RDG603A20 - Issue 10
Page 39 of 100
Skin tanks will also need to be increased by up to approx. 10% to dissipate the additional
heat generated, when a hydraulic drive system or hydraulic bow thruster is used.
An additional separate skin tank of suitable capacity with separate water circulating pump will
need to be fitted for a hydraulic drive transmission.
Hydraulic oil coolers should be installed after the engine, not before. Coolers
that are installed before the engine will invalidate the engine warranty.
22. Hydraulic Pump Drive Option (Shire 38, 40, 45, 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
23. Centa Coupling CF-M-160 (RDG2779)
Centa have given Barrus permission to use the following instruction on how to fit the coupling:
When assembling the coupling all the bolts and nuts must be tightened to the correct torque
using a torque wrench.
Tightening by “feel” will not give a satisfactory result.
Remove the clamping bush from the coupling.
Degrease the propeller shaft and the bore of the clamping hub. Leave the special
grease only in the tapered bore of the coupling hub, and on the outside of the clamping
hub.
DO NOT USE SOLVENTS.
Mount the coupling onto the gearbox output flange. Note: The M10 tapped holes in
the coupling are 15/17mm, so care must be taken to use screws or studs of the correct
length. Centa recommend the use of M10 x 25 screws or M10 x 40 studs. If using
studs the shorter (10mm) screwed portion should be inserted into the coupling.
TIGHTENING TORQUE IS 45Nm
Push the clamping hub fully onto propeller shaft.
Connect the clamping hub/propeller shaft onto the coupling. The connecting screws
of the clamping bush must be tightened alternately in several steps until the required
tightening torque is reached. Finally, the tightening torque of all fasteners must be