Volvo 120 Operating & Service Manual page 28

FAULT TRACING
The information given below is only intended to serve as a guide in
l ocalizing and temporarily correcting minor faults. After having carried
out any such measures, have them checked and adjusted by an experi-
enced mechanic.
The engine does not start although the starter motor
turns it round at normal speed
1 Check that there is fuel in the tank.
2 If the engine has been warm, starting should be done with the accele-
rator pedal slowly depressed as far as it will go.
3 In wet weather the sparking plug insulators should be wiped clear
and the distributor cap removed and wiped dry if flash-over is
suspected.
4 Check that the fuel line connections on the pump and carburettor are
not leaking and that fuel is supplied to the carburettor.
5 If the engine is turned round for a while without starting, too
rich a fuel mixture can enter the cylinders resulting in the sparking
plugs becoming moist. Blow the cylinders clean by screwing off the
sparking plug and turning round the engine with the starter motor.
Dry the sparking plugs before fitting them.
If the engine still does not start
1 Remove the ignition cable from each plug in turn. Hold the end of
the cable about
from the cylinder block while turning round the
1/ "
4
engine with the ignition switched on. If there is a strong spark, the
fault is probably in the sparking plugs, so these should be changed.
2 If only a weak spark is obtained or none at all, check to see whether
the ignition cables are properly inserted in the distributor and ignition
coil.
3 Remove the distributor cover, check and clean all contact surfaces.
Check that the contact breaker points close properly when the engine
i s turned round. If the contact breaker arm shaft binds, oil it very
sparingly.
If the engine misfires, the reason can be:
1 That one of the ignition cables has loosened in the distributor cover
or from the sparking plug.
2 That one of the sparking plugs is coated with soot or oiled up, in
which case the plug concerned should be cleaned or changed and
the sparking plug gap adjusted.
3 That the distributor cover and rotor arm are cracked or damaged.
4 That one of the ignition cables is in poor condition.
5 That the contact breaker gap in the distributor is insufficient or non-
existent.
6 That the breaker contacts are badly burned.
5 2
Measurements and weights
Length
Width
Height unladen (ready to drive)
Wheelbase
Ground clearance, unladen
Ground clearance , driver and 3 passengers
Track, front
Track, rear
Turning circle
Weight ready to drive
Permissible total weight
Permissible load (without driver)
Permissible axle pressure, front
rear
Permissible roof load
Max. permissible trailer weight
SPECIFICATIONS
4440 mm (175.0")
1 633 mm (64.3")
1 470 mm (58.0")
2600 mm (10'2.4")
210 mm (8.27")
1 70 mm (6.69")
1315 mm (51.77")
1 315 mm (51.77")
9.5 m (31.4")
1 080 kg (2381 lb.)
1 600 kg (3520 lb.)
440 kg (968 lb.)
750 kg (1650 lb.)
900 kg (1980 lb.)
1 00 kg (220 lb.)
1 000 kg (2200 lb.)
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