TUBE 3904283 - Caterpillar

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Before you change the flow mode of the hydraulic work tool circuit, place the machine in the servicing position, as shown. Stop the engine.
Make sure that all attachments are in the recommended servicing position and personnel are clear of the attachment before the manual lever on the ball valve is moved. Changing the valve position may cause the attachment to move unexpectedly. Serious injury or death may result.
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(1) Ball valve (2) Ball valve
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(1) Ball valve (A) One-way flow (B) Two-way flowBall valve (1) is located in front of the main control valve.
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(2) Ball valve (C) One-way flow (D) Two-way flowBall valve (2) is located in front of the main control valve.Use the manual lever to turn the ball valve. Make sure that you fully turn the ball valve until the ball valve stops.Never use the manual lever as a step when the manual lever is attached to the ball valve. Remove the manual lever from the ball valve after adjusting the ball valve.
Table 1
Work Tool Circuits and Valve Positions    
Ball Valve     Lever Position     One-Way Flow (Hydraulic Hammer)     Two-Way Flow (Hydraulic Shear)    
1     A     X        
B     X    
2     C     X        
D     X