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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. 18
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.
PERIODICAL INSPECTION AND MAINTENANCE
9/270, 9/300, 12/235, 17/235, 21/215, 9/270HA, 9/300HA, 10/300HA, 12/235HA, 17/235HA, 21/215HA
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.
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