Rev. Date: 12/20/21
Page 10
TROUBLE SHOOTING
Note: Whenever vacuum chamber cover is off, make sure key is taken out
of the ignition switch and red positive cable is disconnected from battery.
Problem
Corrective Action
1) Gas vacuum will not start.
• Check engine oil level - (if low, unit will not start).
• Check engine fuel level.
• Make sure there is no debris in the fan chamber impeding the motion of the fan.
• Battery is low or dead. Manually start vacuum with rewind starter (Only
on Briggs & Stratton). If vacuum runs, battery may need charged or
replaced. If the battery is ok, electric starter may need serviced. (See
engine operations manual.)
• Make sure spark plug wires are attached.
• Make sure fuel shut off valve is open.
• Verify hoses are installed and limit switches are engaged.
• Make sure spark plugs are clean and the correct plug for the appropriate
engine is used. (If engine is not running properly, refer to engine owners'
manual for proper troubleshooting.)
2) Excessive vibration.
• Make sure unit is sitting on a level surface.
• Make sure fan is properly secured to motor shaft.
• Check fan for damaged fins.
• Make sure there is no major insulation build up on the fan and in the chamber.
• Fan may be out of balance and need replaced.
• Loose bolts on fan chamber cover.
• Check belt tension, tighten if necessary
3) Loud knocking or squealing.
• Make sure fan is properly secured to motor shaft.
• Make sure there is no foreign debris or insulation build up in the fan chamber.
• Belt may be loose.
4) Gas vacuum loses horsepower.
• Make sure there is no debris in fuel tank and fuel filter. Clean or replace.
• Make sure there is no major insulation build up on the fan and in chamber.
• Make sure air filter is clean, replace if necessary.
• Check belt tension, tighten if necessary
5) Gas vacuum engine is stalling,
• Check engine fuel level - (Low fuel or no fuel).
smoking, or running irregularly.
• Make sure fuel shut off is completely open.
• Make sure gas vacuum is setting on level ground.
• Improper fuel may have been used.
Use lead free gasoline with a
minimum of 85 octane. Do not use gasoline which contains Methanol.
This will deteriorate the fuel line. Refer to owners manual.
•
Check for corrosion, build up, or foreign debris lodged in the float, pin, or seat.
• Make sure engine oil level is not overfilled.
• Make sure air filter is clean, replace if necessary.
T
rouble
S
hooting