are adjustable to maintain proper valve
operating clearances.
VALVES. Exhaust valves are of silchrome alloy steel to withstand the high
temperatures encountered. The intake valves are of nickel chromium steel. Both
exhaust and intake valves operate in replaceable guides.
TIMING GEARS are of silent helical tooth design. The camshaft gear is
attached to the front face of the camshaft by three cap screws. The crankshaft gear
is of cast iron and is pressed on and keyed to the front end of the crankshaft.
FLYWHEEL is of highly polished cold rolled steel, closely balanced to assist in
maintaining smooth engine performance. The starter gear is pressed on the fly-
wheel and is replaceable.
VALVE TAPPET ADJUSTMENT
Valve tappets are adjustable to provide correct operating clearances.
Correct valve clearance for six cylinder engine is .010" on intake and .012" on
exhaust. The eight cylinder engine valve clearance is .006" on intake and .008" on
exhaust valves.
Measurement should be made with flat feeler stock of the proper thickness and
with the engine idling at normal operating temperature.
Valve locations, counting from the front, are as follows:
Model
Exhaust
Intake
6 cylinder l-3-6-7-10-12
2-4-5-8-9-11
8 cylinder l-4-5-8-9-12-13-16
2-3-6-7-10-11-14-15
ENGINE LUBRICATION
The Duo-Flo or double circulating lubrication system is employed in all Hudson
engines. This provides adequate, positive lubrication under all operating conditions.
The system consists of a large capacity, gear driven oscillating plunger oil
pump, a check valve located at the right rear corner of the engine, accessible
external oil lines and an oil reservoir having an upper tray in addition to the storage
pan.
When the engine is started the oil pump immediately draws oil from the lower
reservoir and delivers it positively to the front and rear ends of the engine from
whence it is poured into the front and rear troughs of the oil reservoir upper tray.
The action of the connecting rod dippers
26
HUDSON OWNER’S MANUAL
Содержание 1947 3/4-TON COMMERCIAL
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