Many free PDFs online are for the QSX15 or older QSK60 (Mechanical) pre-2005 models. Using the wrong manual for a Common Rail engine will cause severe damage.

portal, though many sections are available through technical documentation libraries. Core Maintenance Schedule

| Problem | Symptom | Field Fix (Not in the basic manual) | | :--- | :--- | :--- | | | Coolant loss with no external leak. White steam from crankcase breather. | Use Cummins CC2602 coolant conditioner at double the standard dose for the first 500 hrs after liner replacement. | | Turbocharger VGT Ring Sticking (Tier 4 only) | Overboost at low RPM, then derate. | Manually cycle the VGT actuator with Insite software weekly during low-load operation (e.g., shovel standby). | | High-Pressure Fuel Pump (HPFP) Seizure | Sudden engine stop. Metal flakes in fuel filter. | Install a 10-micron absolute pre-filter before the factory 30-micron filter. Cummins will not void warranty if flow rate is maintained. |