SWITCH AS-ROCKER 1939056 - Caterpillar

Single Action Hydraulic Attachment Circuit
Note: For the 1XS1-UP, 7JR1-UP, 2AS1-UP, 9WS1-UP, and 5MS1-UP, refer to Schematic, SENR9270, "Single Action, Two Pump Flow (Attachment)" for the hydraulic system schematic.Note: For the 2ES1-UP and 1ZS1-UP, refer to Schematic, SENR1911, "Single Action, Two Pump Flow (Attachment)" for the hydraulic system schematic.Note: For the 6DN1-UP, 8FN1-UP, 4DS1-UP, and 5BS1-UP, refer to Schematic, SENR9296, "Single Action, Two Pump Flow (Attachment)" for the hydraulic system schematic.Note: For the 3YR1-UP, 5LR1-UP, 4RS1-UP, and 5LS1-UP, refer to Schematic, SENR1904, "Single Action, Two Pump Flow (Attachment)" for the hydraulic system schematic.The single action hydraulic attachment circuit is for attachments that require one-way flow. A hydraulic hammer is a good example. The following components are the main components of the single action hydraulic attachment circuit:
Hydraulic control
Pilot oil lines
Front lines
Attachment relief valveHydraulic Control
Illustration 1 g00295802
Components of the hydraulic control (1) Double switch (attachment speed). (2) Double switch (attachment tool). (3) Fourth pedal (option). (4) Right implement control lever. (5) Left implement control lever.To activate the single action hydraulic attachment circuit, push double switch (2) to the left. When switch (1) is pressed to the right, the hammer is changed to high speed. When switch (1) is pressed to the right again, the hammer is changed to low speed.Only the fourth pedal (3) allows modulation of the implement speed. To cause the implement to move faster, push down on the pedal more. Operation Of Pilot System
Illustration 2 g00295788
(5) Shuttle Valve. (6) Solenoid valve. (7) Auxiliary manifold. (8) Main control valve. (9) Pilot oil manifold.The hammer attachment activates by pushing double switch (2) to the left. Solenoid valve (6) of auxiliary manifold (7) opens. Pilot oil from pilot oil manifold (9) flows through auxiliary manifold (7) to the top of the attachment control valve. The fourth pedal modulates the pressure signal which is sent to the top of the attachment control valve. Shuttle valve (5) takes in pilot oil from the double switch or the fourth pedal. Shuttle valve (5) sends the highest pilot oil pressure to the top of the attachment control valve.The logic valve is located under the main control valve. The logic valve is a series of resolver valves. Pilot pressure from both sides of the boom, bucket, swing, and stick control valves enters the logic valve. The resolver valves direct the highest pilot pressure from each of the implement circuits to the top and the bottom of the attachment control valve. The pilot pressure signals at the top and the bottom of the control valve move the attachment spool assembly to the neutral position. The logic valve prevents operation of the attachment when another implement is activated. Operation Of Front Lines
Illustration 3 g00295794
(8) Main control valve. (10) Supply line to attachment. (11) Return line from attachment. (12) Relief valve.Pilot oil pressure moves the attachment valve stem which sends pump oil through line (10) . Oil returns from the attachment through line (11) . The oil pressure for the