W EEKLY EDITION MAY 15, 2019
Maintaining Pumps and Troubleshooting Issues in
Portable Sanitation Operations
By the PSAI Training Committee
Position the vacuum pump lever to "VACUUM" as labeled on the pump. Start the engine and engage
the PTO slowly. Run the engine up to the recommended rpms.
WARNING - Truck engine RPM does not necessarily match the vacuum pump rpm. Improper engine
speed can damage the pump and cause driveline failure.
Run until the recommended amount of vacuum is shown on the vacuum gauge before opening the fill
valve.
Watch the fill indicator (sight glass, sight tube or fl oat lever indicator) to see when the tank is full. When
full, close the "Fill" valve and shut down the vacuum pump by disengaging the PTO. If for any reason
you can't visually see when the tank is full, you will be able to hear a sound change in the runnin g
pump signifying the primary shut - off has been activated. WARNING – DO NOT ALLOW THE PUMP
TO RUN LONG IN THIS CONDITION. DOING SO WILL DAMAGE THE PUMP AND/OR REDUCE ITS
LIFE.
WARNING – The capacity of the tank, when filled, may exceed the weight limitati ons of the truck
chassis or the posted highway weight limits. It is the responsibility of the service technician to ensure
s/he does not fill the tank that would exceed the weight limits allowed. - END
P AGE 13
