Dpf purge air actuator

The purge air actuator on a MX epa 10 functions in the same manner and is essentially the same part as on a Cummins. Driver side of the engine below the fuel filter is the solenoid valve with a 1/4" nylon air line feeding the valve.
Its job is to purge the fuel from the fuel supply line and the fuel doser when the dosing process for regen is completed.

Depending on your fault at hand you may have a voltage fault or a response or mechanical fault. If we know the fault we can better assist and lead you in the right direction. Without Davie this can be tough to handle......... Plus near impossible to clear the EGR derate which may already be active.

 

Sure. I get it.

Replace the valve first. You can always ohm out the windings/coil in the solenoid as it should very low resistance. If open or resistance to ground or the body it is for sure bad. Next in line would be the doser and follows the same for measuring the coil. If that doesnt clear it up you likely have a wire rub and a green wire somewhere between the DCU and the part.

Keep in mind while these parts function the same, a Cummins part will not fit as the connectors are different for Paccar. Otherwise, they are exactly the same part.

 

Hello, do you know if the location of this valve would be the same for a MX 13? Or better yet can someone tell me where it’s located on a paccar MX-13?

 

The valves are not the same as EPA10 engine. The air and fuel shutoff valves are located directly behind the hand primer pump on the right hand side of the engine fuel filtration module on the EPA 13. The top solenoid valve is the air- 1/4" air supply line- this comes direct from the dryer- make sure you have good air supply. The fuel shut off is on the bottom. Components are available separately or you can also get the assembly which includes both solenoids the manifold and the DPF fuel pressure sensor.

 

Thanks, I appreciate your help....I will take a look at those, do you know if the airline is always changed with air?

 

It runs off a regulated supply port and supplies air when the system is over 90 psi and is continous. If no air is being supplied the dryer is most probable cause.

 

Ok, that helps me, thanks again!