Page 70 - Dometic_RideandHandlingCatalog_2022

STEERING
HYDRAULIC STEERING / STEERING KITS / CATAMARAN
SEASTAR CATAMARAN HYDRAULIC SYSTEM
Dometic always recommends a mechanical tie bar between engines where possible. In applications where a mechanical tie bar cannot be fitted, it is recommended that you use a “Liquid Tie Bar Valve”. This valve will serve two purposes; assisting with the air removal from the system and allows the user to re-align the engines when they come out of sync. Regardless of the application, a mechanical, or, liquid tie bar must be fitted. Due to the potential of leakage across the piston seals, use of standard SeaStar Outboard cylinders may require frequent engine realignment. If you must use a “Liquid Tie Bar”, Dometic recommends that you order the following parts below. Doing so will decrease the amount of re-alignment required.
STEERING CYLINDERS
NOTICE:
HA5471-2, LIQUID TIE BAR VALVE
This valve assists with air removal and re-alignment of the engines when required without having to break into the hydraulic system.
HC5375-3, CATAMARAN STEERING CYLINDER
The HC5375-3 steering cylinder has the same mounting and design properties as the HC5345-3 front mount cylinder. The internal piston seals are different. This difference decreases the amount of engine re-alignment that you may encounter.
SEASTAR PRO HELM
Use of a SeaStar PRO helm coupled with the HC5375-3 steering cylinders will drastically reduce the amount of engine realignment that you may encounter. For other engines not using the HC5345-3 please call Dometic Technical Service at 604-248-3858.
SEASTAR PRO HOSE (KEVLAR)
To further reduce engine misalignment, and increase system performance, Dometic recommends the use of SeaStar PRO steering hoses.
Due to plumbing requirements, all “Liquid Tie Bar” systems should use a 1.4 cu.in. or 1.7 cu.in. helm pump. Even though there are physically two cylinders in the system, the total volume of the system is that of one cylinder. Use of a 2.4 helm will result in heavier steering effort.
NOTICE:
As with all other, high horsepower engines, SeaStar Power Assist is recommend to reduce steering effort.
NOTICE:
Bleeding of a “Liquid Tie Bar System” is different than a system fitted with a mechanical tie bar. Please refer to your Installation and Owner’s Manual that is shipped with the liquid tie bar valve.
ALIGNMENT VALVE FOR HYDRAULIC TIE BAR
(WHEN A MECHANICAL TIE BAR CANNOT BE USED)
The SeaStar Cylinder Alignment Valve (part # HA5471-2) will allow for the periodic required realignment of two outboard motors or rudders that are linked together with a Hydraulic Tie Bar as opposed to a solid link or a Mechanical Tie Bar.
A standard helm and SeaStar hoses may be used on vessels not exceeding speeds of 55 MPH. Boats exceeding 55 MPH must use the SeaStar PRO Helm Pump (part # HH5770) and SeaStar PRO Kevlar® Hoses.
Figure 1 - HA5471-2 ALIGNMENT VALVE
70 — DOMETIC.COM