4
Vacuum System Operation
and Maintenance Manual
Vacuum Compressor Operation
Belt Driven Compressor - Standard Transmission
1. Position truck at area to be cleaned.
2. Engage parking brake.
3. With clutch depressed and engine at idle speed, transmission in the neutral position, engage splitshaft only,
controls located to the right of the drivers seat.
4. Depress the clutch and shift the transmission into first gear, slowly release the clutch against the foot brake and
parking brake to ensure the rear axle is disengaged. Be sure no personnel are in front of the vehicle, during this
test only.
5. With the clutch depressed and engine at idle speed, transmission in neutral position, engage blower PTO
controls located to right of drivers seat.
6. Rear wheel chocks are optional (recommended on unlevel grades or for additional safety).
7. Put the transmission in the highest gear available.
8. Release clutch slowly to engage vacuum drive.
9. Exit cab.
10. Make sure all personnel are clear of the vacuum nozzle.
11. Slowly increase speed of blower by turning out the throttle control located on hose reel to an operating range of
2200-2500 RPM.
12. To stop compressor, turn throttle cable in until engine reaches idle speed.
13. Enter cab.
14. Depress clutch pedal, and place transmission in the neutral position.
15. Wait one to two minutes until compressor has come to a complete stop.
16. Disengage PTO and splitshaft controls.
NOTE: If you do not follow step 12 & 13 exactly as stated, damage can occur to the splitshaft/PTO arrangement.
17. Truck is now ready for transport.
LUBRICATION NOTE: All grease fittings located at the vacuum compressor
MUST
be greased at least
once a day.
