PIN-TRACK LINK 8M7456 - Caterpillar

Illustration 1 g03020257
273-3192 Transmission Schematic
(A) 552 kPa (80 psi)
(B) 310 kPa (45 psi)
(C) 190 L/min (50 US gpm) 1900 RPM - High idle
(D) 265 L/min (70 US gpm)1900 RPM - High idle
(E) Input ratio is 0.822:1
(1) Torque converter with lockup clutch
(2) 367-9108 Lockup Clutch Valve and Mounting Gp
(3) 333-6434 Oil Filter Gp
(4) 367-2806 Control Manifold Gp
(5) Planetary and pump drive lube
(6) Transmission sump
(7) Oil cooler - TC
(8) 261-3048 Gear Pump Gp
(9) Transmission oil cooler
(10) Transmission lube
(11) 201-6615 Speed Sensor Gp
(12) 318-1181 Speed Sensor Gp
(13) 3E-8700 Temperature Sensor Gp
(14) 3E-8700 Temperature Sensor Gp
(15) Down solenoid 193-8559 Solenoid Valve Gp
(16) Up solenoid 193-8559 Solenoid Valve Gp
(17) 26 L/min (6.9 US gpm) Bypass
(18) Neutralizing Valve
(19) Rotary selector
(20) Priority reduction valve
(21) Pilot pressure tap
(22) Lube relief valve
(23) Relief valve 3240 kPa (470 psi)
(24) 261-3383 Selector and Pressure Control Valve
(25) 9W-4119 Rotary Actuator
(26) 198-8761 Position Sensor Gp
(27) Shift pattern switch per customer specs.
(28) Transmission control
(29) Modulating orifice (typically six places)
(30) Drain (typically six places)
(31) 261-3378 Pressure Control Valve Gp
(32) Modulating reducing valve (typically six places)
(33) Load piston plugs (typically six places)
(34) Load pistons (typically six places) The transmission is controlled and lubricated by oil that is supplied from the sump (6) of the power train hydraulic system by power train oil pump (8).Oil is taken from the sump of the hydraulic system by the oil pump and oil is fed via oil filters (3) to the following components:
(2) Lockup Clutch Valve and Mounting Gp
(4) Control Manifold Gp
(15) and (16) UP/DOWN Shift Solenoid Valve Groups
(1) Torque Converter
(24) Selector and Pressure Control Valve
(31) Pressure Control Valve GpTest points for oil pressure and two oil temperature sensors are incorporated in the hydraulic system.Control of the planetary transmission is achieved by electronically activated modulating valves (15) and (16) that upshift and downshift the rotary selector (19) in the selector and pressure control valve (24). The rotary selector (19) modulates the valves (32) in the pressure control valve group (31) which allows oil to fill the various clutches in the planetary transmission.The torque converter allows the power to be transmitted smoothly from the engine to the speed increaser and planetary transmission. The torque converter allows the speeds of the engine and the transmission to be matched smoothly. Once the speeds are matched, the modulating (ECPC) valve for the torque converter lockup clutch engages the clutch in the torque converter. The torque converter provides direct drive from the engine to the speed increaser and planetary transmission.Oil is fed to the torque converter (1). When the lockup clutch is disengaged, the oil transmits the drive from the engine through the torque converter (1) to the speed increaser and planetary transmission. Outlet oil from the torque converter (1) goes through the lube relief valve (22) and forward as lubricant for the transmission.Location Of Components
Illustration 2 g03018317
Top view of the transmission
(35) Torque converter oil temperature sensor
(36) Torque converter housing
(37) Lubrication relief valve
(38) Torque converter