RDG603A17 – Issue 1 – Shire 30_40_50 WB/RB Manual
Page 22 of 51
18. Hydraulic Drive Transmissions
If an engine is to have a hydraulic drive transmission attached to it instead of a conventional
marine gearbox, a number of points must be observed.
Bobtail engines (i.e. Engines supplied without a marine gearbox), normally do not have a
gearbox oil cooler fitted. However if a cooler is supplied, this will only be suitable to cool a
conventional marine gearbox.
Hydraulic drive transmissions generate far more heat than a conventional marine gearbox.
Therefore the size of the oil cooler installed must be calculated by the hydraulic drive
transmission supplier: to ensure it has sufficient cooling capacity and is sized appropriately
taking into account:
•
Maximum engine power.
•
High ambient summer air temperature.
•
Summer River/Canal/Sea temperature.
•
No additional restriction to engine coolant flow is present.
Oil coolers should be installed in the seawater cooling system after the engine, not before.
Coolers that are installed before the engine will invalidate the engine warranty.
19. Hydraulic Pump Drive Option (Shire 30, 40, 50)
For SAE pump (9T)
If a hydraulic pump is required to drive items such as bow thrusters or hydraulic winches
then the following parts are required to enable drive to be taken from the engine power take
off:
Part No 129484-26200 incorporates:
•
Packing (on gear case side): 171353-26081
•
Cover: 121023-26070
•
Cover packing: 121023-26061
Ratio: 0.90:1
20. Calorifiers
•
These are not fitted as standard but are available as an option
•
If calorifiers are fitted the following instructions must be complied with:
The temperature of coolant flowing to the calorifier from the engine can be between 85 and
90°C. A blender valve must be incorporated in the calorifier / hot water system outlet to
lower the hot water temperature for domestic use.
21. Control Cables
•
Connect engine speed control cable. With the engine off, ensure that the engine
