SHAFT 6G7746 - Caterpillar

Illustration 1 g03566685
(1) Transmission oil pump
(2) Transmission oil filter
(3) Clutch solenoid modulating valve for the lock up torque converter
(4) Clutch solenoid modulating valve for the Number 1 clutch (reverse)
(5) Clutch solenoid modulating valve for the Number 2 clutch (forward)
(6) Clutch solenoid modulating valve for the Number 3 clutch (fourth speed)
(7) Clutch solenoid modulating valve for the Number 4 clutch (third speed)
(8) Clutch solenoid modulating valve for the Number 5 clutch (second speed)
(9) Clutch solenoid modulating valve for the Number 6 clutch (first speed)
(10) Main Relief
(11) Torque converter inlet relief valve
(12) Torque converter outlet relief valve
(13) Transmission oil cooler
(14) Sump
(15) Suction screen and magnet
(16) Torque converter
(17) Transmission Lubrication
Illustration 2 g06062662
(1) Transmission oil pump
(3) Clutch solenoid modulating valve for the lock up torque converter
(4) Clutch solenoid modulating valve for the Number 1 clutch (reverse)
(5) Clutch solenoid modulating valve for the Number 2 clutch (forward)
(6) Clutch solenoid modulating valve for the Number 3 clutch (fourth speed)
(7) Clutch solenoid modulating valve for the Number 4 clutch (third speed)
(8) Clutch solenoid modulating valve for the Number 5 clutch (second speed)
(9) Clutch solenoid modulating valve for the Number 6 clutch (first speed)
(10) Main Relief
(12) Torque converter outlet relief valve
(14) Sump
(15) Suction screen and magnetStarting the Engine with the Transmission in the NEUTRAL position
When the engine is started, the transmission oil pump (1) pulls oil from oil sump (14). The oil flows through the suction screen and magnet (15). Transmission oil pump (1) sends pressurized oil through transmission oil filter (2). Pressurized transmission oil flows from the transmission oil filter to the oil inlet in the transmission case. The pressurized oil flows through internal tubes in order to supply transmission hydraulic control relief valve (10) with oil. The pressurized oil also flows through internal passages in the transmission hydraulic control manifold. The pressurized oil flows out of the internal passages in the transmission hydraulic control manifold into clutch solenoid modulating valves (4) and (9). Number 4 clutch solenoid (8) is energized because the transmission is in neutral. None of the remaining clutch solenoid modulating valves provide oil to the transmission clutches. The pressurized oil leakage drains to oil sump (14).The transmission hydraulic control relief valve (10) sends torque converter inlet oil to torque converter (16). Torque converter outlet oil flows to oil cooler (13). After the oil cools, the oil flows to the transmission for transmission lubrication (17). After the transmission is lubricated and cooled, the oil drains to the oil sump (14).Torque converter inlet relief valve (11) limits torque converter inlet oil pressure to a maximum of 760 150 kPa (110 21 psi).Shifting the Transmission to the FIRST SPEED FORWARD position
The power train electronic control module (ECM) modulates the electrical current that is sent to the selected clutch solenoid modulating valve. Modulating the current to the clutch solenoid modulating valve controls the transmission clutch pressure.When the transmission direction control switch and the upshift switch are shifted to the FIRST SPEED FORWARD position, both clutch solenoid Number 6 (9) and Number 2 (5) are energized.Number