FAQ - Service

Below are questions relating to maintenance and service of engines which use EGR, DOC and SCR systems to comply with Stage IV :

DOC System

Will there be any change to service and maintenance procedures for Stage IIIB and Stage IV compliant engines?

No specific service needed for the DOC system. Bear in mind that the use of high Suplhur fuel (>10 ppm) will damage the DOC catalyst beyond repair.

SCR System

Will there be any change to service and maintenance procedures for Stage IIIB and Stage IV compliant engines?

This type of engine needs a change of the AdBlue® circuit filter every 3000 operating hours.

What is the ratio between AdBlue® and fuel?

On average, the engine consumes 5 to 7 % of AdBlue® in relation to fuel consumption. Actual consumption, however, is highly dependent on working conditions.

What happens if I run out of AdBlue®?

The system gives a warning if the level of AdBlue® in the AdBlue® tank is too low. According to legislation, it is not allowed to run the machine without Adblue®, as the engine would not be able to meet the emissions regulations. If the tank is empty, the engine torque is reduced.

Where can I find AdBlue® and how is it used?

SCR technology is already used in on-highway trucks and passenger cars for a considerable period of time. The AdBlue® additive can be found locally and is typically available at service stations.

Do I have to use special engine oil?

The engine oil must fulfill the following quality requirements : ACEA E9 (E9 requires fuel with a low SAPS content) or API CJ-4 classification. ”SAPS” stands for “Sulphated Ash, Phosphorus and Sulphur”.

Is there any change in the life expectancy of the Stage IIIB or Stage IV engine?

There is no change in life expectancy of Stage IIIB or Stage IV engines.

EGR + DPF System

How often does the DPF need to be serviced?

According to the recommendation in the Operation Manual, the first cleaning is after 4500 hours and thereafter every 3000 hours. This interval can be less, depending on working conditions, application, quality of fuel, etc.

Will there be any change to service and maintenance procedures for Stage IIIB compliant engines?

In addition to the standard maintenance items, the DPF maintenance needs to be performed according to the Machine Workshop Manual.

Can I service the DPF myself without voiding the warranty?

Only an authorized Doosan dealer can service the DPF system. Your Doosan dealer is aware of all legal requirements that apply to DPF cleaning.

Can I run the machine without the DPF filter?

According to the legislation, it is not allowed to run the machine without the DPF filter, since the engine would not be able to meet the emissions regulations.

Is there any service exchange program covering the DPF?

Yes, Doosan has a DPF Cleaning program.

The purpose of the Doosan DPF CLEANING PROGRAM is to extend the lifetime of filters and save significant costs for dealers and customers by professionally cleaning used DPFs. To clean used DPFs, Doosan has a partnership agreement with an international leader in cleaning DPFs.

How long is a machine down for a DPF change?

A DPF replacement typically takes from half an hour to 2 hours, depending on the machine model. Please contact your Doosan dealer if you require a DPF change.

Do I have to use special engine oil?

The engine oil must fulfill the following quality requirements : ACEA E9 (E9 requires fuel with a low SAPS content) or API CJ-4 classification. ”SAPS” stands for “Sulphated Ash, Phosphorus and Sulphur”.

Is there any change in the life expectancy of the Stage IIIB engine?

There is no change in life expectancy of Stage IIIB engines.