966m regen's every two hours

[pumkinhead]

operator complains that machine regen's every two hours, hooked up et an there are no codes, dpf soot load was at 40%, machine did a regen soot load dropped to 0 and estimated time until next regen was 30 hours. they needed the machine so gave it back to operator, got a phone call that it was regening again 2 hours later, and di the same thing the next day. not sure where to start, dpf filter was changed a few months ago. serial prefix is kjp

 

[BigWrench55]

Egr flow will effect the frequency of regeneration, so check your egr differential pressure sensor for blockage. Also check the differential pressure sensor for the dpf for blockage or leaks.

 

[pumkinhead]

Thanks

 

[funwithfuel]

Pay close attention to the tubes and hoses on the DPF psi diff'l sensor. I had one with a tiny crack, caused the thing to demand regen almost as quickly as one would finish. If possible, look at your exhaust stream full throttle, full load . See if you got an injector over fueling, check all your air intake piping as well. Make sure you're not losing measured air.

 

[John C.]

Has the engine been burning engine oil?

 

[pumkinhead]

it has not been burning engine oil, cat mechanic came out and believes its due to misinstallation of dpf filter when they installed it a few months ago, looks like the gasket was a little messed up and some of the honeycomb was broken around the edges, parts warranty and rework. hopefully that fixes it but im not convinced

 

[funwithfuel]

Might have been a reman that either didn't get cleaned or is on it's 5th install or coolant contaminated. That's the bad thing, service techs don't properly document why they were serviced, as a result, it's always a crapshoot. Thanks EPA

 

[Welder Dave]

Why not post the full serial number? It's not uncommon for Cat to have differences in the same prefix.