PUMP GP-PISTON 2609095 - Caterpillar

Illustration 1 g00666062
Schematic for the Transmission Hydraulic System (1) Transmission hydraulic control relief valve (2) Torque converter (3) Torque converter outlet relief valve (4) Transmission oil filter (5) Transmission clutch modulating valve for the Number 1 clutch (6) Transmission clutch modulating valve for the Number 4 clutch (7) Transmission clutch modulating valve for the Number 2 clutch (8) Transmission clutch modulating valve for the Number 5 clutch (9) Transmission clutch modulating valve for the Number 3 clutch (10) Transmission clutch modulating valve for the Number 6 clutch (11) Transmission oil pump (12) Torque converter inlet relief valve (13) Suction screen and magnet (14) Oil sump (15) Transmission lubrication (16) Oil cooler (A) Pump pressure tap (B) P3 Torque converter inlet pressure tap (C) Torque converter outlet pressure tap (D) Sampling valve for the transmission oil (F) Number 1 clutch pressure tap (G) Number 4 clutch pressure tap (H) Number 2 clutch pressure tap (J) Number 5 clutch pressure tap (K) Number 3 clutch pressure tap (L) Number 6 clutch pressure tap (M) Transmission lubrication pressure tapThe transmission hydraulic system consists of the following components: suction screen and magnet (13), transmission oil pump (11), transmission oil filter (4), transmission hydraulic control relief valve (1), transmission clutch modulating valves (5-10), torque converter (2), torque converter inlet relief valve (12), torque converter outlet relief valve (3) and oil cooler (16) .The bottom of the output transfer gear case contains oil sump (14). Transmission oil pump (11) is a one-section gear type pump. Transmission oil pump (11) is a positive displacement pump. Transmission oil pump (11) supplies oil to the transmission hydraulic system. Transmission oil pump (11) pulls oil from oil sump (14). The oil flows through the suction screen and magnet (13). Oil is supplied to the pump inlet through a tube that is mounted to the pump inlet and the output transfer gear case. Pressurized oil exits the pump outlet and flows to externally mounted transmission oil filter (4). Pressurized oil flows from transmission oil filter (4) through an external hose to the torque converter housing. Pressurized oil then flows through internal passages in the torque converter housing. Transmission hydraulic control relief valve (1) receives some of the pressurized oil flow. Transmission clutch modulating valves (5-10) receive some of the pressurized oil flow.Transmission clutch modulating valves (5-10) are mounted on the top of the transmission under the cab. The six transmission clutches have an individual transmission clutch modulating valves (5-10). In order to move the machine, a direction clutch solenoid and a speed clutch solenoid must be energized. The transmission clutch modulating valves (5-10) are used to directly modulate the oil pressure that is sent to each individual clutch. The clutch leakage oil and the return oil flows to the bottom of the transmission. The nonenergized transmission clutch modulating valves (5-10) return the oil flow to the bottom of the transmission. The oil then flows to oil sump (14) in the bottom of the output transfer gear case.Transmission hydraulic control relief