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Source – Volvo AB, Göteborg, Sweden page 22(35)
Reprint 2001 Karl Eric Målberg
of a shaft so that movements of the accelerator pedal influence both the carburettors
simultaneously.
IDLING SETTING
The engine idling setting is correctly
adjusted before the car is delivered from
the factory and should not be altered
later. Should adjustment be necessary it
should be carried out by a Volvo
workshop so that the engine delivers the
highest output. Provisional adjustment
can, however, by listening to the
induction sound on the carburettors while
the setting screws on the carburettors
are screwed inwards or outwards to
increase or decrease the idling speed.
When the setting is correct induction
sound on both the carburettors should be
the same.
LUBRICATION OF DAMPING CYLINDERS
Each time the engine oil is changed, the nut on the top of each carburettor should be
removed and the damping plungers should be taken out. Engine oil with the viscosity
SAE 20 of a standard grade (that is to say not multi-grade oil) should then be added
so that the inner tube is full but not the part above this.
Fuel
The gasoline used as fuel should be at least 97 octane. If gasoline with too low
octane value is used, knocking or glow ignition can result.
When the engine is supplied from the Volvo factory it has been adjusted for operation
on 97 octane fuel.
Electrical system
22 Check the battery electrolyte level
If it is to function correctly, the battery should be regularly checked to ensure that the
electrolyte level is not too low. This check can conveniently be carried out when the
car is being tanked. The electrolyte level should be about ½” (5-10 mm) above the
cell plates. If necessary, top up with distilled water. Never add too much since this
can cause the acid to splash over and cause damage in the engine compartment.
Never check the electrolyte level by using a lighted match. The gases formed in the
cells are very explosive.
23 Check the state of charge of the battery
The state of charge of the battery should be checked after every 3,000 miles (5,000
km). This check is carried out with the help of a hydrometer, which shows the specific
gravity of the battery acid. This varying with the state of charge of the battery, see
page 33 As the same time as the state of charge is checked, the terminals and the
terminal bolts should be checked to make sure that they are well tightened and they
should be smeared with grease or vaseline. If necessary they can be dried with a
cloth or brushed with a steel brush before being greased.