Lotem 400/800/Quantum/ThermoFlex Mid, Narrow - Dry Drum Vacuum Pump VT 4.40
Preventive Maintenance

Description

Procedure

Note: In addition to the standard tools, a 5 mm Allen key is required.

1. Remove the distribution box panel.
2. Disassemble the dry drum vacuum pump polyurethane cover by removing the two Allen screws (see Figure 1).
   
   
   Figure 1 - Dry Drum Vacuum Pump Polyurethane Cover
   
   
3. Disassemble the filter cover by removing the three 5-mm Allen screws (see Figure 2).
   
   
   Figure 2 - Filter Cover
   
   
4. Replace the used filter with a new Filter Cartridge (PN 342A10090), and dispose of the used filter (see Figure 3).
   
   
   Figure 3 - Filter Cartridge
   
   
5. To check the vacuum pump blades, remove the blades cover by opening the four Allen screws (see Figure 4).
   
   
   Figure 4
   
   
6. Pull out the seven vacuum pump blades one by one (see Figure 5).
   
   
   Figure 5 - Vacuum Pump Blades
   
   
7. Using an external air pressure hose, clean the inner areas of the vacuum pump.
8. Measure the vacuum pump blades with a caliber. The width should be greater than 27mm.
   
   
   Figure 6 - Vacuum Pump Blade Length
   
   
9. If the width of any of the vacuum pump blades is less than 27 mm, replace all the blades in the set with a new set (P/N 510K3R284).
   Important: Insert the vacuum pump blades with the curved edge fitting into the housing curve (see Figure 7).
   
   
   Figure 7
   
   
10. Secure the blades cover by tightening the four Allen screws.
11. Secure the filter cover by tightening the three 5-mm Allen screws.
12. Secure the dry vacuum pump polyurethane cover by tightening the two Allen screws.
13. Reinstall the distribution box panel.