EDGE 9R0179 - Caterpillar

One-Way Flow from One Pump
Illustration 8 g06263342
Ball Valve in One-Way Flow Position (direct return to tank is open)
(20) Attachment pressure sensor (left)
(21) Attachment pressure sensor (right)
(22) Ball valveWhen one-way flow mode is selected, set ball valve (22) to open I position by hand. This mode setting will manually bypass the return oil around the main control valve and directly to the cooler. This bypass will result in an increase of efficiency of the work tool by reducing the resistance of sending return oil through the main control valve.
Illustration 9 g06362903
One-Way Flow from One Pump
(1) Hydraulic oil cooler
(2) Proportional reducing valve (A2 extend)
(3) Pilot pressure reducing valve
(4) Main control valve
(5) Main relief valve
(7) Line relief valve (Auxiliary 2 head end)
(8) Line relief valve (Auxiliary 2 rod end)
(11) F2 stack valve
(12) Proportional reducing valve (A2 retract)
(13) Attachment control valve (pump 2)
(14) Hydraulic lock solenoid
(15) Pump 2 output pressure sensor
(16) Pump 1 output pressure sensor
(20) Attachment pressure sensor (left)
(21) Attachment pressure sensor (right)
(22) Ball valve
(23) Filter
(24) Hydraulic tank
(25) Pump 1
(28) Pump 2When the device for activation listed in Table 1 is pushed forward, the machine ECM sends a modulated signal to proportional reducing valve (2). Proportional reducing valve (2) allows pilot oil to flow to the attachment control valve (13). Attachment control valve (13) shifts, allowing high pressure from pump 2 to flow to the work tool.Oil returning from the work tool flows through ball valve (22), filter (23), and back to the hydraulic tank.During the operation of the work tool, the oil flow for pump 1 and pump 2 is controlled by the machine ECM.One-Way Flow from Two Pump
Illustration 10 g06263342
Ball Valve in One-Way Flow Position (direct return to tank is open)
(20) Attachment pressure sensor (left)
(21) Attachment pressure sensor (right)
(22) Ball valveWhen one-way flow mode is selected, set ball valve (22) to open I position by hand. This mode setting will manually bypass the return oil around the main control valve and directly to the cooler. This bypass will result in an increase of efficiency of the work tool by reducing the resistance of sending return oil through the main control valve.
Illustration 11 g06362908
One-Way Flow from Two Pump
(1) Hydraulic oil cooler
(2) Proportional reducing valve (A2 extend)
(3) Pilot pressure reducing valve
(4) Main control valve
(5) Main relief valve
(6) Proportional reducing valve (A1 extend)
(7) Line relief valve (Auxiliary 2 head end)
(8) Line relief valve (Auxiliary 2 rod end)
(9) Line relief valve (Auxiliary 1 head end)
(10) Line relief valve (Auxiliary 1 rod end)
(11) F2 stack valve
(12) Proportional reducing valve (A2 retract)
(13) Attachment control valve (pump 2)
(14) Hydraulic lock solenoid
(15) Pump 2 output pressure sensor
(16) Pump 1 output pressure sensor
(17) Attachment control valve (pump 1)
(18) Proportional reducing valve (A1 retract)
(19) f2 stack valve
(20) Attachment pressure sensor (left)
(21) Attachment pressure sensor (right)
(22) Ball valve
(23) Filter
(24) Hydraulic tank
(25) Pump 1
(26) Pump 1 control solenoid
(27) Pump 2 control solenoid
(28) Pump 2When the device for activation listed in Table 1 is pushed forward, the machine ECM sends a modulated signal to proportional reducing valve (2) and proportional reducing valve (6). Proportional reducing valve