ELEMENT-ACL 3496262 - Caterpillar

Illustration 6 g03665856
Two-Way Flow from Two Pumps
(3) Variable relief solenoid valve
(5) Variable relief solenoid valve
(6) F2.2 stack valve
(8) Proportional reducing valve (Flow limit 1)
(9) Proportional reducing valve (Flow limit 2)
(13) Proportional reducing valve (A2 extend)
(14) Proportional reducing valve (A1 extend)
(19) Attachment control valve
(20) Attachment control valve
(32) Hydraulic tank
(37) Idler pump
(38) Drive pump
(39) Pilot pump
(44) Hammer filter (if equipped)
(46) Hydraulic Pedal (right) When the device for activation listed in Table 4 is pushed forward, proportional reducing valve (13) and proportional reducing valve (14) receives a modulated signal from the machine ECM. Proportional reducing valve (14) allows pilot oil to flow to attachment control valve (19). Proportional reducing valve (13) allows pilot oil to flow to attachment control valve (20). The pilot oil shifts attachment control valve (19) and attachment control valve (20 ), allowing high-pressure oil from drive pump (38) and idler pump (37) to combine and flow to the work tool. When abnormally high pressure occurs in the line to work tool, variable relief solenoid valve (3) opens at a set pressure. This opening will allow the high-pressure oil into the return system and back to the hydraulic tank. The pressure setting of variable relief solenoid valve (3) is adjustable through the monitor. Oil returning from the work tool flows back through attachment control valve (19) and attachment control valve (20) and back to the hydraulic tank.
Illustration 7 g03665860
Two-Way Flow from Two Pumps
(3) Variable relief solenoid valve
(5) Variable relief solenoid valve
(6) F2.2 stack valve
(8) Proportional reducing valve (Flow limit 1)
(9) Proportional reducing valve (Flow limit 2)
(11) Proportional reducing valve (A2 extend)
(12) Proportional reducing valve (A1 extend)
(19) Attachment control valve
(20) Attachment control valve
(32) Hydraulic tank
(37) Idler pump
(38) Drive pump
(39) Pilot pump
(44) Hammer filter (if equipped)
(45) Hydraulic pedal (left) When the device for activation shown in Table 4 is pushed forward, proportional reducing valve (11) and proportional reducing valve (12) receives a modulated signal from the machine ECM. Proportional reducing valve (12) allows pilot oil to flow to the attachment control valve (19). Proportional reducing valve (11) allows pilot oil to flow to the attachment control valve (20). The pilot oil shifts attachment control valve (19) and attachment control valve (20), allowing high-pressure oil from drive pump (38) and idler pump (37) to flow to the work tool. When abnormally high pressure occurs in the line to the work tool, variable relief solenoid valve (5) opens at a set pressure. This opening will allow the high-pressure oil into the return system and back to the hydraulic tank. The pressure setting of variable relief solenoid valve (5) is adjustable through the monitor. Oil returning from the work tool flows back through attachment control valve (19) and attachment control valve (20) and back to the hydraulic tank.During the operation of the work tool, the oil flow for both pumps is controlled by flow limit valve (8), flow limit valve (9), and the machine ECM.Medium Pressure (If Equipped)
Medium pressure is designed to provide oil to the work tool for tool rotation. An attachment valve is