INTRODUCTION
SeaStar offers rugged 3-line Hynautic Heavy Duty steering systems for most work and pleasure vessels up to 70 feet.
Heavy Duty helms combine one or two bi-directional axial piston pumps with pilot check and make-up check valving. The result is a unit which prevents rudder feedback, is very efficient (even at low RPM), and is immediately adaptable to multi-station use.
A wide choice of helm displacements and cylinder configurations make it easy to spec a system which can handle a variety of large boat performance requirements and accommodate most user preferences.
Features
• Low friction heavy duty hydraulic steering.
• Helm/cylinder combinations for most inboards. Marine grade materials.
• Heavy duty helms available in three displacements, to accommodate most applications and user preferences.
• Helms available with 1” straight shaft or 3/4” tapered. Mount facing any direction.
• Quick air purge relief valve.
• Fluid fill at remote reservoir.
• Heavy duty brass cylinders. Two-axis articulation. Easy installation for single or dual rudder vessels.
• Meets or exceeds applicable standards.
• Accepts most steering wheels.
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Application Guide
Order Guide
Helm Optins
Tubing Hose Options
Cylinder Options
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APPLICATION GUIDE
| FOR VESSEL SIZES UP TO: | HELM PUMP MODEL | STEERING WHEEL TURNS |
REQUIRES CYLINDER MODEL (2x = 2 Cylinders) |
TUBING DIAMETERS when distance from Cylinder to farthest Helm is: |
MAX. SUGG. H.P. | SUGG. AREA FEET (meters) |
|
| 40 Feet or Less |
40 Feet or More |
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| Planing Hulls | |||||||
| 35-50′ (11-15m) | H-21 or H-25 | 5.0 | HC5350 or HC5356 | 1/2” | 5/8” | 450 | - |
| 40-50′ (10-18m) | H-21 or H-25 | 6.8 | HC5351 or HC5357 | 1/2” | 5/8” | 750 | - |
| 40-50′ (10-18m) | H-42 | 4.7 | HC5351 or HC5357 | 1/2” | 5/8” | 750 | - |
| 45-60′ (14-18m) | H-42 | 7.4 | HC5378 or HC5379 | 1/2” | 5/8” | 950 | - |
| 45-60′ (14-18m) | H-41 | 5.4 | HC5378 or HC5379 | 1/2” | 5/8” | 950 | - |
| 55-65′ (17-20m) | H-41 | 5.4 | HC5378 or HC5379 | 1/2” | 5/8” | 1200 | - |
| to 70′ (to 21m) | H-41 | 10.8 | 2x HC5378 or HC5379 | 1/2” | 5/8” | 1500 | - |
| to 70′ (to 21m) | H-41 | 14.2 | 2x K-8 | 1/2” | 5/8” | 1500 | - |
| Displacement Hulls – Tug Boats, Net Haulers | |||||||
| to 30′ (6-9m) | H-21 or H-25 | 5.0 | HC5350 or HC5356 | 1/2” | 5/8” | 200 | - |
| 30-35′ (6-11m) | H-21 or H-25 | 6.8 | HC5351 or HC5357 | 1/2” | 5/8” | 250 | - |
| 30-35′ (6-11m) | H-42 | 4.7 | HC5351 or HC5357 | 1/2” | 5/8” | 250 | - |
| 26-40′ (8-12m) | H-42 | 7.4 | HC5378 or HC5379 | 1/2” | 5/8” | 400 | - |
| 26-40′ (8-12m) | H-41 | 5.4 | HC5378 or HC5379 | 1/2” | 5/8” | 400 | - |
| 30-45′ (9-14m) | H-41 | 5.4 | HC5378 or HC5379 | 1/2” | 5/8” | 450 | - |
| to 50′ (to 15m) | H-41 | 10.8 | 2x HC5378 or HC5379 | 1/2” | 5/8” | 500 | - |
| to 50′ (to 15m) | H-41 | 14.2 | 2x K-8 | 1/2” | 5/8” | 500 | - |
| to 50′ (to 15m) | H-41 | 20.0 | 2x K-9 | 1/2” | 5/8” | 500 | - |
| Displacement Hulls – Work and Pleasure Boats | |||||||
| to 40′ (9-12m) | H-21 or H-25 | 5.0 | HC5350 or HC5356 | 1/2” | 5/8” | 300 | - |
| 40-45′ (12-14m) | H-21 or H-25 | 6.8 | HC5351 or HC5357 | 1/2” | 5/8” | 350 | - |
| 40-45′ (12-14m) | H-42 | 4.7 | HC5351 or HC5357 | 1/2” | 5/8” | 350 | - |
| 40-55′ (12-17m) | H-42 | 7.4 | HC5378 or HC5379 | 1/2” | 5/8” | 500 | - |
| 40-55′ (12-17m) | H-41 | 5.4 | HC5378 or HC5379 | 1/2” | 5/8” | 500 | - |
| 45-65′ (14-20m) | H-41 | 5.4 | HC5378 or HC5379 | 1/2” | 5/8” | 650 | - |
| to 75′ (to 23m) | H-41 | 10.8 | 2x HC5378 or HC5379 | 1/2” | 5/8” | 750 | - |
| to 75′ (to 23m) | H-41 | 14.2 | 2x K-8 | 1/2” | 5/8” | 750 | - |
| Sail Boats – Skeg Rudder | |||||||
| to 40′ (9-12m) | H-21 or H-25 | 5.0 | HC5350 or HC5356 | 1/2” | 5/8” | - | 9 (.9) |
| 40-45′ (12-14m) | H-21 or H-25 | 6.8 | HC5351 or HC5357 | 1/2” | 5/8” | - | 10 (1) |
| 40-45′ (12-14m) | H-42 | 4.7 | HC5351 or HC5357 | 1/2” | 5/8” | - | 10 (1) |
| 40-52′ (12-16m) | H-42 | 7.4 | HC5378 or HC5379 | 1/2” | 5/8” | - | 17 (1.6) |
| 40-52′ (12-16m) | H-41 | 5.4 | HC5378 or HC5379 | 1/2” | 5/8” | - | 17 (1.6) |
| 50-60′ (15-18m) | H-41 | 5.4 | HC5378 or HC5379 | 1/2” | 5/8” | - | 18 (1.7) |
| to 65′ (to 20m) | H-41 | 10.8 | 2x HC5378 or HC5379 | 1/2” | 5/8” | - | 20 (1.9) |
| to 65′ (to 20m) | H-41 | 14.2 | 2x K-8 | 1/2” | 5/8” | - | 20 (1.9) |
| Sail Boats – Spade Rudder | |||||||
| to 40′ (9-12m) | H-21 or H-25 | 5.0 | HC5350 or HC5356 | 1/2” | 5/8” | - | 7 (.6) |
| 40-45′ (12-14m) | H-21 or H-25 | 6.8 | HC5351 or HC5357 | 1/2” | 5/8” | - | 8 (.7) |
| 40-45′ (12-14m) | H-42 | 4.7 | HC5351 or HC5357 | 1/2” | 5/8” | - | 8 (.7) |
| 35-46′ (11-16m) | H-42 | 7.4 | HC5378 or HC5379 | 1/2” | 5/8” | - | 15 (1.4) |
| 35-46′ (11-16m) | H-41 | 5.4 | HC5378 or HC5379 | 1/2” | 5/8” | - | 15 (1.4) |
| 40-50′ (12-15m) | H-41 | 5.4 | HC5378 or HC5379 | 1/2” | 5/8” | - | 15.5 (1.4) |
| to 60′ (to 18m) | H-41 | 10.8 | 2x HC5378 or HC5379 | 1/2” | 5/8” | - | 16.5 (1.5) |
| to 60′ (to 18m) | H-41 | 14.2 | 2x K-8 | 1/2” | 5/8” | - | 16.5 (1.5) |
Notice
The application guide should be used with discretion. The chart is only a guide to selecting a steering system. A steering system manufacturer cannot anticipate all the variables in boat-rudder design that affect the steering loads. It is the final responsibility of the boat builder/designer to specify maximum expected steering loads. If the required information is not available, please see the Displacement and Planning Hull data sheets on page 10-21 and page 10-22. These sheets after being completely filled out can be faxed to Teleflex Technical Support at 604-279-2202.
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ORDER GUIDE
| DESCRIPTION | PART NO. |
| Components | |
| Hynautic H-20 helm (1” straight shaft) | H-21 or |
| Hynautic H-20 helm (3/4” tapered shaft) | H-25 or |
| Hynautic H-40 helm (1” straight shaft) | H-42 or |
| Hynautic H-40 helm (3/4” tapered shaft) | H-42-02 or |
| Hynautic H-40 helm (1” straight shaft) | H-41 or |
| Hynautic H-40 helm (3/4” tapered shaft) | H-41-02 |
| H-20 Fittings Kit for Main Station | HF-10 |
| H-40 Fittings Kit for Main Station | HF-21 |
| Inboard Cylinder | HC5350 |
| Reservoir – Standard (2 quart) | R-06 |
| Relief Valve (950 PSI) | MSV-21 |
| Relief Fittings (1150 & 1175-21-1) | MSVF-07 |
| Relief Fittings (1175-42-1 & up) | MSVF-13 |
| Copper Tubing | 1/2” or 5/8” OD |
| Fitting Kit (for 1/2” Copper Tubing) | HF5590 or |
| Fitting Kit (for 5/8” Copper Tubing) | HF5592 |
| Hose Kit for Copper Tubing (2 hoses) | HA5731 |
| SeaStar Oil (1 Gallon) | HA5440 |
| Options | |
| Pivot Mount Inboard Cylinder | K-31 |
| Dual Cylinder Hose 2’ (.6m) | HA5732 |
| Dual Cylinder Hose 3’ (.9m) | HA5733 |
| Dual Cylinder Hose 4’ (1.2m) | HA5734 |
| Dual Cylinder Hose 5’ (1.5m) | HA5735 |
| Dual Cylinder Hose 6’ (1.8m) | HA5736 |
| Reservoir (2 quart, with hand pump) | R-07 |
| Reservoir (1 quart, with hand pump) | R-11 |
| Reservoir (2 quart) | R-12 |
| Relief Valve (500 PSI) | MSV-19 |
| Reservalve (500 PSI, top read, 3/8) | RV-55 |
| Reservalve (500 PSI, top read, 3/8, w/pump) | RV-55P |
| Reservalve (500 PSI, top read, 5/16, w/pump) | RV-57 |
| Reservalve (950 PSI, top read, 5/16) | RV-60 |
| Reservalve (950 PSI, frt.read, 5/16, w/pump) | RV-67 |
| H-20 Fittings Kit for Second Station | HF-11 |
| H-40 Fittings Kit for Second Station | HF-22 |
| Service Items | |
| Reservoir (2 quart, with hand pump) | R-07 |
| Reservoir (1 quart, with hand pump) | R-11 |
| Reservoir (2 quart) | R-12 |
| Relief Valve (500 PSI) | MSV-19 |
| Reservalve (500 PSI, top read, 3/8) | RV-55 |
| Reservalve (500 PSI, top read, 3/8, w/pump) | RV-55P |
| Reservalve (500 PSI, top read, 5/16, w/pump) | RV-57 |
| SeaStar Oil (1 Gallon) | HA5440 |
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HELM OPTIONS
Four helms are offered in 3 displacements, as noted in the chart at right. The H-21 helm has a 1″ straight wheel shaft; H-25 has a 3/4″ tapered shaft. The H-42 and H-41 helms both have a 1″ straight wheel shaft.
| HELM PART NO. | DISPLACEMENT RANGE | RELIEF VALVE STEERING |
| H-21 | 2.75 cu.in. | 950 psi (66Bar) |
| H-25 | 2.75 cu.in. | 950 psi (66Bar) |
| H-42 | 4.00 cu.in. | 950 psi (66Bar) |
| H-41 | 5.50 cu.in. | 950 psi (66Bar) |
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TUBING / HOSE OPTIONS
Use soft refrigeration type copper tubing for optimum performance. For tube-to-cylinder flex hoses, select a hydraulic hose rated for 1000 PSI (70 bar) working pressure, and with a very low volumetric expansion rating.
| HELM TYPE | DISTANCE—CYLINDER TO FURTHEST HELM | |
| 40 FEET OR LESS | MORE THAN 40 FEET | |
| All | 1/2″ O.D. Copper Tubing | 5/8″ O.D. Copper Tubing |
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CYLINDER OPTIONS
Cylinders are made from brass & stainless steel. Available with stainless rod & ball joint (TMB models) or stainless rod & bronze clevis (TMC models.) Cylinders with ball joints have 2-axis articulation.
The K-31 is an optional pivot mount cylinder which can be used in the systems numbered “8a” and “8b” on the opposite page. With this cylinder, the number of wheel turns becomes 6.4 (using the H-42 helm) or 4.6 (H-41 helm).
| MODEL | PART NO. | DESCRIPTION / MODEL / ROD END CONFIG |
| 7″ Stroke: | HC5350 | Cylinder BA175-7TMB (Rod End Ball Joint) |
| HC5350 | Cylinder BA175-7TMB (Rod End Ball Joint) | |
| HC5350 | Cylinder BA175-7TMB (Rod End Ball Joint) | |
| HC5350 | Cylinder BA175-7TMB (Rod End Ball Joint) | |
| 11″ Stroke: | HC5378 | Cylinder BA200-11TMB (Rod End Ball Joint) |
| HC5379 | Cylinder BA200-11TMC (Rod End Ball Clevis) |
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