
2.4Driveunits
Thedriveunitinterfaceswiththevessel’ssteeringsystem.Thetypeofdriverequireddependsonthetypeofvesselandcapacity
oftheassociatedsteeringsystem.
Raymarineautopilotsystemsaccommodatehydraulic,mechanicalandpowerassistedsterndrivesystems.
DrivecategoryAvailabletypes
Suitable
ACU
Drive
maximum
continuous
power
output
supported
byACU:
Type0.5
ACU-100
7A
Type1
ACU-200
15A
Type2
ACU-400
30A
Type3
ACU-400
30A
Hydraulicpumps
Raymarineautopilotsconnecttohydraulicsteeringsystemsusingaruggedhydraulicpump
matchedtothecapacityofthehydraulicsteeringsystem.
Tondasuitablepump,you'llneedtoknowthesize(incc)ofthehydrauliccylinderram(s)
mountedtotherudderonvesselsfeaturinganinboardengine,ortothedriveunitonvessels
featuringoutboardengines.Refertoyoursteeringsystemdocumentationforthisinformation.
Alternatively,youcanlookonthecylinderramitselfforthebrandandmodelnumber.
Onceyouhavethisgure,refertotheCylinderRamSizeChartontheRaymarinewebsiteto
determinewhichhydraulicautopilotpumpiscompatiblewithyourvessel'shydraulicsteering
system:http://www.raymarine.co.uk/view/?id=209.
ConstantRunningpump
(solenoid).
ACU-300
5A
Type2(forvesselswith
amaximumdisplacement
of22,000Kg).
ACU-400
30A Mechanicalhydrauliclineardrives
Designedforlargermechanically-steeredvesselsover20,000kg,hydrauliclineardrivesconsist
ofareversingpump,reservoirandhydraulicram.
Ahydrauliclineardriveunitconnectstotherudderstockviaanindependenttillerarm.
Accessoryttingsfromyoursteeringsystemmanufacturermayberequired.Thevessel’s
steeringsystemmustbecapableofbeingback-drivenfromtherudder.
Correctdriveselectiondependsonthemaximumdisplacementofyourvessel.Additionally,
boththevessel’sttingstructureandthetillerarm(orrudderquadrant)mustbeabletocope
withthepeaklevelsofthrustgeneratedbythehydrauliclineardrive.Forpeakthrustdata,refer
tothetechnicalspecicationsectionoftheHydraulicLinearDriveinstallationinstructions.
Type3(forvesselswith
amaximumdisplacement
of35,000Kg).
ACU-400
30A
Type1(forvesselswith
amaximumdisplacement
of11,000Kg).
ACU-200
15A
Type2Short(for
vesselswithamaximum
displacementof15,000
Kg).
ACU-400
30A
Mechanicallineardrives
Usedinsailingvessels,themechanicallineardrivemovestherudderdirectlybypushing
thetillerarmorarudderquadrant.
Correctdriveselectiondependsonthemaximumdisplacementofyourvessel.
Type2Long(for
vesselswithamaximum
displacementof20,000
Kg).
ACU-400
30A
Type1(forvesselswith
amaximumdisplacement
of11,000Kg).
ACU-200
15A
Mechanicalrotarydrives
Designedforpowerandsailingvesselsystemsthatcanbedrivenfromthehelmposition
throughachainandsprockete.g.cableandrod.
Optionaldrivesprocketsandmodicationtothesteeringchainmayberequired.
Correctdriveselectiondependsonthemaximumdisplacementofyourvessel.
Type2(forvesselswith
amaximumdisplacement
of20,000Kg).
ACU-400
30A
Universalsterndrive
Forusewithinboard/outboard(I/O)vesselswithcablepower-assistedsteering.
ACU-200
15A
Wheeldrive—Power(SportDrive)
Designedforsmallerpowervesselsfeaturingasteeringsystemthatcanbedrivendirectly
fromthehelmposition.
Power(formechanically
steeredvesselswitha
maximumdisplacement
of2,000Kg),or
hydraulicallysteered
vesselswithamaximum
displacementof
3,181Kg).
ACU-200
15A
Planningtheinstallation
13
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