CONVERTER AR-TRQ 0R4084 - Caterpillar

Tilt Left Position
When the control lever moves valve spool (4) to the TILT LEFT position, the pump oil in passages (1) and (3) can not go to passage (2) and to the tank.When passages (1) and (3) are closed to passage (2) the pump oil gets an increase in pressure. The increase of the oil pressure in passage (6) opens check valve (7) and the oil goes through the check valve to passage (9) to the rod end of the tilt cylinder. The pump oil in the rod end moves the rod into the cylinder which moves the right side of the bulldozer up.The oil from the head end of the tilt cylinder goes through passage (10) and through passage (5) to the filter and tank.The location of the relief valve for the valve section to tilt the bulldozer is in the inlet section of the control assembly.Angle Right Position
The oil flow through this valve section, when valve spool (4) is in ANGLE RIGHT position, is the same as the oil flow through the other valve section in TILT LEFT position. The oil flow through passage (9) goes to the head end of the left side cylinder.The pump oil to the head end moves the rod out and the oil from the rod end of the left side cylinder goes to the rod end of the right side cylinder which moves the rod into the cylinder. The rod of the left side cylinder moves out and the rod on the right side cylinder moves in at the same time. This turns the bulldozer on the angling frame for ANGLE RIGHT. The oil from the head end of the right side cylinder goes through passage (10), through passage (5) and to the filter and tank.Makeup Valve
Valve (Makeup)
(1) Spring. (2) Passage [head ends (lift cylinders)]. (3) Valve (closed position). (4) Valve (open position).The makeup valve is in the control valve section for lift. The makeup valve is in passage (2) to the head ends of the lift cylinders. There is also a makeup valve in the control valve section for the ripper (see Ripper Hydraulics).Spring (1) and oil pressure in the spring chamber hold the valve closed. The valve opens only when the flow of pump oil to the head ends of the lift cylinders is not enough when the control valve spool is in either the FLOAT or LOWER position. When the flow of oil to the head ends of the cylinders is not enough, the pressure of the oil in passage (2) is low. The higher pressure of the oil in the passage to the tank opens the valve and lets more oil go to the head ends of the cylinders.Main Relief Valve
Valve (Relief) (Cross Section)
(1) Passage (spring chamber). (2) Valve. (3) Spring. (4) Passage (tank). (5) Valve (pilot). (6) Spring. (7) Screw (adjustment). (8) Locknuts.The main implement relief valve is installed in the inlet manifold of the implement control valve group. Its purpose is to protect the