Simran RPU80 instruction manual Preparation and Testing, Oil filling and bleeding

Installation

5 PREPARATION AND TESTING

5.1 Oil filling and bleeding

When installing a pump unit, it is recommended that the whole system be emptied and refilled. Use a well known oil of a viscosity meeting the specification of the steering gear manufacturer.

Start by opening all stop cocks in the pipes leading to the pump unit. Simultaneously fill the steering wheel pump with oil whilst turning the wheel itself, back and forth. Proceed by opening the couplings at the rudder cylinder whilst still turning the wheel, this will assist in creating pressure within the system, continue until clean oil is seen at the couplings. Now tighten the couplings. Then open the 3 couplings on outlet A, B and C on top of the pump unit, and repeat the same procedure.

5.2 Testing

Set the autopilot to manual mode and use a remote control or the Port/Stbd buttons on the control unit to run the rudder hard over to hard over to check the operation of the system. Check that the rudder goes to the same side as the signal you are giving by the remote control. If not, interchange motor cable connections A and B in the junction unit (J1000B, J101A, J45A). If necessary top-up the expansion tank. Repeat the bleeding procedure (paragraph 5.1) after the equipment has been used for about 5-10 hours.

In the X-series Autopilots (AP300X, AP35, AP20, AP21, AP22) and the AP16, AP25, AP26, AP27 and AP50 autopilots, checking motor rotation or interchange of cables in the junction unit/autopilot computer is not necessary, because the autopilot will determine the correct rotation automatically during the "rudder test".

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