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Tuesday, January 1, 2013

793D Off-Highway Truck Power Train: Torque Converter and Transmission Hydraulic System


Hydraulic Schematic

Schematic for the hydraulic system for the torque converter and for the transmission
The schematic shows the torque converter drive NEUTRAL position.
(1) No. 1 clutch
(2) No. 2 clutch
(3) No. 3 clutch
(4) No. 4 clutch
(5) No. 5 clutch
(6) No. 6 clutch
(7) Transmission lubrication section of the oil pump
(8) Passage for lubrication of the transmission and the transfer gears
(9) Lockup clutch solenoid
(10) Downshift solenoid
(11) Upshift solenoid
(12) Rotary actuator
(13) Torque converter charging section of the oil pump
(14) Transmission charging section of the oil pump
(15) Pump prime orifice
(16) Transmission charging hydraulic filter
(17) Oil filter for torque converter charging
(18) Selector piston for the No. 2 clutch
(19) Load piston for the No. 2 clutch
(20) Modulation reduction valve for the No. 2 clutch
(21) Modulation reduction valve for the No. 4 clutch
(22) Load piston for the No. 4 clutch
(23) Selector piston for the No. 4 clutch
(24) Transmission scavenge section of the oil pump
(25) Relay valve in the lockup clutch and synchronizing valve
(26) Rotary selector spool
(27) Selector and pressure control valve
(28) Selector piston for the No. 1 clutch
(29) Load piston for the No. 1 clutch
(30) Modulation reduction valve for the No. 1 clutch
(31) Modulation reduction valve for the No. 5 clutch
(32) Load piston for the No. 5 clutch
(33) Selector piston for the No. 5 clutch
(34) Scavenge screens
(35) Baffle
(36) Torque converter
(37) Magnetic screen
(38) Transmission lubrication relief valve
(39) Transfer gear and transmission case reservoir
(40) Pressure reduction valve in the lockup clutch and synchronizing valve
(41) Priority reduction valve
(42) Neutralizer valve
(43) Selector piston for the No. 3 clutch
(44) Load piston for the No. 3 clutch
(45) Modulation reduction valve for the No. 3 clutch
(46) Modulation reduction valve for the No. 6 clutch
(47) Load piston for the No. 6 clutch
(48) Selector piston for the No. 6 clutch
(49) Torque converter sump
(50) Lockup clutch for the torque converter
(51) Torque converter inlet relief valve
(52) Modulation reduction valve in the lockup clutch and synchronizing valve
(53) Shuttle valve in the lockup clutch and synchronizing valve
(57) Bypass switch for the torque converter screen
(58) Oil cooler for the torque converter and for the transmission
(59) Selector piston in the lockup clutch and synchronizing valve
(60) Load piston in the lockup clutch and synchronizing valve
(61) Restriction orifice for the torque converter outlet
(62) Torque converter outlet relief valve
(63) Torque converter screen
(64) Pump drive
(65) Torque converter lockup clutch and synchronizing valve
(66) Dual stage relief valve
(67) Pressure control valve
(A) Pressure tap for the No. 2 clutch
(B) Pressure tap for the No. 1 clutch
(C) Pressure tap for the No. 3 clutch
(D) Pressure tap for the signal pressure of the dual stage relief valve in the selector and pressure control valve
(E) Pressure tap for the No. 4 clutch
(F) Pressure tap for the No. 5 clutch
(G) Pressure tap for the No. 6 clutch
(H) This tap is not used.
(J) Pressure tap for upshift pressure
(K) Pressure tap for downshift pressure
(L) Pressure tap for the pressure of the transmission charge pump section
(M) Pressure tap for the pilot oil of the transmission hydraulic control
(N) Pressure tap for transmission lubrication
(AA) Pressure tap for torque converter inlet pressure
(BB) Pressure tap for torque converter outlet pressure
(CC) Pressure tap for pilot oil of the lockup clutch and synchronizing valve(DD) Pressure tap for maximum pressure of the lockup clutch

Location Of Components

Top view of the power train oil lines
(7) Transmission lubrication section of the oil pump
(8) Passage for lubrication of the transmission and of the transfer gears
(13) Torque converter charging section of the oil pump
(14) Transmission charging section of the oil pump
(16) Transmission charging hydraulic filter
(17) Torque converter hydraulic filter
(24) Transmission scavenge section of the oil pump
(34) Scavenge screen
(37) Magnetic screen
(38) Transmission lubrication relief valve
(39) Transfer gear and transmission case reservoir
(49) Torque converter sump
(51) Torque converter inlet relief valve
(57) Bypass switch for the torque converter screen
(58) Oil cooler for the torque converter and the transmission
(62) Torque converter outlet relief valve
(63) Torque converter screen
(64) Pump drive(65) Torque converter lockup clutch and synchronizing valve
Side view of the power train oil lines
(7) Transmission lubrication section of the oil pump
(8) Passage for lubrication of the transmission and of the transfer gears
(13) Torque converter charging section of the oil pump
(14) Transmission charging section of the oil pump
(16) Transmission charging hydraulic filter
(17) Torque converter hydraulic filter
(24) Transmission scavenge section of the oil pump
(34) Scavenge screen
(37) Magnetic screen
(38) Transmission lubrication relief valve
(39) Transfer gear and transmission case reservoir
(49) Torque converter sump
(57) Bypass switch for the torque converter screen
(63) Torque converter screen(65) Torque converter lockup clutch and synchronizing valve
Rear of the torque converter
(16) Transmission charging hydraulic filter
(17) Torque converter hydraulic filter
(49) Torque converter sump
(51) Torque converter inlet relief valve
(62) Torque converter outlet relief valve
(63) Torque converter screen(65) Torque converter lockup clutch and synchronizing valve
Rear of the torque converter
(AA) Pressure tap for torque converter inlet pressure
(BB) Pressure tap for torque converter outlet pressure
(CC) Pressure tap for pilot pressure of the lockup clutch(DD) Pressure tap for maximum pressure of the lockup clutch
Transmission hydraulic control
(38) Transmission lubrication relief valve
(A) Pressure tap for the No. 2 clutch
(B) Pressure tap for the No. 1 clutch
(C) Pressure tap for the No. 3 clutch
(D) Pressure tap for the signal pressure to the dual stage relief valve in the selector and pressure control valve
(E) Pressure tap for the No. 4 clutch
(F) Pressure tap for the No. 5 clutch
(G) Pressure tap for the No. 6 clutch
(H) Pressure tap
(L) Pressure tap for the pressure of the transmission charge pump section(M) Pressure tap for the pilot oil of the transmission hydraulic control
Side of the transmission hydraulic control
(J) Pressure tap for upshift pressure
(K) Pressure tap for downshift pressure(L) Pressure tap for the pressure of the transmission charge pump section
Transfer gear case(N) Pressure tap for lubrication of the transmission



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793D Off-Highway Truck Power Train: Torque Converter and Transmission Hydraulic System Rating: 4.5 Diposkan Oleh: Unknown

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