Controls
85
Position A: Maximum slipping
Position B: Trolling fuction off
Verify that the required travel (C) is achived.
For correct measurements consult Volvo Penta or-
ganisation or the gearbox manufacturer.
Trolling valve
Trolling valves can be fitted on most reverse gears as
an accessory.
The trolling valve will reduce the oil pressure on the
disc pack, which will make it slip in a controlled way.
The speed of the propeller shaft can be reduced
up to 80% compared to in a non-slipping condition.
There is normally an engine rpm limit up to which the
trolling valve can be used. A larger oil cooler is some-
times fitted to keep the oil temperature stable. It is
highly recommended to use a thermostat on the gear
box oil cooler.
The benefit of the trolling valve is reduction of the
idling speed of the boat or the option of increasing
engine rpm at low boat speed, for example in order to
use pumps etc. during fishing.
For operating a trolling valve, a single-acting control
with a pushing movement shall be used.
Install the control cable the same way as the gear-
shift control cable. Mark the control TROLLING
VALVE, and the positions DISENGAGED and EN-
GAGED.
B
A
C
Shifting lever
Trolling lever
When operating with the trolling valve engaged,
speed should be kept low in accordance with the in-
structions provided by the manufacturer.
Summary of Contents for D11 series
Page 1: ...Marine Propulsion Diesel Engines Installation 1 1 D E D5 D16 series ...
Page 2: ......
Page 208: ...206 References to Service Bulletins Group No Date Concerns ...
Page 209: ...207 Notes ...
Page 210: ...208 Notes ...
Page 212: ...7748655 English 11 2007 ...