Question 366General Subjects - QMED70% to pass
The hydraulic system of a deck winch has been drained, flushed, and refilled with hydraulic fluid. An erratic knocking noise from the hydraulic motor when the winch is started would indicate _______________.
AI Explanation
The correct answer is C) air trapped in the system.
When the hydraulic system of a deck winch has been drained, flushed, and refilled with hydraulic fluid, an erratic knocking noise from the hydraulic motor when the winch is started indicates the presence of air trapped in the system. Air trapped in the hydraulic lines can cause cavitation and erratic operation of the hydraulic motor, leading to the observed knocking noise.
The other options are incorrect because:
A) A high fluid level in the reservoir would not cause a knocking noise.
B) Clogged suction line filters would restrict flow, but not necessarily cause a knocking noise.
D) Abrasive matter circulating in the oil would cause wear and tear, but not necessarily a knocking noise.
Related Questions
#364 In the hydraulic anchor windlass system illustrated, if the power to the electric motor is on, but the wildcat does not turn, the pressure developed on either side of the system increases to half of the normal operating pressure regardless of the direction of movement in which the servo control is placed, the probable cause is the _______________. Illustration GS-0160 #365 In the hydraulic anchor windlass system illustrated, the main pressure relief valve opens as the load increases its strain on the system. The probable cause is the _______________. Illustration GS-0160 #367 Which problems can occur if the brake band lining of a wildcat brake becomes excessively worn? #368 Overheating of the hydraulic fluid in an electro-hydraulic anchor windlass can result from a/an _______________.