Reliant Rebel 700 1967 Workshop Manual page 101

regularly checked and topped-up if necessary. Keep the battery
terminals clean and tight.
The correct fan belt tension is important. A slack belt will slip and
prevent the alternator from fully charging the battery.
Attention should also be given to the cleanliness and security of the
earth leads / braids.
The ignition warning light serves the dual purpose of reminding the
driver to switch off the ignition and acting as a no charge indicator.
With the ignition switched on the lamp should only be illuminated
when the engine is either not running, or is running at a very low
speed. As the engine speed increases the lamp should extinguish.
Failure to do so indicates a fault in the charging system.
Dynamo
The dynamo is a two pole, two brush machine, the field coils being
connected in series with each other, but both in parallel with the
armature.
Lubrication
At intervals of six months (or 6,000 miles (10,000km), whichever
occurs firs, inject a few drops od SAE 30 engine oil into the lubricator
hole on the commutator end bearing.
Testing the dynamo
In the event of a charging fault developing the following preliminary
check should be made with the dynamo in position on the vehicle.
1. Check that the battery is in a good state of charge.
2. Ensure the fan belt is correctly tensioned.
3. Check that the spade connectors on the back of the dynamo
are secure and clean.
4. Disconnect the two leads and link the generator terminals
together with a short length of cable.
5. Start the engine and run at normal idling speed.
6. Clip the black lead of a 0-20 VDC moving coil volt meter to
one of the terminals and connect the positive (red) lead to
ground on the yoke of the generator.
7. Gradually increase the engine speed, when the volt meter
should rise without fluctuation to display a voltage of just
below 20 volts. If the voltage fluctuates an internal fault is
indicated. Excessive sparking at the commutator also
indicates a defect with the dynamo. In either case the
dynamo, available as an assembly only, will need
replacement.
However, before resorting to replacing the unit, remove the existing
assembly from the vehicle and check the condition of the carbon
brushes. These are available and, if worn or contaminated will cause
failure of the charging system so should be replaced.
To remove generator
1. Disconnect the battery and dynamo leads.
2. Unscrew the adjusting arm clamp bot and swing the
dynamo body towards the engine. Remove the fan belt.
3. Remove the lower mounting bolts and lift the dynamo
assembly clear of the vehicle.
4. Replace in reverse order.
Specification
Type
Output
Page
101
Lucas C40
22A at 13.5 volts DC at 2,200 rpm