Airlock Seal Replacement

The purpose of the airlock seal is to trap air and fiber until it rotates 180° to the 6 o’ clock position. At this point, fiber is pushed out of the chamber by air from the blower. Worn or damaged seals allow air and fiber to escape back into the hopper, thus reducing production and coverage. When it is necessary to replace seals, follow these directions:

  1. Remove the hopper from the base unit.
  2. Check the airlock rotator plates for damage (to see if they are bent). If damaged, the entire airlock will need to be replaced (refer to airlock replacement below).
  3. Take out the rubber seal by removing the three plate fastening bolts and top plate.
  4. Install the new seal. The seal should be inserted right against the rotor plate, pressing the lower tabs of the seal down under the adjustment seal with a flathead screwdriver. Before tightening the bolts, make sure all bolt holes are aligned while the side of the seal is equally pressed against the end plate. The seal should be bent backwards for counterclockwise rotation.

NOTE: If the top plates are slightly bent,

Airlock Replacement

  1. Remove the chain guard, chain, and hose from the airlock.
  2. Lay the machine down and remove the bottom guard bolts (2) that secure the airlock to the machine. Take off electrical connections and unhook the gear motor wires.
  3. Remove the airlock from the machine.
  4. Remove the top plate and seal from the rotor. Check the seal top plate for wear and/or damage.
  5. Remove the gear motor and bearings from the old airlock.
  6. Install the gear motor and bearings on the new airlock. Tighten the set screws on the locking collar of the bearings.
  7. Install the seal and top plate. As the seal and top plate are installed, press the bottom tab of the seal under the adjacent with a flathead screwdriver.
  8. Install the weather stripping on the top outer edge of the airlock.
  9. Place the airlock back into the machine and reattach with bolts. Reinstall the chain and sprocket.

NOTE: When inserting the airlock back into the machine, make sure the back lip of the airlock slides into the airlock track, then fasten the bolts. Also, make sure the slide gate is in the slide gate track.

NOTE: Make sure the seal and top plate are assembled on the correct side of the rotor plate before assembling in the airlock. The seal should press backward towards the top plate when installed correctly into the airlock chamber. The airlock runs counterclockwise viewing it from the sprocket drive shaft. (Illustration B) Caution: If installed improperly, damage to the seals will result and put undue stress on the agitator motor. This causes overheating and poor production. The seal should be bent backwards to allow for a counterclockwise rotation of the rotor.

General Machine Maintenance

Preventative machine maintenance will add years of life to your insulation equipment.

  • Keep your machine clean! Most problems occur due to poor cleanliness.
  • After each use, remove the leftover fiber from the hopper and blow out the hose.
  • Underneath the machine should be checked and cleaned out often to remove any fiber or debris accumulation.
  • During operation, keep the material from accumulating on the blower filter. Always keep the filter in place while operating the machine. Blower filter life can be extended by occasionally removing and blowing through the filter with compressed air. The filter should be checked daily and replaced periodically depending on use.
  • Periodically turn the machine on its side and vacuum any material that has accumulated around the blower motor. Blow out any remaining debris around the motor and intake orifice of the fan with compressed air. This will extend the life of the blower significantly.
  • Keep foreign objects from falling into the hopper. This is absolutely critical to prevent damage to the machine, seals, or hoses.
  • Airlock seal and remote cords should be checked on a weekly basis.
  • Replace the airlock seals annually.
  • Motor, electrical components, and chains should be checked monthly.
  • DO NOT lubricate the chain. It is lubricated at the factory. Further lubrication will only cause it to wear faster as the chain will attract dust and grit.
  • Every few months, check all hoses and connections for leaks or tears.
  • Utilize a maintenance log to keep track of when maintenance has been performed.


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