Troubleshooting FAQ

Problems and solutions

This symptom-based troubleshooting guide can help fix common problems with your product. If, after completing this guide, your problem still exists, please contact us, we will be glade to assist you.

Vacuum pump (blower)

Pump is running but did not produce enough CFM (cubic feet of air).

  1. Check the speed of the blower, you obtain maximum CFM at 1975 rpm.
  2. Your hoses are damaged or clogged. Repair or clean them.
  3. The doors, pipes or valves on your equipment have leaking seals. Check all gaskets and replace as necessary. Also check the 12 inch rubber coupling.
  4. The baghouse filters are clogged. Check if the cleaning system is working. Clean or replace filters. Drain air tank, check if the air pressure is sufficient
  5. Cartridge filter is clogged. Clean or replace it.
  6. Blower lobe wear or timing problems. Raise the tank, close the inlet slowly by sliding a square plate across the opening. At this point, if developed vacuum is inadequate, the blower is not working properly. Refer to competent repair facilities.

When in dry mode

Lump material enters hose but does not flow to truck.

Material is too heavy to be conveyed on existing air volume or the lumps are too large for the hose diameter in use. Use larger hose, if possible.

Generally, the hose diameter should be more than three times the maximum lump size handled. For heavy materials, a larger hose diameter provides more efficient pneumatic conveying and also can handle higher blower speed for additional carrier air volume.

Air volume (suction) at pick-up point drops.

  1. Your hose is clogged at some point, clean it.
  2. Your rubber hose have collapse under vacuum. You have exceeded the hose temperature limit, or your hose is worn out by work. Change the hose.
  3. Hose has split or come apart at some point, fix it.

Dust plume through blower (silencer) exhaust.

  1. The filter cartridge is clogged, dust is breaking through it. Clean or replace it.
  2. The baghouse filters are clogged, dust is breaking through it. Clean (activate air cleaning system) or replace it.
  3. Overloaded and plugged cyclone section resulting in excessive carryover and overloading in the baghouses. Dump truck and check for material build-up. Clean out build up as necessary.
  4. Defective or improperly installed filter bags. Open the baghouse access doors on top of the unit and inspect for dust build-up. A single defective bag can be detected by observing build-up immediately around it. Remove and replace the bag.
  5. Excessive blower speed for job requirement creates dust carry-over through the filters. Reduce blower speed.
  6. Residual dust can blow through the unit during initial operation (with new bags). This blow-by should be a short term situation (15 to 30 min.)

When in wet mode

Liquid carry-over into bag house

  1. Failure of primary separator, empty the tank and check gasket.
  2. Vacuum speed is too high.
  3. Cyclone section ia overfilled.

Cyclone compartment is full of liquid but debris tank is not.

The velocity in the pick-up hose are too high, the liquid stay in the flow of air through the debris tank and is collected only in cyclone. Reduce blower speed.

Cartridge filter is wet.

  1. The velocity in the pick-up hose is too high, some of the liquid stay in the flow of air through all the compartments.
  2. All the compartment (debris tank and cyclone) are full of liquid. Liquid is now at cartridge filter. The primary separator has failed, check the gasket.


Hose is collapsing and/or melting

  1. You have exceeded the hose temperature limit. The material being collected is too hot, allow more air in the hose for cooling or change for another type of hose.
  2. Your hose is worn out by work , it is less effective against vacuum. Allow more air in the hose when picking up material, the vacuum will be lower and the hose will sustain it. If this failed, change for a new hose.

Some hose in a multiple hose hookup is blocking

All multiple hoses should be the same length.

Low air volume in one hose of a multiple hose hookup.

  1. All multiple hoses should be the same length.
  2. Check hose for blockage.


Excessive blower discharge noise

Silencer defects. Check for hole and/or leaks. Replace the silencer if it sounds deadening material has hardened or disintegrated.


High noise level

  1. Hose sized incorrectly for the job which overloads the vacuum system. Reduce blower speed and/or increase hose size.
  2. If a hard knocking noise come from the pump, the blower is overheating. If it is happening, stop blowing immediately, wait until the blower cools off.