A complete hydraulic steering package with all hardware, oil, and hoses!
This is a high-performance steering system rated for up to 300 HP and 70 MPH and faster hulls.
System compares to a Seastar Pro in every way except price.
The proper steering system is a critical factor in achieving optimal boat handling and safe operation. The combination of engine horsepower, propeller torque, hull design and boat speed applies different loads on the steering system. As the resulting steering forces vary considerably from boat to boat and motor to motor, maximum care must be taken to ensure the steering system is the proper one for your application.
The following points have been developed to assist you in making a system selection and to alert potential problem areas.
- Steering forces increase remarkably when the speed and horsepower of the boat increase, the torque of large outboard engines may cause a boat to turn sharply from a straight heading or make it difficult to bring out of a turn.
- Larger boats with displacement hulls and inboard rudders or sterndrive engines not equipped with power steering can create very high steering loads, exceeding the capacity of mechanical systems. Hydraflex hydraulic steering systems are recommended for these type of boat.
ULTRAFLEX HYDRAULIC STEERING SYSTEMS
HOW THE SYSTEM WORKS
Under normal operating conditions, a turn of the steering wheel will send the oil from the helm unit into one of the two connecting hydraulic lines.
The oil will be pumped into one of the chambers of the cylinder and either extend or retract the cylinder rod, depending on the steering wheel rotation.
The fluid going out from the other chamber of the cylinder is returned to the helm via the other hydraulic line.
There are only two basic components in all the hydraulic steering systems.
These are the helm unit and the cylinder, connected by nylon or copper tubing. The helm unit consists of both a hydraulic pump and a valve assembly.
The valve assembly prevents outgoing fluid from returning along the same line, isolates each steering station, locks the rudder and eliminates rudder “feedback” to the helm.
The cylinders are double acting and may be balanced or unbalanced, (in which case the rod extends through only one end of the cylinder).
SUGGESTIONS AND WARNINGS WHEN SELECTING AN HYDRAULIC STEERING SYSTEM
The strength required to drive a boat equipped with an hydraulic steering system is inversely proportional to the number of turns of the wheel lock-to-lock. The wheel turns are determined by the ratio between the cylinder volume, pump displacement and the free movement of the rudder.
With the same type of cylinder installed on the engine, the less are the turns, the faster is the response but higher is the effort; more wheel turns, slower is the response and lower is the effort.
Other factors that can influence steering effort are:
- Vessel speed
- Rudder dimension, or engine power
- Propeller selection
- Hull type (displacement, planning, etc.)
- Sea conditions
- Oil viscosity
FRONT MOUNT HELM PUMPS
UP28 F, UP33 F, UP39 F
- Available in three different displacement sizes
- Compact design
- Ball bearing piston race
- Built-in lock valve for positive rudder lock
- Integral relief valve for over-pressure protection
- 3/4″ tapered stainless steel shaft
- Easily accessible lock valve and shaft seal for replacement
- Cast iron rotor for greater durability and longer life
- Convenient front of dash fill
- 1/4″ NPT fitting for 3/8″ tube
- Complete with elbow fittings
- X56 – 39465 S square flange or X57 – 39464 P round flange permit to install the pumps in an intermediate dashboard position.
FRONT MOUNT CYLINDERS
The number of turns lock to lock is equal port to starboard or vice-versa Detail Specifications Front Mount Cylinder.
SPECIFICATIONS UC128- OBF
Volume 128cc – 7.8 cu. in. Output
Force 450 Kg – 992 lbs.
Inside diameter 35 mm – 1.37 in.
Stroke 198 mm – 7.79 in.
Fittings for 3/8″ high pressure flex hose
Please enter Engine HP and Engine Make before Ordering!