Saab 95 1967, Руководство по обслуживанию

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Freewheel
The freewheel transmits the power from the clutch shaft
to the transmission primary shaft. The freewheel hub,
which is splined to the clutch shaft, has six roller seats
each containing a roller. Each of the rollers is individually
spring loaded by means of a coil spring and a plunger,
which constantly try to press the roller up into the
curved roller seat. The freewheel hub is enclosed in a cyl-
indrical sleeve which is an integral part of the primary
shaft. As from transmission No. F114860, the freewheel
comprises ten rollers each with two springs and plungers.
As from transmission No. 369279, more powerful springs
and plungers have been introduced. Complete freewheels
of earlier and later versions are fully interchangeable.
The clutch shaft is connected to the engine crankshaft,
and when the engine is driving the car the freewheel en-
gages, being caused to do so because the freewheel hub
tends to rotate faster than the primary shaft. The rollers
are then forced up onto the curve shaped roller seats in
the freewheel hub.
When the rollers are held between the freewheel hub and
the sleeve, the primary shaft is forced to rotate at the
same speed as the clutch shaft, with which it is thus vir-
tually united. if, on the other hand, the primary shaft
tends to rotate faster than the clutch shaft, as may occur
when running downhill with the engine idling, for exam-
ple, the rollers are released, Le. they are carried back to
their curve shaped seats by the freewheel sleeve. Conse—
quently, the sleeve — the primary shaft — is able to rotate
faster than the clutch shaft.
The freewheel is equipped with a blocking device by
means of which it can be completely locked.
DIAGRAMMATIC ARRANGEMENT OF FREEWHEEL
1. Clutch shaft 4. Roller
2. Freewheel hub S. Coil spring
3. Freewheel sleeve
400.4 SAAB
Differential and speedometer drive
The speedometer drive is taken from the transmission Din-
ion shaft, being transmitted by way of a worm gear to the
connection for the speedometer cable. .
The differential comprises two differential gears and tWO
front drive shaft gears, one for each front drive shaft.
The differential and front drive shaft gears have plain bev-
el teeth. The shaft gears are splined on stubs, through
which they are connected with inner universal joints and
inner drive shafts. The ring gear, to which the pinion shaft
transmits the transmission torque, is bolted to the differen-
tial case.
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