TM 5-3825-226-24
TRANSMISSION LUBRICATION SYSTEM
TRANSMISSION LUBRICATION SYSTEM
1. Case for output transfer
4. Case for input transfer
6. Lubrication relief valve.
10. Screen.
gears.
gears.
7. Pressure section of oil
11. Torque converter
2. Transmission hydraulic
5. Scavenge section of oil
pump.
housing.
controls.
pump.
8. Magnetic strainer.
12. Oil cooler.
3. Oil filter for transmission.
9. Transmission case.
The oil for the operation and lubrication of the
transmission is made available by the pressure section
(7) of the oil pump. The scavenge section (5) of the oil
pump sends oil from the reservoir of torque converter
housing to the reservoir for the transmission. The two
section pump is turned by a drive gear which is engaged
with a gear that is fastened to the impeller of the torque
converter.
The reservoir of the torque converter is in the
bottom of torque converter housing (11). The reservoir
for the transmission is in the bottom of case for output
gears (1).
The oil is pulled by pressure section (7) of the oil
pump to the magnetic strainer (8) which separates
foreign material from the pump inlet oil. The oil goes to
the pump through an external line. The oil goes from
the pump through oil filter (3) to the transmission
hydraulic controls (2). If there is a restriction in the oil
filter, or if the viscosity of the oil is very high, the bypass
valve in the housing of oil filter (3) will open. This action
lets the oil go past the filter element to the transmission
hydraulic controls.
Valves in the transmission hydraulic controls send
the oil to the clutches in the transmission and to the
torque converter. Oil that is not needed to fill the
clutches is sent into the torque converter. From the
torque converter, the oil goes through an oil cooler (12)
to the lubrication relief valve (6) on the output transfer
gear case. The lubrication relief valve prevents too high
pressure oil from going to the planetary transmission.
2-86
