RDG603A11 - Issue 8 - Shire 14 70, 85 & 130 WB Owners
Manual Page 24 of 50
17.
Hydraulic Drive Transmissions
If an engine is to have a
Hydraulic Drive Transmission
attached to it, 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 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
Skin tanks will also need to be increased by approx. 10% to accommodate the
additional heat dissipation required.
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.
18.
Hydraulic Pump Drive (Shire 70)
For SAE type 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. 129980-26220 incorporates:
•
Applicable cover: 121023-26070
•
Packing:121023-26061
•
Bearings: 129900-26250 x 2pcs (included in the specialised gear case)
•
For high discharge volume: above 20cc/rev
Ratio: 1.231:1
