RDG603A20 - Issue 10
Page 40 of 100
checked all round.
TIGHTENING TORQUE (M12x40) is 79Nm
The tightening of the connecting screws between the clamping bush and the
hub means that the clamping hub/propeller shaft will be dragged into the coupling by
a few millimetre’s, thereby effectively shortening the installation length. Sufficient free
space (minimum 10mm) should be available between the outer bearing and the
propeller hub.
The propeller-thrust (or propeller-pull in reverse drive) is safely transmitted via the coupling
from the propeller shaft to the gearbox, but the design of the coupling is such that the rubber
must be compressed when sailing in the forward direction. The coupling is not suitable for
use with vee-drive gearboxes having outputs of the quill-shaft arrangement where the
coupling would be subject to a pulling force when sailing forward.
The coupling uses a bonded rubber element, and care should be taken not to contaminate
the rubber by indiscriminate use of solvents or anaerobic liquids.
24. PRM 280DP Gearbox with Power Take Off (Option)
The PRM 280 with power take off is designed for driving hydraulic pumps made to SAEJ77
Series B specification. The maximum power which can be transmitted is 22kW (29.5hp) per
1000rpm.
The power take off operates in the opposite direction to the gearbox input
shaft. The output of the live power take off is the same speed as the engine.
