LINE A. 0530150 - Caterpillar

Illustration 1 g03396980
(16) Pump
(17) Transmission filter
(18) Transmission hydraulic
(19) Transmission solenoid valves
(20) Transmission cooler
(21) Sump
(22) Suction screen
(23) Torque converter
(24) Main Relief
(25) TC Inlet Relief
(26) TC Outlet Valve The transmission hydraulic system consists of the following components: suction screen (22) and magnet , transmission oil pump (16), transmission oil filter (17), transmission hydraulic control relief valve (24), clutch solenoid modulating valves (19), torque converter (23), torque converter inlet relief valve (25) and oil cooler (20).The bottom of the output transfer gear case contains oil sump Transmission oil pump is a one-section gear pump. Transmission oil pump is a positive displacement pump. Transmission oil pump supplies oil to the transmission hydraulic system by pumping oil from oil sump (21). The oil flows through the suction screen and magnet . Oil is supplied to the pump inlet through a tube that is mounted to the pump inlet and to the output transfer gear case. Pressurized oil flows from the pump outlet to externally mounted transmission oil filter . Pressurized oil flows from transmission oil filter through an external hose to the transmission case. Pressurized oil then flows through internal tubes to transmission hydraulic control relief valve .Clutch solenoid modulating valves are mounted on the top of the transmission under the top cover. There is one clutch solenoid modulating valve for each of the six transmission clutches. In order to move the machine, a direction clutch solenoid and a speed clutch solenoid must be energized. Clutch solenoid modulating valves are used to directly modulate the oil pressure that is sent to each individual clutch. The clutch oil leakage and the return oil flows to the bottom of the transmission. All oil from nonenergized clutch solenoid modulating valves flows to the bottom of the