2nd
re-issue
Page 14
CLUTCH
SPRING
CLUTCH
THRUST
BEARING
PLANET
CONECLUTCH
WHEEL
PLANET
CARRIER
SPIGOT
BEARING
WSM. 12-4
Section E (Gearbox & Overdrive)
ANNULUS
SPEEDOMETER
WHEEL
OUTPUT SHAFT
OIL SEAL
(INTEGRAL WITH
ANNULUS)
SPEEDOMETER
PINION
......
:i:::>
:>
-'
... �
PUMP
INLET
SUNWHEEL
UNI-DIRECTIONAL
CLUTCH (SPLINED
TO INPUT SHAFT)
Fig. 9.
Sectional view of overdrive
unit
shown diagrammatically in Fig. 8. When the over
drive control is operated the valve Is lifted, thus
holding the ball off its seat against the pressure of
the plunger spring. Oil then passes to the operating
cylinders forcing the pistons forward. When the
overdrive control is moved to the disengaged
position, the spring plunger pushes the ball on to
Its seat, and the valve falls away from the ball. Oil
from the cylinders then returns through the centre
of the valve to the sump. Near the bottom of the
valve is a small jet which slows down the emptying
of the cylinders, to provide smooth re-engagement
of direct drive.
CONTROL OF OVERDRIVE
The overdrive Is actuated by a solenoid, controlled
by a switch on the steering column. An isolator
switch mounted In the gearbox top cover ensures
that overdrive can be obtained only In third or top
gear. Both these switches are connected In series
with the operating coil of a relay, and the solenoid
is energised through the relay contacts.
Summary of Contents for ALPINE I SERIES: APLINE II SERIES
Page 1: ......
Page 189: ...Fis 21 Ball pin heirht checkinr fixture in position Details of items 1 to 4 In Fig 22...
Page 208: ...Fla 3 Exploded view of rear axle Hypoid Bevel Drive...
Page 220: ...Page 16 WSM 12 f Section G Rear Axle 0 QQ I I I I I t 0 ii 8 ts t 0 Cl 2 i J...
Page 247: ...Page6 WSM 124 Section J Steering N Iii it...
Page 299: ...Page 40 3 6 7 8 Fis 22 Se rvo unit exploded view Sect WSM 124 ion K Brakes 18 419 GZo 21...
Page 413: ..._ PRINTED IN ENGLAND 9Y WREN PRINTING CQ LTD LONDON...