All essential driving controls are brought to a single vertical control column.  Forward
movement of the column opens the throttle providing control of power from the engine.  
Returning the control column to neutral returns the throttle to idle position.  Movement of
the column to neutral returns the throttle to idle position.  Movement of the column toward
the rear applies the vehicle brakes in proportion to the pressure applied to the column.

At the top of the column is a cross arm with a mini steering wheel directly in front of the
center of the driver.  Rotation of the wheel Left or Right steers the vehicle.

All systems are amplified so that the power and range of motion required of the driver are
reduced to a minimum.  The system provides for a minimum of 6 ounces of force
required in the fore and aft and lateral planes.


For persons who do not have finger dexterity or wrist function, such as high-level spinal
cord injury, a Tri-pin device mounted at the top of the vertical column with a parallel arm
support provided.

Steering Control

The steering control is a closed loop Servo mechanism.  The loop is closed by
mechanical linkage; the linkage is adjustable to provide two ratios.  When the steering
wheel is used 270 degrees of rotation is provided.  When the tri-pin is used 180 degrees
of rotation is provided.

Power Steering

Two hydraulic power systems are provided.  The primary system is the engine driven
pump.  A separate secondary or emergency system using an electrically driven pump is
also provided which will engage automatically if the primary system fails to provide
adequate Hydraulic Flow, this provides continuous steering power.  A manual override is
also provided for the emergency system.

The Braking System

The braking system is vacuum boosted.  Reduced pressure provided by the engine
intake manifold is stored in a large tank with a check valve to assure retention of
pressure.  The control column is mechanically connected to the normal power brake
system.  In addition, a separate actuator controlled by a vacuum servo valve in the
mechanical link between the column and the primary system provides a backup booster
system.  Each system is independent of the other and either will provide adequate
braking.

Electrical Controls

All of the engine and driving controls are brought to a special control box on which light
pressure push button switches allow the driver full control of all electrical circuits
including electrical shift actuator and front window controls.  The column box can be
placed anywhere convenient to the driver and any controls needed can be duplicated at
any location.  All electrical interface controls are located in one relay box generally located
beneath the dash directly in front of the driver.  Aircraft type manual and automatic circuit
breakers are provided for all internal circuits. The fuse panel in the van (located on the fire
wall directly ahead of the driver protects the van circuits.  All electrical systems &
components are plug in modular units to make field service easier.

General Service Recommendations

Routine preventative maintenance procedures are the least expensive and most effective
insurance against unexpected mechanical failures available.

Follow faithfully the manufacturers service recommendations as outlined in the booklet
provided with each vehicle.

We recommend two exceptions as follows:

Oil change and Lubrication  

Most of the Scott systems vehicles are operated on basically shorter runs, which tends to
shorten the life of the lubricants.  Therefore, we suggest that the engine oil and filter
should be changed at 3,000 to 3,500 mile intervals.  Always have the chassis lubricated
at the time of the oil change, especially in wet weather.

Mobility system  

No routine servicing of the driving system is required except to maintain the level of oil in
the power steering fluid reservoir.  All other portions of the system have a lifetime self
lubricated and sealed bearings.  No additional services or lubrication is required.

The power steering reservoir is located under the hood at the front of the van.  It is to the
right of center facing the front of the van.