Hydraulic fluid flow through an HWH dual

cylinder (Synchronized) room extension.

The blue areas indicate resting fluid while the room is retracted.

SYNCHRONIZING CYLINDER

ROOM CYLINDER

ROOM CYLINDER

ROOM MANIFOLD

EXTENDSOLENOIDVALVE

RETRACTSOLENOIDVALVE

An internal check valveprevents fluid from returning to the power unit via thepressure port.

Pressure port

ROOM MANIFOLD

EXTENDSOLENOIDVALVE

RETRACTSOLENOIDVALVE

The needle valve of theRETRACT Solenoid Valveprevents fluid from returningto the power unit via thereturn port.

Return port

Room manifold

Two things happen in theroom manifold when theroom control switch is pushed to EXTEND.

One: The needle valve of the EXTEND solenoid valve opens

Two: The power unitruns and pressure opens the check valve.

Hydraulic fluid is free to travel the path of leastresistance through the EXTEND solenoid valve.

SYNCHRONIZING CYLINDER

ROOM CYLINDER

ROOM CYLINDER

ROOM MANIFOLD

As the room cylinders extend fluid is forced into the synchronizing cylinder causing it to retract.

SYNCHRONIZING CYLINDER

ROOM CYLINDER

ROOM CYLINDER

ROOM MANIFOLD

This regenerative path will continue until the room control switch is

released.

The blue areas indicate resting fluid while the room is extended.

SYNCHRONIZING CYLINDER

ROOM CYLINDER

ROOM CYLINDER

ROOM MANIFOLD

Two things happen in theroom manifold when theroom control switch is pushed to RETRACT.

One: The needle valve of the RETRACT solenoid valve opens

Two: The power unitruns and pressure opens the check valve.

Hydraulic fluid is free to travel the path of least resistance.

PUMP RETURN

As the synchronizing cylinder extends fluid is forced into the room cylinders causing them to retract.

SYNCHRONIZING CYLINDER

ROOM CYLINDER

ROOM CYLINDER

ROOM MANIFOLD

PUMP RETURN

T H E E N D