The Daily Maintenance Of The WD305 Series Diesel Engine

- Nov 23, 2017-

Correct maintenance of diesel engine, especially preventive maintenance, though it is the easiest and most economical, it is the key of prolonging service life time of diesel engine and decreasing its operation cost. First of all, daily records of the engine operation should be well made so that necessary adjustments and regulation can be performed accordingly. In addition to the daily records, users should refer to the instructions in this section and work out their own particular maintenance schedule in terms of their specific operating condition and experience.

Generally, the contents of daily records include:

Date, beginning time and end time of every shift. Routine record of readings on all meters. Load of the engine. Leakage and excessive consumption of fuel, lubricating oil and cooling water. Exhaust color and abnormal noise. Problems and solutions.


For reliable engine operation, all maintenance work must be carried out promptly, carefully and correctly. Must carry out diesel engine technology maintenance system, technical maintenance category below:

Daily maintenance (after every work-shift)

First order maintenance (after every100 accumulated operating hours).

Second order maintenance (after every500 accumulated operating hours)

Third order maintenance (after every1000-1500 accumulated operating hours or every 1 years).


No matter what kind of maintenance is carried out, the dismantling, checking and reassembling should always be done in a planned and sequential way. Be sure to use suitable tools and exert proper strength. After dismantling, the surfaces exposed must be kept clean and coated with anti-rusting oil or grease to prevent them from rusting. Take care of the relative positions of the detectable parts, the structural features of the parts which can not be dismantled, the fit clearances and the adjusting methods. At the same time, keep the engine and its accessories clean and complete.


Daily maintenance:

1. Check lubricating oil level in engine sump. Oil level should meet the marks indicated on the oil level scale. If insufficient, replenish to the specified limit.

2. Check oil, water and gas leakage.

3. Check rigidity and reliability of all components attached to the engine. Check rigidity and reliability of engine foundation bolts and the connection between the engine and the driven machinery.

4. Check all the meters to see whether the readings are normal. If abnormal, replace or repair it.

5. Check injection pump connecting plate. If there is any alteration of injection timing or the joint bolts are loose, check the injection timing and tighten the bolts.

6. Check the connecting screw between turbocharger and its bracket and bust of connection between turbocharger and air inlet pipe to see whether they are loose.

7. Clean the engine and the surface of the attachment. Oil, water and dust gathered on the engine surface, turbocharger, cylinder head cover and air filter can be wiped clean with a dry rag or cloth dipped in a bit of diesel. Clean off the dust gathered on the charging alternator, radiator, intercooler and fan by wiping or blowing with compressed air.