950G II Wheel Loader AYB00001-UP (MACHINE) POWERED BY 3126B Engine(...
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Producto: WHEEL LOADER
Modelo: 950G II WHEEL LOADER AYB
Configuración: 950G II Wheel Loader AYB00001-UP (MACHINE) POWERED BY 3126B Engine
Operación de Sistemas
950G Series II Wheel Loader, 962G Series II Wheel Loader and IT62G Series II
Integrated Toolcarrier Power Train
Número de medio -RENR4309-03 Fecha de publicación -01/03/2003 Fecha de actualización -18/03/2003
i01250522
Transmission Hydraulic System
SMCS - 3030
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950G II Wheel Loader AYB00001-UP (MACHINE) POWERED BY 3126B Engine(... Page 2 of 3
Illustration 1 g00666034
Schematic for the Transmission Hydraulic System
(1) Transmission hydraulic control relief valve
(2) Torque converter
(3) Flow control orifice
(4) Transmission oil filter
(5) Clutch solenoid modulating valve for the Number 1 clutch
(6) Clutch solenoid modulating valve for the Number 4 clutch
(7) Clutch solenoid modulating valve for the Number 2 clutch
(8) Clutch solenoid modulating valve for the Number 5 clutch
(9) Clutch solenoid modulating valve for the Number 3 clutch
(10) Clutch solenoid 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 at the transmission hydraulic control relief valve
(B) P3 Torque converter inlet pressure tap
(C) Torque converter outlet pressure tap
(D) Pump pressure tap at the oil filter
(F) Sampling valve for the transmission oil
(G) Pressure tap for the Number 1 clutch
(H) Pressure tap for the Number 4 clutch
(J) Pressure tap for the Number 2 clutch
(K) Pressure tap for the Number 5 clutch
(L) Pressure tap for the Number 3 clutch
(M) Pressure tap for the Number 6 clutch
(N) Transmission lubrication pressure tap
The 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), clutch solenoid modulating valves (5-10), torque converter (2), torque converter inlet relief
valve (12) and oil cooler (16) .
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950G II Wheel Loader AYB00001-UP (MACHINE) POWERED BY 3126B Engine(... Page 3 of 3
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 by pulling oil from oil
sump (14). The oil flows through suction screen and magnet (13). 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 (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 to transmission hydraulic
control relief valve (1). Pressurized oil also flows from the torque converter housing to clutch
solenoid modulating valves (5-10) through the internal passages in the transmission housing.
Clutch solenoid modulating valves (5-10) are mounted on the top of the transmission under the cab.
There is one clutch solenoid modulating valve (5-10) 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 (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. All oil from nonenergized clutch solenoid modulating valves (5-10) flows 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 valve (1) controls the pressure of the oil that is supplied to
clutch solenoid modulating valves (5-10). Oil flows into transmission hydraulic control relief valve
(1) at a maximum pressure of 2897 kPa (420 psi). The oil pressure overcomes the spring force of
transmission hydraulic control relief valve (1). The torque converter inlet oil flows to torque
converter (2) at 550 kPa (80 psi).
Torque converter inlet relief valve (12) limits P3 torque converter inlet oil pressure to a maximum of
900 ± 70 kPa (130 ± 10 psi). Torque converter inlet relief valve (12) is located in the torque converter
housing beneath transmission hydraulic control relief valve (1). Transmission hydraulic control relief
valve (1) must be removed in order to access the torque converter inlet relief valve. The outlet oil
from torque converter (2) flows to oil cooler (16) .
Oil cooler (16) is located in the bottom tank of the radiator. After the oil has been cooled, the oil
flows to the transmission. The oil provides lubrication and cooling to the transmission. The oil flows
through internal passages in the transmission to the bearings, to the gears and to the clutches. The oil
then flows to the bottom of the transmission and to oil sump (14) in the bottom of the output transfer
gear case.
Copyright 1993 - 2020 Caterpillar Inc. Sat Jul 18 11:45:15 EST 2020
Todos los derechos reservados.
Red privada para licenciados del SIS.
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