Propeller Shaft Brake
In certain operational circumstances, the propeller
may cause the propeller shaft to rotate when the
engine is stopped. This passive rotation is
uncomfortable and can be harmful to the reverse gear
as its oil pump, which is driven by the input shaft, will
not operate when the engine is stopped.
The propeller shaft may be allowed to rotate with a
stopped engine for up to 6–8 hours. After this, the
engine must be started and run for at least five minutes
for lubrication and cooling of the reverse gear.
In cases where the propeller shaft may rotate faster
than in normal operations, e.g. boat under sail, a
temperature gauge should be installed for monitoring
the oil temperature.
Max. permissible temperature for ZF reverse gears is
95°C (203°F).
When the above-mentioned regulations cannot be
met, or when the shaft needs to be stopped for reasons
of comfort, a shaft brake must be fitted. On isolated
occasions, the propeller shaft flange may be locked in
a suitable manner instead.
Optional
47708638 09-2016 © AB VOLVO PENTA 57
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