MANIFOLD-EXHAUST 7N4906 - Caterpillar

Illustration 3 g00907999
Illustration 4 g00913243
The modulating valves (5) are located on the right side of the machine on top of the transmission.Transmission Relief Valve
Illustration 5 g00913246
The transmission relief valve (6) is located below the modulating valves on the right side of the machine.Transmission Clutches
Illustration 6 g00921961
There are six clutches that are used to transfer power from input shaft assembly (7) to output shaft assembly (12) .There are three direction clutches.
Clutch 1 (8) (forward low).
Clutch 2 (9) (forward high)
Clutch 3 (16) (reverse)There are 3 speed clutches.
Clutch 4 (11) (second speed)
Clutch 5 (14) (third speed and fourth speed)
Clutch 6 (13) (first speed)In order for the power to be transferred through the transmission to the output shaft assembly (12), one direction clutch must be engaged and one gear clutch must be engaged. Each clutch is controlled by a modulating valve. The machine ECM controls the proper engagement of the clutches by sending a variable signal to the solenoids on the modulating valves.Clutch 2 (9) and clutch 1 (8) are located on shaft assembly (10). Clutch 3 (16) and clutch 4 (11) are located on shaft assembly (17). Clutch 6 (13) and the clutch 5 (14) are located on shaft assembly (15) .When the transmission is in NEUTRAL, clutch 5 is engaged.Test Ports
Test Ports for the Modulating Valves
Illustration 7 g00913249
The test port for the modulating valve for clutch 2 (18) is located on the modulating valve for clutch 2. The test port for the modulating valve for clutch 1 (19) is located on the modulating valve for clutch 1. The test port for the modulating valve for clutch 3 (20) is located on the modulating valve for clutch 3. The test port for the modulating valve for clutch 4 (21) is located on the modulating valve for clutch 4. The test port for the modulating valve for the clutch 5 (22) is located on the modulating valve for the clutch 5. The test port for the modulating valve for clutch 6 (23) is located on the modulating valve for clutch 6.Test Port for the Torque Converter Inlet Oil Pressure
Illustration 8 g00913251
The test port for the torque converter inlet oil pressure (24) is located on the main relief valve.Test Port for the Transmission Pump Pressure
The test port for the transmission pump pressure (34) is located on the main relief valve.Test Port for the Torque Converter Outlet Pressure
Illustration 9 g00908050
The test port for the torque converter outlet pressure is located on the top of the transmission. The test port for the torque converter outlet pressure is above the torque converter temperature sensor.Transmission Pump
Illustration 10 g00889934
The transmission pump (26) is bolted to the transmission cover (28). The transmission pump is driven by the torque converter. The hydraulic oil pump (27) is mounted to the back of the transmission pump.Transmission Oil Cooler
Illustration 11 g00940735
The transmission oil cooler (30) is located at the rear of the machine next to the hydraulic oil cooler (29) .Relief Valves
Illustration 12 g00896562
Torque Converter Inlet Relief Valve
The torque converter inlet relief valve is located in the torque converter housing under the transmission