Doosan DX60R Shop Manual page 205

Do not loosen or remove the four bolts retaining the fuel
injection pump drive gear to the fuel injection pump hub. Do
not disassemble the fuel injection pump drive gear from the
hub. Correct fuel injection timing will be very difficult or
impossible to achieve.
The starter motor can be damaged if operated continuously
longer than 10 seconds while performing the no-load test.
Do not short-circuit the charging system between alternator
terminals IG and L. Damage to the alternator will result.
Do not connect a load between alternator terminals L and E.
Damage to the alternator will result.
Do not remove the positive (+) battery cable from alternator
terminal B while the engine is operating. Damage to the
alternator will result.
Do not turn the battery switch OFF while the engine is
operating. Damage to the alternator will result.
Do not operate the engine if the alternator is producing
unusual sounds. Damage to the alternator will result.
Engine
CAUTION
CAUTION
CAUTION
CAUTION
CAUTION
CAUTION
CAUTION
SP001693
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