Simran RPU80 instruction manual Small and sudden heading changes while on automatic steering

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Fault tracing

7.7Rudder movement stops as water pressure on the rudder increases.

(J1000B, J101A, J45A only) Probable reasons:

1.Overload. Check whether the r.p.m. of the motor is too low. Eventually turn potentiometer RV1 in junction unit clockwise (CW) until rudder movement is recovered.

7.8When on automatic steering, the boat swings from side to side without stabilizing after course changes

(J1000B, J101A, J45A only) Probable reasons:

1.The rudder movement is too slow. Correct as in paragraph 7.7

2.Wrong setting of the autopilot. Refer to the set-up procedure for the autopilot.

7.9Small and sudden heading changes while on automatic steering

(J1000B, J101A, J45A only) Probable reasons:

1.The rudder movement is too fast. Turn potentiometer RV1 in junction unit counter-clockwise (CCW) until optimum rudder speed is achieved.

2.Refer to paragraph 7.8.2.

20220422N

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Contents Simrad RPU80/160/300 Reversible Pump Copyright 20220422N Document revisions Contents Technical Specifications General Introduction20220422N Bosvik Norwegian RPU160 RPU300 BCS ItalianCapilano, Flexatrol Canadian. See Seastar Harmek Norwegian HC HYDRO-CONTROL GermanLecomble & Schmitt France RPU160 RPU300 HynauticSeipem Italian RPU160 RPU300 Lecomble & Schmitt Old modelsSLEIPNER, Hydrive Norwegian RPU160 RPU300 Servi NorwegianTeleflex See Seastar Tenfjord Norwegian Vetus DutchWagner Canadian RPU160 RPU300 VetusMeasurements and Calculations for Applying the RPU Calculation of cylinder volumeMinimum rudder time adjustment Capacity nomogram for Reversible Pump RPU80/RPU160/RPU300 Construction Description of RPU80/RPU160/RPU300Principle of operation ref. -1 and figure Gear pump Valve blockPressure operated non-return check valves on outlet a and B Suction valves on outlet CPipe connections Mechanical Installation InstallationInstallation of pipes Connection to expansion tank Connection to hand hydraulic steering gear J3000X, J300X, J300X-40, J50, J50-40 AC10, AC20, AC40 Electrical installationOil filling and bleeding Preparation and TestingTesting Electric motor MaintenanceDismantling Pump motor is not running/not responding to rudder command Fault TracingPiston rod does not move with rudder commands Excessive noise from the pump unitPiston rod of the rudder cylinder does not move smoothly Steering wheel is turning while pump unit is operatedSmall and sudden heading changes while on automatic steering Activator reduces the hardening time to 1 hour Rudder moves only in one direction with pump runningSpecifications Technical SpecificationsDimensions RPU80 performance RPU300 performance RPU160 performancePos Qty Gear pump parts Spare PartsRPU80/RPU160/RPU300 Parts for Fracmo motors Motor parts LemacPos Qty Gear pump parts Previous RPU80 model RPU80 Previous model gear pumpEurope Sales and Service Worldwide