If you suspect a leak in a dry vacuum pump, there are a few things you can do:

1. Identify the source of the leak: Use a leak detector or soapy water to locate the source of the leak.

2. Check for damaged components: Inspect the pump and its associated hoses and connections for any damage, wear, or looseness.

3. Replace damaged components: If you find any damaged parts, such as hoses or gaskets, replace them.

4. Tighten loose connections: Tighten any loose connections you find.

5. Check the oil level: Dry vacuum pumps require lubrication to function properly. Check the oil level to ensure it is not too low, as this can cause a drop in performance and potentially damage the pump.

6. Check the condition of the oil: Check the color and consistency of the oil. If it appears dirty, contaminated, or degraded, it may need to be changed.

If you are not comfortable making these repairs yourself, you should take your pump to a qualified technician. Addressing a dry vacuum pump leak is important to maintain the pump's efficiency and prevent any potential damage.