If a hydraulic governor has been refilled with oil, the engine should be operated until it reaches normal temperaturethen the air should be purged, and the（）<br>A:rack position should be adjusted<br>B:compensating needle valve should be opened fully compensating<br>C:needle valve should be adjusted to stabilize operation<br>D:speed limiting device should be adjusted

If a hydraulic governor has been refilled with oil, the engine should be operated until it reaches normal temperaturethen the air should be purged, and the（）
A:rack position should be adjusted
B:compensating needle valve should be opened fully compensating
C:needle valve should be adjusted to stabilize operation
D:speed limiting device should be adjusted

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