The direction and rate of rotation for the...

The direction and rate of rotation for the...

Question 1 of 270705eccef9cbacbc34ba4d459f5

The direction and rate of rotation for the cab in the hydraulic crane circuit shown, is controlled by the __________. See illustration GS-0161.

Question 1 of 27070

Q

The direction and rate of rotation for the cab in the hydraulic crane circuit shown, is controlled by the __________. See illustration GS-0161.

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🔍 Key Concepts

• Trace the hydraulic flow from the operator’s control lever to the slew (cab rotation) motor at item #3 • Distinguish between components that create flow/pressure (pumps) and those that direct or meter that flow (valves) • Identify which labeled item actually changes both direction of flow to the motor ports (K and L) and amount of flow reaching it

💭 Think About

• Which component in the slewing circuit is directly connected to the two lines marked K and L going to the rotation motor at item #3, and reverses which port is pressurized? • Look at the operator’s interface: when the operator wants to rotate faster or slower, which specific item does their hand movement change—the pump itself, or a valve that sends more or less flow to the motor? • Compare the symbols for items #1, #3, #10, and #13: which one is shown as a directional control element that also allows variable flow to the slewing motor?

✅ Before You Answer

• Verify which item symbol is a directional control valve located in the slewing (cab rotation) section on the left of the diagram • Confirm which item is the main system pump (feeding several valves) rather than dedicated only to cab rotation • Check whether the operator’s control linkage for slewing is labeled with or tied to the same item number that both reverses flow and throttles it to control speed