Damaged or Missing Vac Valve.

The Filter Guys

The Vacuator™ Valve, a standard item on most Donaldson air cleaners, is an important part of the functionality of the air cleaner during the pre-cleaning stage.

If your Vac Valve is cracked, torn, missing or remains open, dust particles that are normally expelled can deposit themselves onto the filter and will significantly shorten the filter service life. It will need replacing.

For proper operation, the valve should be located at the lowest point on the air cleaner or with the dust cup pointing down. Normal engine pulsing and operation causes the Vacuator™ Valve to open and close. This action automatically expels any collected dust and water. The valve also releases its load when the engine is stopped.

Call Sterling Filtration for more information about this product.