Doosan 10/215HA, Operation & Maintenance Manual

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28 ENGINE INSTRUCTION MANUAL
9/235HA, 10/215HA
Fuel filter/separator element change
Fig. 13
Unscrew the element ‘A’ from the head taking care not to spill fuel
inside the machine. Remove fuel sensor (where fitted) and re-fit to new
filter element.
Discard the old element into a suitable container.
Using a clean cloth, wipe the sealing face of the filter/separator head
to ensure correct seating of the sealing ring.
Fill the element/bowl assembly with clean fuel oil then apply a light coat
of clean engine oil to the new element seal ring.
Screw the new element onto the head firmly by hand.
The engine has a self priming system that purges air from the fuel
system.
AIR INTAKE SYSTEM
Air cleaner
Engine performance and life vary with the air intake conditions.
A dirty air cleaner element reduces the amount of intake air, causing
reduced engine output and possible engine damage.
Also, a damaged element leads to abrasion of cylinders and valves,
resulting in increased oil consumption, reduced output and shortened
engine life.
The filter element should be changed at 500 hours or 6 months,
whichever comes first, or sooner if the restriction indicator shows red.
See below:
Fig. 14
A. Normal
B. Clogged
C. Indicator
D. Red signal
Air cleaner with dust indicator
This indicator is attached to the air cleaner. When the air cleaner
element is clogged, air intake resistance becomes greater and the dust
indicator signal turns to red indicating the element needs to be
changed.
When the signal turns to red, replace the element. Then press the dust
indicator button to reset the indication.
Air intake piping
Inspect air intake and charge air cooling pipes and connections for
damage or loose fitting. Replace or re-fit as necessary.
Fig. 15
ENGINE ELECTRICAL
The engine uses a 24 volt system and a negative grounding for the
electrical system.
Battery servicing
Battery Terminal Connections:
Check the battery cable connections for looseness or corrosion. Poor
cable connections will result in difficult engine starting or insufficient
battery charge
The battery cables must be tightened securely.
Never reverse “+” and “-” terminals when reconnecting cables after
removal. Even a short period of reverse connection will damage the
electrical parts.
Cleaning of battery
When the battery terminals are fouled clean them with clean tepid
water and wipe with a dry cloth to remove the water. Apply a light coat
of vaseline or a grease.
Alternator servicing
The polarity of the alternator is negative (-) grounding type.
Do not reverse the polarity connection, otherwise a short circuit will
occur resulting in alternator failure.
Do not put water directly on the alternator. Entry of water into the
alternator creates electrolytic corrosion causing failure.
When the battery is charged from an external source, be sure to
disconnect the battery cables.
Wiring connections
Check all of the electric wiring connections for looseness and damage
on a regular basis.
SERVICE AND MAINTENANCE
Please refer to the engine maintenance schedule.
For continued trouble free engine operation throughout its life, the
service procedures marked with an asterisk (*) need to be carried out
by a skilled and trained technician.
Please consult your local Doosan branch or dealer when these
procedures become due.
Please also read the note refering to the service items marked with the
star
symbol.
NOTE: The cartridge and bowl contain fuel. Take care not to spill
it during disassembly and reassembly.