Installation of Unbalanced Valve

Installation of Unbalanced Valve

If the system was ordered as an Unbalanced System, the kit is installed at the factory. The unbalanced valve accessory is a pilot operated bleed valve. It is intended for use when the steering cylinder fitted to the vessel is of the unbalanced type. In use the bleed valve equalizes the amount of hydraulic oil that is returned to the tank from the low pressure side of the cylinder with the amount of oil that is being pumped to the high pressure side.

These are examples of cylinders that		Unbalanced Kit	These examples are cylinders that Do Not
Need an unbalanced kit			require an unbalanced kit
Unbalanced Cyl.			BALANCED CYLINDER
Unbalanced Cyl.
			Unbalanced Cyl.	Unbalanced Cyl.
Unbalanced Cyl.	Unbalanced Cyl.		Unbalanced Cyl.	Unbalanced Cyl.
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			Manifold	Pump Motor
				Un-balanced
				Valve

O-rings on valve

towards manifold

1) Loosen and remove the four

2) Replace the O-rings in the pump

3) Place the unbalanced valve between

(4) screws on the manifold of the

with the new O-rings in the kit.

pump motor.

the pump motor and the manifold with

the O-rings facing the manifold.

Six O-rings are required and are

supplied in the kit. Three (3) are in the

pump motor and three (3) are in the

unbalanced valve.

Adjustment Screws

4) Insert the new longer screws that came

5) Tighten all four screws apply

with the kit, lining up the holes in the un-

a thread locking compound and

Fig. 1

balanced valve and the pump motor.

tighten to 35 in lbs.

Unbalanced Valve adjustment and calibration:

To check or reset the setting of the valve. To check the setting, compare the amount of brass screw extending outside the valve body on both sides of the valve, (See Fig 1) if this is equal and the shoulder of both brass screws is .015”-.020” below the valve outside surface, then the valve setting is correct. To reset the valve setting, first fully tighten the screws equal amounts by turning them clockwise until they stop. The equal amounts can be verified by comparing the amount of brass screws extending outside the valve body, after tightening they should be equal. If they are not equal, unscrew one and tighten the other one until they are equal. After establishing the equal center position, then unscrew each screw by 2 1/2 full turns.

Do not unscrew the brass screws more than the specified amount as permanent damage will be caused to the housing. Also do not operate the system with the brass screws fully tightened as this will cause flow restrictions and therefore draw more electrical current and may damage components.