Volvo D13 Air Compressor Unloader Valve

Page service bulletin 2 2007 215 46 5 25 8 w2006005 loosen the clamps and remove the main fresh air pipe clamp from the air compressor fresh air hose the air filter.

Volvo d13 air compressor unloader valve.

Plug the compressor back in. If your electrically powered air compressor is having a hard time starting try pulling the power cord and opening the drain valve to void all air from the tank. My air compressor is leaking coolant internally externally. About product and suppliers.

The air compressor unloader valve vents trapped air. Volvo trucks north america d date group no. As the system reservoir air pressure drops the force exerted by the air pressure on the piston will be reduced and the governor spring will push the piston down. This will effectively emulate the operation of the unloader valve as any air trapped over the piston will flow into the tank as the tank pressure drops.

What the unloader valve does is that is responds to the compressor pressure switch turning the power off to the motor and allows any air that may be trapped over the piston or pistons on a multi cylinder air compressor to vent to atmosphere removing any load that the trapped air may have. Reservoir air flows around the inlet valve through the passage in the piston and out through the unloader port 2 to the compressor unloading mechanism. 2009 international prostar purges air every 15 seconds already replaced governor purge valve air compressor head for the unloader valve and a new signal line from governor to the air compressor. In some cases the air compressor may have a cracked head or develop a hole in the cylinder wall.

Volvo 2014 d13 it says air dryer malfunction on dashboard i have replaced air dryer assembly.