the condition of the battery by measuring the specific gravity of the
electrolyte in each cell, using a hydrometer. Specific gravity readings
and their indications are as follows:
These figures assume
an electrolyte temperate of 60 degrees F. (15.5 degrees C.). If one cell
gives a reading very different from the rest, it may be that acid has
leaked from the particular cell or there may be a short circuit between
the plates0 in which case the battery should be inspected at a service
|Fig. 46. Voltage control box
and fuse box.
The fuse termed “A2” protects the accessories which are connected so that they operate irrespective of whether the ignition is on or off:
Clock, map light and interior lights.
The fuse termed “A4”
protects the accessories which are connected so that they operate only
when the ignition is switched on:
All other components
are not fused.
|Fig. 47. Overdrive fuse unit.
The fuse unit for the overdrive electrical system is situated t& the right on the engine side of the scuttle.
A blown fuse is indicated as follows:
(a) When in normal, unable to engage overdrive.
(b) When in overdrive, the unit will re-engage normal drive irrespective of throttle opening.
Spare fuses are provided in the fuse box; only 35 amp cartridge type fuses must be used.
In the event of the starter pinion becoming jammed in mesh with the flywheel, it can tisually be freed by withdrawing the dust cap and turning the starter armature by means of a spanner applied to the shaft extension at the commutator end.
|Fig. 48. Distributor
(“75” and “90”)
D-Contact breaker pivot.
G-Screws securing movable contact.
H-Cable securing nuts.
clean the distributor as follows
1. Wipe the inside and outside of the cap with a soft, dry cloth; ensure that the small carbon brush works freely in its holder.
2. Slacken the nuts on the terminal block and lift off the spring and moving contact. Ensure that the contacts are free from grease or oil; if they are burned or blackened, clean with a fine carborundum stone or very fine emery cloth and wipe with a petrol-moistened cloth. Replace the moving contact.
3. Check and adjust the contact breaker clearance as follows:
(i) Remove the distributor
cap and turn over the engine by hand until the contacts are fully open.
Periodically the dynamo
must be lubricated at the ciommutator end bearing by inserting the nozzle
of a pump type oil can in the small central hole and injecting sufficient
engine oil to moisten the lubricating pad.
49, Dynamo lubrication.
The twin bumper-mounted horns are adjusted on initial assembly and should not require attention for a considerable time. Adjustment merely takes up wear of moving parts and does not alter the pitch of the note; proceed as follows
1. Ascertain that the horn failure or faulty note is not due to some outside source, such as a discharged battery, loose connection, loose part adjacent to the horn, etc.
2. Disconnect the supply lead from the satisfactory horn, taking care that the end does not contact any part of the car.
|Fig. 50. Horn adjustment.
Remove the cover from the faulty horn. Slacken the locknut on the fixed
contact and rotate the adjusting nut until the contacts are just separated
(indicated by the horn failing to sound, when the horn ring is momentarily
4. Turn the nut half a revolution in the opposite direction and tighten the locknut.
5. Replace the cover and connect the other horn.
6. If the note is still unsatisfactory, the horn should be examined at a service depot.
|Fig. 51. Headlamp bulb removal.|
Slacken the screw at the bottom of the headlamp rim and lift off the rim and dust-excluding rubber. Press in the light unit against the tension of the springs on the three adjustment screws, turn it anti-clockwise and withdraw. Twist the adaptor in an anti-clockwise direction and pull it off the light unit; the bulb can then be replaced and the unit reassembled.
52. Headlamps and fog lamp beam-setting board.
A-Board R.H.D. cars.
B-Board L.H.D. cars.
C-Concentrated area of light, L.H. headlamp.
D-Concentrated area of light, R.H. headlamp.
E-Concentrated area of light, Fog lamp (R.H.D. cars).
F-Concentrated area of light, Fog lamp when fitted to L.H.D. cars.
G-35.5 in. (890 mm.)
H-32.5 in. (812 mm.)
J-17 in. (430 mm.)
L-30.56 in. (1126 mm.)
LAMP BULB REPLACEMENT
To fit a replacement bulb, unscrew the single securing screw at the bottom of the lamp rim and remove the rim and light unit assembly. The bulb can be removed from the back of the light unit when the spring clips attached to the bulb are pressed inwards.
Fix the spring clip to the replacement bulb and place the bulb in the holder, taking care that the marking “TOP” is uppermost. Reassemble the unit.
|Fig. 53. Side lamp bulb removal, 1954-55|
LAMP BULB REPLACEMENT, 1956
Prise up rubber lip and remove chrome rim complete with glass. The bulb can then be replaced and the unit reassembled.
|Fig. 54. Side lamp bulb removal, 1956 onward|
LAMP BULB REPLACEMENT, 1954 Models
Slacken the two securing screws and remove the rim assembly. The outer (dual filament) bulb is the stop/tail bulb; on North American cars a second bulb is fitted in the inner socket to act as a direction indicator.
|Fig. 55. Stop/tail lamp bulb removal|
LAMP BULB REPLACEMENT, 1955 ONWARD
Slacken the two securing screws and remove the rim assembly. The lower (dual filament) bulb is the stop, tail bulb while the second bulb, fitted in the upper socket, acts as a direction indicator.
|Fig. 56. Stop/tail lamp bulb removal.|
NUMBER PLATE AND REVERSE LAMP BULB REPLACEMENT
Slacken the two securing screws and remove the rim assembly. The reverse lamp bulb is the centre one; the outer bulbs provide number plate illumination
|Fig. 57. Rear number plate and reverse lamp bulb removal.|
Every 6,000 miles (10.000 Km.) lubricate the trafficators as follows
1. Apply one drop of thin machine oil (by brush) to the catch pin between the arm and the operating mechanism.
2. Remove the arm fixing screw, slide off the arm cover and apply a drop of thin machine oil to the pivot pin. Replace the cover, making sure that the side plates engage with the slots on the underside of the spindle bearing.
|Fig. 58. Trafficator maintenance.
INDICATOR LAMP BULB REPLACEMENT, 1955 ONWARD
Turn the lamp glass and rim in an anti-dockwise direction until it can be lifted off; renew the bulb, press on the glass and rim and turn as far as possible.
|Fig. 59. Front indicator lamp bulb removal.|
|LUGGAGE BOOT LAMP BULB REPLACEMENT
The bulb is visible in the boot lid for direct replacement.
|Fig. 60. Clock, 1959 models illustrated.|
ADJUSTMENT, 1954-58 models
To adjust the hands of the electric clock, push in the knob on the left of the instrument (just behind the facia rail) and turn in the required direction.
CLOCK ADJUSTMENT, 1959 models
1. Adjust as necessary by means of the regulating screw in the left-hand front face of the clock.
INTERIOR LAMP BULB
MAP LIGHT BULB
NOTE: With dual colour
cars the pencil supplied is suitable for the lower colour only.