1. GENERAL INFORMATION
1.1 General Repair Instructions
1. Before performing service operation, disconnect the grounding cable from the battery for reducing the
chance of cable damage and burning due to short-circuiting.
2. Use covers for preventing the components from damage or pollution.
3. Engine oil and anti-freeze solution must be handled with reasonable care as they cause paint damage.
4. The use of proper tools and special tools where specified is important to efficient and reliable service
operation.
5. Use genuine DOOSAN parts necessarily.
6. Used cotter pins, gaskets, O-rings, oil seals, lock washer and self-lock nuts should be discarded and
new ones should be prepared for installation as normal function of the parts cannot be maintained if
these parts are reused.
7. To facilitate proper and smooth reassemble operation, keep disassembled parts neatly in groups.
Keeping fixing bolts and nut separate is very important as they vary in hardness and design depending
on position of installation.
8. Clean the parts before inspection or reassembly. Also clean oil ports, etc. using compressed air to
make certain they are free from restrictions.
9. Lubricate rotating and sliding faces of parts with oil or grease before installation.
10. When necessary, use a sealer on gaskets to prevent leakage.
11. Carefully observe all specifications for bolts and nuts torques.
12. When service operation is completed, make a final check to be sure service has been done property.
1.2 Engine Specific Character
1.2.1 Toroidal combustion mode
The basic structure of toroidal combustion chamber tha combustion chamber on the center of piston
head, and the cylinder head has a swirl path. During intake stroke, a large amount of intake air
generates strong swirl in the combustion chamber; and during compression stroke, it provides a strong
air flow through piston configuration, facilitating the mixture of air and fuel. The engine of torodial
comvustion type is silent, ensuring safe operation, multi-purpose applications, reduced comsumption of
fuel and oil.
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