170 Cherry Avenue
West Sayville, NY 11796
www.kussmaul.com
Ph: 800-346-0857
Fax: 631-567-5826
sales@kussmaul.com
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INTRODUCTION
The 091-9B-4 Auto-Pump Air Compressor system is a 120 volt 50/60 Hz capacitor
start A.C. motor operating a single cylinder air compressor designed specifically for
installation on vehicles with air brakes. During long idle periods of the vehicle when
even the slightest seepage can cause an air brake system pressure to drop below
the brake lockup pressure, the Auto Pump automatically starts to help maintain
operating pressure.
The Auto Pump motor is directly coupled to the compressor section eliminating all
belts and pulleys assuring long life and reliable operation. A heavy duty pressure
switch is adjusted to start the compressor when the system pressure drops below 75
psi and stops the compressor when 95 psi is attained. The start up pressure is field
adjustable - the pressure differential between start up and stopping is fixed.
A moisture trap is mounted on the Auto Pump. This helps capture condensate which
results from compressing the air.
*Moisture trap should be checked periodically and drained as necessary.
Please read and follow the installation instructions carefully. The Auto Pump requires
no routine maintenance. A careful installation will assure years of trouble free
operation.
NOTE
THIS PUMP REQUIRES A MINIMUM OF 110 VOLTS. FOR
OPERATION AT LOWER VOLTAGES THE PUMP WILL NOT START
