Auxiliary Gears; Transmission Description; Auxiliary Gears — Operation; Engine Cranking - Triumph T595 DAYTONA Service Manual

7 TRANSMISSION

AUXILIARY GEARS

6

TRANSMISSION DESCRIPTION

All models are fitted with a six speed, constant mesh
transmission. All gears are straight cut and no
synchromesh system is used. Selection of gears is via a
grooved drum which actuates three selector forks within
the transmission. The forks remain in constant contact
with the gear hubs at all times. The final drive ratio, that is
the ratio between the transmission output sprocket and
the rear wheel sprocket, is variable. The change in ratio
is brought about by selection of front and rear sprockets
with different numbers of teeth.
An integral part of the transmission is the auxiliary gears
which drive the following:
• Water pump
• Oil pump
• Alternator
• Starter Motor
Auxiliary Gears — Operation

Engine Cranking

The starter motor, which is fitted in the upper crankcase,
drives an idler gear in constant mesh with the sprag
clutch. The sprag clutch is mounted on the alternator
shaft. When the starter is energised, the sprag clutch
action allows the alternator shaft on which it is mounted
to be driven by the starter idler gear. The alternator shaft
transmits drive to the crankshaft via the alternator drive
gear and clutch auxiliary drive gear.
9
Engine Started
When the engine starts, and the starter button is
released, the crankshaft drives the clutch and alternator
drive gears causing the alternator shaft to rotate.
Because the alternator shaft and alternator are now
being driven, under engine power, by the alternator drive
gear (as opposed to being driven by the starter idler
gear), the sprag clutch free-wheels and the starter idler
gear does not turn.
Oil and Water Pump Drives
Drive to both the oil and water pumps is supplied by a
gear and shaft in mesh with the clutch auxiliary gear.
The oil pump auxiliary gear is connected to the oil pump
by a shaft, to which an intermediate gear is fitted. The
intermediate gear drives the oil pump drive gear thus
driving the oil pump. At the other side of the oil pump, a
slotted shaft extends, from which the water pump is
directly driven.
7.6
Tke2pn
1. Starter Motor
2. Alternator
3. Starter Idler Gear
4. Sprag Clutch
5. Alternator Drive Gear
6. Clutch Auxiliary Gear
7. Oil Pump Auxiliary Gear
8. Oil Pump Intermediate Gear
9. Oil Pump Drive Gear
10. Oil Pump