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Teleflex SeaStar Inboard Power Hydraulic Steering




Technical Reference Manual







Steering today's high horse power luxury yachts and commercial craft all too often challenges physical endurance and cruising enjoyment on the water.

SeaStar Power Steering provides the ultimate in comfort, simplicity, safety and reliability.

Superior design and manufacturing deliver an out standing, rugged product- in the SeaStar tradition.



Applications:

Vessels up to to 120 feet (planing hulls using twin 2.5" bore cylinders).



Features:

  • Effortless steering at any speed.
  • Responsive 3-1/2 turns lock-to-lock.
  • (Number of turns can be varied by helm.)
  • Multiple steering stations can be installed.
  • Compact helm has only a 4-7/16" footprint- needs only 3" dash hole.
  • Tilt Steering available (requires larger dashboard hole).
  • Standard 3/4" tapered steering shaft.
  • (1" straight or tapered versions available).
  • Simplified installation.
  • Easy autopilot interface.
  • Automatic manual back-up steering.
  • Meets A.B.Y.C./N.M.M.A. standards.


How to Spec a System:


  • 1. Vessel size and hull type determine the kind of cylinder required. (All boats over 70 feet in length should have steering loads reviewed by Teleflex Canada.)
  • 2. Engine type determines which power steering pump should be used. If in doubt, contact Teleflex Canada.
  • 3. A SeaStar 1.7 helm is recommended; this will result in a system with 3-1/2 wheel turns lock- to-lock when 9" stroke cylinders are used. If a different number of wheel turns is desired, contact Teleflex Canada for rec om mend ed helm to achieve desired number of steering wheel turns.


How it Works:



SeaStar hydraulic power steering uses the ship's engine(s) to provide the "power" for the steering system, via a mechanically or electric motor driven hydraulic pump.

A manual hydraulic steering system, consisting of a standard SeaStar helm and a hydraulic steering cylinder (fitted with an integral servo cylinder and a power steering valve), supplies the "control" portion of the steering system.

Under normal conditions, with engines running, a hydraulic oil supply is in a stand-by mode, ready to be directed to the steering cylinder as dictated by the steering wheel, servo cylinder and power steering valve.

Turning the steering wheel left or right makes the system go from "stand-by" into "operating" mode and move the steering cylinder accordingly.

In the event of a power source failure, hydraulic oil from the steering helm is automatically diverted into the servo and steering cylinder, providing the helmsman with manual back-up steering.

An engine room mounted oil reservoir allows easy fill and assists the in-line cooler in cooling the hydraulic oil.

An in-line oil filter helps to protect the steering system components against contaminants.





Complete Systems:

See application and ordering guides to select appropriate components.



Components:

HELM:

(Several other helm displacements are available to vary the number of steering wheel turns from lock-to-lock. Several helm options are available including Tilt, rear mount and kits which reduce front mount helm protrusion from the dash.)


CYLINDER:

  • Cylinder-power steering (primary).........HC58__
  • Cylinder-power steering (additional)......HC58__
(1 or 2 required. See Application Guide on following pages.)

OIL COOLERS:

  • Oil Cooler (2.25 Kw, 1" Water Lines).....HP5825
  • Oil Cooler (6.25 Kw, 2" Water Lines).....HP5826

OIL RESERVOIR & FILTER:

  • Oil Reservoir..........................................HP5810
  • Oil Filter.................................................HP5815

HOSE/TUBING

  • Hose/Tubing for Manual Circuit.........5/16
  • (If using 1/4" I.D. tube, runs should be short and SeaStar oil must be used.)
  • Hose/Tubing for Power Circuit..........100R1 type


PUMPS:

  • Outlet Check Power Pump....................HP5820
  • Pressure Relief Twin Pump...................HP5822


Pumps- Right-Hand Rotation:

  • Pump- Belt Drive, Right Rotation
  • (Universal).............................................HP5830
  • Pump- Keyed Shaft, Right Rotation.....HP5848
  • Pump- Keyed Shaft, Direct Drive, Right Rotation (Detroit Diesel)...............HP5832
  • Pump- Keyed Shaft, Direct Drive, Right Rotation (2 GPM).........................HP5834
  • Pump- Direct Drive, Right Rotation (No Flow Control)..................................HP5836


  • Pump- Splined Shaft, Direct Drive, Right Rotation (Caterpillar)...................HP5833*
  • (*Special Order- please consult Teleflex Canada.)
  • Pump- 6-tooth (B Flange) Splined Shaft, Direct Drive, Right Rotation)..................HP5844
  • Pump- 9-tooth Splined Shaft, Direct Drive, Right Rotation........................................HP5837
  • Pump- 9-tooth Splined Shaft, Direct Drive, Right Rotation........................................HP5839
  • Pump- 9-tooth Splined Shaft, Direct Drive, Right Rotation........................................HP5846
  • Pump- 11-tooth Splined Shaft, Direct Drive, Right Rotation........................................HP5838
  • Pump- 11-tooth Splined Shaft, Direct Drive, Right Rotation........................................HP5847
  • Pump- 13-tooth Splined Shaft, Direct Drive, Heavy Duty Right Rotation (Twin Disc)...HP5835


Pumps- Left-Hand Rotation:

  • Pump- Belt Drive, Left Rotation (Universal).............................................HP5831
  • Pump- Keyed Shaft, Right Rotation.....HP5850
  • Pump- Direct Drive, Left Rotation.................HP5841
  • Pump- 9-tooth Splined Shaft, Direct Drive, Left Rotation..........................................HP5843
  • Pump- 9-tooth Splined Shaft, Direct Drive, Left Rotation..........................................HP5845
  • Pump- 11-tooth Splined Shaft, Direct Drive, Left Rotation..........................................HP5840
  • Pump- 11-tooth Splined Shaft, Direct Drive, Left Rotation..........................................HP5842
  • Pump- 11-tooth Splined Shaft, Direct Drive, Left Rotation..........................................HP5849
  • Pump- 11-tooth Splined Shaft, Direct Drive, Left Rotation..........................................HP5852


FLUID:

Use SeaStar fluid [Mil spec H-5606C] with SeaStar 1.4, 1.7, 2.0 & 2.4 helms or Dexron II type ATF if using SeaStar Capilano 1250V/1275V helms.

MISCELLANEOUS:

  • Outlet Check Valve (Power Pump)........HP5820
  • Auto Flow Control (Twin Pump).............HP5821
  • Crossover Pressure Relief.....................HP5822
  • System Pressure Gauge Kit..................HA5821
  • Adapter Kit, Twin Disc #5050................HA5823
  • Adapter Kit, Twin Disc #5061................HA5824
  • Adapter Kit, MAN to V10 Pump.............HA5827
  • Tiller Bolt Kit (stainless steel)................HA5819
  • Pressure Relief Valve (1250psi setting).............HP5818
(Required in a system where the power pump DOES NOT have a built in pressure relief valve. ALL SeaStar Power Pumps have built in pressure relief valves.)

Helm Options:

  • Add-A-Station/Autopilot Fittings Kit.......HF5502
  • (1 required for each additional station or autopilot interface.)
  • Helm Remote Fill Kit (through-dash).....HA5450
(Allows relocation of your SeaStar helm fill to either a more convenient or a more concealed location. This kit can be used with ALL SeaStar helms.)

1.4 HELMS (4.3 WHEEL TURNS WITH 9" STROKE CYLINDER):

  • SeaStar 1.4 Front Mount Helm..............HH5269
  • (Above helm has 3/4" tapered shaft.)
  • SeaStar 1.4 Rear Mount Helm..............HH5260
  • (Above helm has 3/4" tapered shaft.)
  • SeaStar 1.4 Rear Mount Helm..............HH5280
  • (Above helm has 1" tapered shaft.)
  • SeaStar 1.4 Rear Mount Helm..............HH5279
  • (Above helm has 1" straight shaft.) SeaStar 1.4 Sport Tilt Helm/Mech.........HH5744

1.7 HELMS (3.5 WHEEL TURNS WITH 9" STROKE CYLINDER):

(3/4" tapered shaft. Designed for small Lobster and Crabbing vessels, these helms have a stainless steel shaft with heavy duty seal and wiper, which help protect the helm from the abrasive effects of sediment brought on board with traps or pots.)

2.0 HELMS (3.0 WHEEL TURNS WITH 9" STROKE CYLINDER):

(Above helm has 3/4" tapered shaft.)

2.4 HELMS (2.5 WHEEL TURNS WITH 9" STROKE CYLINDER):

(Designed for small Lobster and Crabbing vessels, these helms have a stainless steel shaft with heavy duty seal and wiper, which help protect the helm from the abrasive effects of sediment brought on board with traps or pots.)

CAPILANO HELM (1.8-3.5 WHEEL TURNS WITH 9" STROKE CYLINDER):

  • Capilano 1250V Helm............................HH5250

SEASTAR FRONT MOUNT HELM MOUNTING OPTION KITS:



Service Items:



Application Guide: Power Steering Cylinders

The chart below is only a guide to selecting a steering system. A steering system maker cannot anticipate all the variables in boat-rudder design that affect steering loads. It is the final responsibility of the boat designer/builder to specify maximum expected steering loads. If the required information is not available, contact customer service with rudder dimensions, vessel size and anticipated maximum speed. Boats over 70 feet should have steering loads reviewed by Teleflex Canada. Call 604-270-6899 or go on-line at www.teleflexmarine.com.

Definitions of terms used in the chart: Planing Hull: maximum hull speed normally exceeds 18 knots;

Displacement Hull: maximum hull speed does not normally exceed 18 knots.










Helm Options:

Most SeaStar/Capilano helms can be used with SeaStar Power Steering systems, offering a wide choice of steering response. In addition, SeaStar helms offer a variety of options, including Tilt Steering and behind-the-dash mounting. (Sea Star PS and Capilano helms are available in rear mount versions only and cannot be equipped for Tilt Steering.)






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