Glendive, Montana
DPF Cleaning & Repair
A diesel particulate filter collects two things: soot, which regeneration burns off, and ash, which it can't. When a DPF plugs early, the filter is usually a symptom of something upstream — a leaking injector, an EGR problem, a turbo issue, too much idle time or a regen that keeps getting interrupted. Mondak diagnoses DPF restriction, failed regenerations, differential pressure faults and temperature sensor problems before recommending cleaning or replacement. Cleaning a filter without fixing the reason it loaded up often means seeing the truck back again soon.
Repair
DPF Cleaning & Repair
WHAT WE SERVICE
Work tied to the actual fault.
- DPF differential pressure and restriction testing
- Exhaust temperature sensor checks
- Regeneration history and failed-regen diagnosis
- DOC face plugging inspection
- DPF removal and cleaning coordination
- Root-cause testing of injectors, EGR and turbo
COMMON NEEDS
- DPF lamp on or soot load high
- Regens happening more often than usual
- Parked regen won't complete
- Derate with high soot-load codes
- Face-plugged DOC or oil-soaked DPF
- Pressure sensor reading that doesn't match conditions
THE MONDAK APPROACH
Diagnose first. Repair with purpose.
We separate soot problems from ash problems. Heavy soot usually traces back to the engine — fueling, air, EGR or turbo — and has to be fixed first. Ash builds up over time and is handled by cleaning. We also verify the differential pressure sensor and its lines, because a bad reading can make a clean filter look plugged.
Codes and soot load can be checked in the field. DPF removal, cleaning and related engine repairs are done at the Glendive shop.
RELEVANT EQUIPMENT & BRANDS
Brand references indicate service familiarity, not authorized dealer or factory status.
COMMON QUESTIONS
Questions about dpf cleaning & repair
GLENDIVE, MONTANA
Tell us what’s down.
Share the unit, location and symptoms. We’ll help determine the practical next step.