SPINDLE 6D2404 - Caterpillar

Illustration 1 g03344889
Power Train Schematic (1) Baffle (2) Liquid level sensor for the transmission (3) Screen (4) Sump for the torque converter (5) Manifold (6) Torque converter scavenge pump (7) Torque converter charge pump (8) Transmission charge pump (9) Transmission lubrication pump (10) Purge orifice (11) Transmission lubrication valve (12) Sump for the transmission (13) Magnetic screen (14) Temperature sensor for the transmission oil (15) Speed sensor for the engine (16) Speed sensors (transmission output) (17) Speed sensor (transmission input) (18) Intermediate speed sensor for the transmission (19) Transmission ECM (20) Main relief valve for the transmission (21) Modulating valves for the transmission (22) Lockup clutch for the torque converter (23) Torque converter (24) Inlet relief valve for the torque converter (25) Bypass orifice (26) Outlet relief valve for the toque converter (27) Oil filter bypass switch for the torque converter (28) Oil filter bypass switch for the transmission (29) Oil filter for the torque converter (30) Oil filter for the transmission (31) Pump drive (32) Temperature sensor for the torque converter output (33) Bypass switch for the torque converter screen (34) Oil cooler for the power train oil (35) Speed sensor (transmission intermediate) (APECS only)The power train is electronically controlled and hydraulically operated.The transmission electronic control module (Transmission ECM) matches the transmission speed to the selected speed of the transmission shift lever. The transmission ECM gets information of the selected speed of operation through the electrical system. The transmission ECM activates the transmission and the torque converter hydraulic systems through the modulating valve solenoids for the transmission, and the modulating valve solenoid for the torque converter lockup clutch.The torque converter has a lockup clutch for direct drive and a one-way clutch for torque converter drive. The torque converter is fastened directly to the flywheel of the engine.The torque converter drives the transmission hydraulically, unless the lockup clutch is activated. When the lockup solenoid is activated, the lockup clutch is hydraulically engaged. The torque converter rotating housing is now mechanically connected to the output shaft of the torque converter. The drive shaft mechanically connects the torque converter to the transfer gears. The transfer gears are fastened directly to the transmission.The modulating valve solenoids for the transmission hydraulically activate the transmission hydraulic control valves. The control valves activate the transmission clutches which cause the mechanical connection to the transmission output shaft. The clutches in the transmission will not drive the transmission output shaft unless the torque converter is activated hydraulically or mechanically.The transmission has six forward speeds and one reverse speed. The selection of speed is done manually in REVERSE, in NEUTRAL and in FIRST. The selection of SECOND through SIXTH speeds is done automatically.Power is sent through the REVERSE gear in torque converter drive only. FIRST has both a torque converter drive and a direct drive. SECOND through SIXTH speeds are direct drive only with a short time of converter drive during transmission clutch engagement in order to enable smoother shifts. The transmission is fastened directly to the differential