If the boom shown in the illustration can be raised, but not lowered, the problem is most likely with the "Topping Circuit" ________. See illustration GS-0161.
A
hydraulic pump
B
linear actuator controlling boom angle
C
counterbalance valve
D
counterbalance valve, ball check , failed to close
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Question 1 / 205eccef9cbacbc34ba4d459ed
Question 1 of 205eccef9cbacbc34ba4d459ed
If the boom shown in the illustration can be raised, but not lowered, the problem is most likely with the "Topping Circuit" ________. See illustration GS-0161.
If the boom shown in the illustration can be raised, but not lowered, the problem is most likely with the "Topping Circuit" ________. See illustration GS-0161.