SUPPORT 4W6084 - Caterpillar

Illustration 1 g03812379
Right Side of Machine
(1) Pump
(2) Forward control solenoid
(3) Port "FE"
(4) Port "A"
(5) Port "B"
(6) Port "T1"
(7) Reverse control solenoid Emulsion spray pump (1) is located in the pump stack under a hinged deck plate on the right side of the cab. The deck plate must be open to access this component.Emulsion spray pump (1) is connected to the pump for the water spray system. The emulsion pump is splined to the right propel pump. The pump for the emulsion spray system and the water spray pump are functionally identical.Note: On single pump arrangements when no water pump is present, emulsion spray pump (1) is splined to the right propel pump.Emulsion spray pump (1) is an axial piston pump with a variable displacement. The pump contains an integral charge pump. The pump and the internal charge pump rotate when the engine is running. The angle of the swashplate in the emulsion spray system pump determines the amount of flow that the pump generates. The charge pump is a positive-displacement pump. The speed of the engine determines the amount of flow that the charge pump generates. Each port on emulsion spray pump (1) pump housing is identified by a numeric or an alpha-numeric designation. These designations are cast into the housing next to the port. The function of each port is as follows:
Port "FE" (3) is the charge outlet port. Oil is directed out this port to an external charge filter and then returned to the pump.
Port "A" (4) is a system port. Port "A" is connected to the forward port of the emulsion spray motor.
Port "B" (5) is a system port. Port "B" is connected to the reverse port of the emulsion spray motor.
Port "T1" (6) is the main case drain port. Case drain oil from the pump flows to the tank filter through port "T1".Emulsion spray pump (1) contains a direction control valve and servo piston. The direction control valve is equipped with proportional solenoids. The function of each solenoid is as follows:
Forward control solenoid (2) controls the flow out of port "B" of the pump.
Reverse control solenoid (7) controls the flow out of port "A" of the pump.
Illustration 2 g03812383
Emulsion Spray Pump Cross Section (ON)
(8) Feedback Linkage
(9) Directional control valve
(10) Port plate
(11) Charge pump
(12) Combination valve
(13) Servo piston
(14) Drive shaft
(15) Swashplate
(16) Slipper pad
(17) Slipper retainer
(18) Piston
(19) Directional control solenoid "B"
(20) Directional control spool
(21) Centering spring
(22) Directional control solenoid "A"
(23) Barrel assembly
(24) Combination valve
(25) Charge relief valve Engine rotation turns drive shaft (14) on the emulsion spray pump. This action rotates barrel assembly (23). Pistons (18) inside the emulsion spray pump rotate with the barrel assembly. Piston slipper pads (17) allow the pistons to follow the angle of swashplate (15). The pump only generates flow when the swashplate is not at minimum angle.When the emulsion spray system is not operating, both sides of the servo piston (13) are open to the case drain. Centering springs (21) center the servo piston, and swashplate (15) remains at minimum angle. With