{"product_id":"qbp673739","title":"B\u0026G T0 Hydraulic Ram Drive, 12V, IP67, 350kg Thrust, 203mm Stroke","description":"\u003ch6\u003eOverview\u003c\/h6\u003e\u003cp\u003eThe B\u0026amp;G 000-13902-001 is a Type 0 hydraulic ram drive for autopilot steering on boats with back-drivable mechanical primary steering.\u003c\/p\u003e\u003cp\u003eIt is a self-contained linear actuator with a hydraulic cylinder, pump, motor, clutch, and reservoir in a sealed, pre-filled unit. It runs on 12 VDC with a nominal 12 second hard-over time, up to 350 kg intermittent thrust, and a maximum stroke of 203 mm (average hydraulic volume 234 cc). The housing is rated IP67, and the specified operating temperature range is -15°C to +55°C.\u003c\/p\u003e\u003cp\u003eWith the clutch disengaged, the cylinder can move freely with the helm. When the clutch is energized, the autopilot drives the motor to extend or retract the ram for rudder control, and internal relief valves help protect the unit and mountings during rudder strikes or grounding loads.\u003c\/p\u003e\u003ch6\u003eKey features\u003c\/h6\u003e\u003cul\u003e\n\u003cli\u003eIntegrated cylinder, pump, motor, clutch, and reservoir in a sealed, pre-filled unit for simpler plumbing and service access\u003c\/li\u003e\n\u003cli\u003e12 VDC drive with nominal 12 second hard-over time and maximum stroke of 203 mm\u003c\/li\u003e\n\u003cli\u003eIP67-rated enclosure for wet lockers, bilge-adjacent spaces, and washdowns\u003c\/li\u003e\n\u003cli\u003eUp to 350 kg intermittent thrust with 234 cc average hydraulic volume\u003c\/li\u003e\n\u003cli\u003eClutch lets the ram back-drive with the primary steering when disengaged, then locks in for autopilot control when energized\u003c\/li\u003e\n\u003cli\u003eTypical current draw is 1.3 A at 25% duty (60 kg), with 14.0 A intermittent at 350 kg\u003c\/li\u003e\n\u003cli\u003eClutch coil power is 12 W with a DIN 43650 clutch connection (6 to 8 mm cable)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch6\u003eInstallation and setup\u003c\/h6\u003e\u003cp\u003eThis actuator is intended for under-deck mounting. Plan the location to keep cable runs short, keep the unit away from heat sources, and mount it above areas liable to flooding. Use a solid mounting surface that can carry the thrust loads, and make sure rudder hard stops limit travel rather than the actuator end stops.\u003c\/p\u003e\u003cp\u003eAllow clearance for the full range of movement and for removal of the mounting pin. The supplied tiller bolt is suitable for a quadrant thickness of 12 to 16 mm, with a recommended mounting hole of Ø12.2 to 12.3 mm and an M12 nut torque of 27 Nm. The supplied mounting foot hardware is suitable for mounting to a surface 12 to 24 mm thick, with the four M8 nuts tightened to 17 Nm.\u003c\/p\u003e\u003ch6\u003eCompatibility and fit\u003c\/h6\u003e\u003cp\u003eThis drive is built for steering systems that can be back-driven, where the rudder quadrant or tiller arm moves freely when the clutch is not energized. Check geometry and clearance through the full rudder arc before drilling, and confirm the ram stroke and linkage position match your quadrant layout and required rudder angle.\u003c\/p\u003e\u003cp\u003eThe unit’s overall envelope is 101 x 728 mm and weight is 8 kg, so it typically fits best where there is a straight, unobstructed run to the quadrant and enough space to service the mounting pin and wiring.\u003c\/p\u003e\u003ch6\u003eElectrical and system integration\u003c\/h6\u003e\u003cp\u003ePower is 12 VDC. The motor direction is controlled by polarity: red lead to positive extends, and black lead to positive retracts. Size wiring and circuit protection for the intermittent current draw, and route cables so they cannot chafe or snag on moving steering gear.\u003c\/p\u003e\u003cp\u003eThe clutch uses a DIN 43650 connection and draws 12 W when energized. Plan the installation so the clutch and motor wiring can be reached without disassembling surrounding steering components.\u003c\/p\u003e\u003ch6\u003eHydraulic fluid and maintenance\u003c\/h6\u003e\u003cp\u003eThe sealed system uses mineral hydraulic fluid in the ISO VG10 to VG40 range (ISO 6743-4 HV). Do not use brake fluid. If service is ever required, use a mineral-based fluid that is compatible with nitrile seals.\u003c\/p\u003e\u003cp\u003eKeep the piston rod free from damage and avoid exposing the unit to saltwater spray or immersion wherever possible. If the area is prone to salt mist, regular wipe-downs and checking for corrosion or contamination around the rod and mount points helps keep the steering movement smooth.\u003c\/p\u003e\u003ch6\u003eUse on board\u003c\/h6\u003e\u003cp\u003eThis ram is a good match for boats that need an under-deck linear drive to automate a mechanical steering system and still want the helm to move normally when the autopilot clutch is not engaged. It suits installations where space is limited but accurate rudder control and quick access to the quadrant area matter.\u003c\/p\u003e","brand":"B\u0026G","offers":[{"title":"Default Title","offer_id":52269628391605,"sku":"QBP673739","price":1699.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0977\/8171\/1029\/files\/1300653_qbp673739.jpg?v=1771544939","url":"https:\/\/www.qualityboatparts.com\/products\/qbp673739","provider":"Quality Boat Parts","version":"1.0","type":"link"}