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Construction Machine · Komatsu

Komatsu D65 Dozer Tuning and Power Upgrade

The Komatsu D65 is Komatsu's crawler dozer. The engine control unit (ECU) software is recalibrated on the machine's own original file; the original software is backed up.

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Komatsu D65 power remap

A power remap on the Komatsu D65 recalibrates the fuel quantity, injection timing, boost pressure and torque limiter maps. On a dozer the work is pure tractive effort; with more torque in reserve, rpm drops less when pushing a full blade and ripping. The calibration respects the limits of the engine and the drivetrain.

Komatsu D65 DPF, EGR and AdBlue fault solution

Dozers work long hours in dust; with a blocked particulate filter (DPF), an EGR fault or a NOx sensor fault in the AdBlue (SCR) system the machine enters limp mode and work on site stops. The cause is diagnosed first; the software solution is applied according to the ECU type.

Komatsu D65 DPF Fault SolutionKomatsu D65 EGR Fault SolutionKomatsu D65 AdBlue Fault Solution
Construction Machine DPF Fault SolutionConstruction Machine EGR Fault SolutionConstruction Machine AdBlue Fault Solution

ECU and compatibility for the Komatsu D65

Services with a verified solution for Komatsu in our library: Stage 1 Remap, DPF Delete, EGR Delete and AdBlue / SCR Delete. The same model can carry a different ECU depending on build year and engine option, so we confirm compatibility for the Komatsu D65 from a photo of the ECU label or from the file read out.

Where is the difference noticed on the Komatsu D65?

  • Long pushes with a full blade
  • Ripping hard ground
  • On slopes and soft ground

Services available for Komatsu (dozer)

Stage 1 Remap

Software that optimises the engine's power and torque maps within safe limits.

DPF Delete

Software deactivation of the diesel particulate filter (DPF/FAP) functions and fault codes.

EGR Delete

Software deactivation of the exhaust gas recirculation (EGR) valve control and fault codes.

AdBlue / SCR Delete

Software deactivation of the AdBlue/SCR dosing system and its fault/warning functions.

Frequently asked questions

Which software services are available for the Komatsu D65?
Services with a verified solution for Komatsu in our library: Stage 1 Remap, DPF Delete, EGR Delete and AdBlue / SCR Delete. We confirm on the file which of them apply to the ECU fitted to your Komatsu D65.
How much power does the Komatsu D65 gain with a remap?
The gain depends on the engine option, the ECU type and the machine's power level within its range. Rather than quote a fixed figure, we read the original file first and tell you what increase is possible.
How do I find out which ECU my Komatsu D65 has?
The exact type is read from the label on the ECU or with a diagnostic tool. A photo of the label and the model year of the machine are enough.
How long does the job take, and can it be done on site?
Most ECUs are read and written through the diagnostic socket and the job is completed the same day; some units are removed and worked on the bench. Contact us for on-site service.
Can the original software be restored?
Yes. The original software is archived and the Komatsu D65 can be returned to its factory setting on request.
Why does the machine cut power when there is an AdBlue fault?
When the emission system detects a fault, the ECU first gives a warning; if the fault is not fixed it limits torque and engine speed in stages, and at the final stage the machine runs at idle only. This is how the system is designed to behave. Power returns once the cause is fixed or a software solution matching the ECU type is applied.
Why does DPF regeneration not complete in the field or on site?
Regeneration needs the exhaust temperature to stay high for a while; low load, idling and short work cycles do not provide that. Faults in the differential pressure sensor, the EGR or the injectors also stop regeneration. The soot load and sensor values are read first; depending on the cause we recommend a forced regeneration, cleaning or a software solution.
Does the EGR job give the machine more power?
The EGR job is not a power remap; no power gain should be expected from it alone. Because the loss of pull and the power reduction caused by a faulty EGR disappear, the machine returns to its factory output. If more power is wanted, a power remap is applied separately.

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