Doosan 7/41 - Page 75

ENGINE MAINTENANCE SCHEDULE 71
7/26E, 7/31E, 7/41
Note:
* This is a recommended maintenance. The failure to perform this maintenance item will not nullify the emission warranty or limit recall liability prior
to the completion engine useful life. The company, however, urges that recommended maintenance service is performed at the indicated intervals.
EXPLANATION OF MAINTENANCE SCHEDULE
The following is a brief explanation of the services listed in the preceding Engine Maintenance schedule.
1. Oil level. Check that the oil level is between the max. and the min. level marks.
Add oil to the max. level mark if it is below the min. level.
If it is above the max. level mark, drain oil until the max. level is reached.
2. Engine oil replacement Change at 500 hours or 6 months, whichever comes first.
3. Oil filter element
replacement
Change at 500 hours or 6 months, whichever comes first.
4. Fuel leakage Replace any damaged or malfunctioning parts which could cause leakage.
5. Draining water in fuel filter/
separator.
Drain off water in the fuel filter/separator bowl.
6. Fuel filter element
replacement
Replace both primary (filter/separator) and secondary elements at 500 hours or 6 months whichever come
first.
7. Injection nozzle check Check injection opening pressure and spray condition. (This is a recommended maintenance item L). Consult
your local branch or distributor.
8. Coolant level. Check coolant level and add coolant if necessary.
9. Coolant leakage check Replace any damaged or malfunctioning parts which could cause leakage.
10. Radiator filler cap fitting
condition
The radiator cap must be installed tightly and sealing correctly.
11. Fan belt tension check Check and adjust fan belt deflection. Look for cracks, fraying and wear. Replace if necessary.
12. Coolant temperature Normal running temperature is 75 to 85°C (167 to 185°F). Check and repair the cooling system if temperature
is abnormal.
13. Coolant replacement Change coolant at intervals of 1000 hours or 12 months, whichever comes first.
14. Radiator external face
cleaning
Check monthly. Clean at intervals of 250 hours or 3 months, whichever comes first. In very dusty
environments, more frequent cleaning might be necessary.
15. Cooling system circuit
cleaning
Clean at intervals of 1000 hours or 12 months, whichever comes first.
16. Radiator filling cap
function check
Check radiator pressure cap periodically for proper operation. Consult your local branch or distributor.
17. Battery electrolyte level
check
Replenish with distilled water if necessary.
18. Battery cleaning Clean the terminals
19. Battery charge condition If cranking speed is too slow to start the engine, charge the battery.
20. Air filter element
replacement
Change element at 500 hrs or sooner if the restriction indicator shows red.
21. Cylinder compression
pressure
Consult your local dealer or distributor
22. Valve clearance check Check and adjust every 1000 hours. Consult your local dealer or distributor