If the operating pressure is determined to...

Study

Question 1 of 2066636eee28f7522a1c51eebc

If the operating pressure is determined to be normal in the system shown in the illustration, yet the crane does not swing (slew) in either direction when the directional control valve is operated, the problem could be ________. Illustration GS-0161

Back

Question 1 of 20

66636eee28f7522a1c51eebc

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

• Trace the slew/swing circuit from the directional control valve to the swing motor and brake release cylinder. • Effect of a double check valve with its ball stuck to one side on flow direction and motor rotation. • Relationship between brake release pressure and motor movement when system pressure is otherwise normal.

💭 Think About

• When you shift the swing directional control valve, where should pressure go first, and what components must change state before the crane can actually swing? • If system pressure is normal and other crane motions work, which listed faults would prevent only swinging in both directions, without lowering overall pressure? • How would a blockage in the brake release line affect the brake, even though the pump is still making normal pressure?

✅ Before You Answer

• Verify which component in the swing circuit actually releases the mechanical brake before the motor can turn. • Confirm on the diagram which line is labeled as the brake release cylinder line (2) and what happens if it is obstructed. • Check whether a jammed double check valve (14) or a mis-set relief valve (12) would stop movement in both directions while still showing normal operating pressure.

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed