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 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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