Volvo B10M, Руководство пользователя

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53
Driving
Heat and cooling
All braking develops heat.
A hydraulic retarder is cooled by the engine cooling system.
This applies to the hydraulic retarder (optional) together
with manual gearboxes as well as the retarder integrated in
automatic gearboxes.
The retarder may overheat in extreme situations. Therefore,
always observe the coolant temperature. Automatic gear-
boxes have a warning light in the lamp panel, which goes
on when the oil temperature in the gearbox gets too high.
(ZF automatic gearboxes also have an oil temperature
gauge in the dashboard.)
If the coolant and/or gearbox oil get too hot during retarder
braking, the retarder should be disengaged if the traffic con-
ditions allow.
As usual, the engine’s cooling capacity increases if the en-
gine speed is increased and this will accelerate retarder
cooling.
The green lamp (see next page ”Fault indication”) that is
normally on constantly when the retarder is active will flash
as long as a separate retarder together with manual gear-
box is too hot. It also has a thermostat that reduces braking
power when the retarder is too hot.
An electromagnetic retarder is cooled by the passing air. If it
becomes too hot during long braking periods, the braking
capacity will be reduced.
The auxiliary braking systems described here (exhaust
brake/retarder) work only on the drive wheels. Braking
only the drive wheels may cause skidding
on slippery roads.
Switch to interrupt retarder activation via brake pedal
Warning!