Oil Supply For 4Matic Transfer Case Function - GF28.55-P-3010AVJ
Model 253 with transmission 725.096
View of transfer case sectioning
Cross-sectional view of center to rear transmission housing
Cross-sectional view of front to center transmission housing
Function requirements for 4MATIC transfer case oil supply, general
- Vehicle is moving or rolling
Oil supply for 4MATIC transfer case, general
The oil supply system ensures that the components of the transfer case are sufficiently greased and cooled.
The flange-mounted construction means that the transfer case and automatic transmission have a separate oil system. The following oil reservoirs are present in the transfer case:
- Front axle transmission output compartment and pump intake compartment (A)
- Tank compartment (B)
- Oil supply reservoir (settled) (C)
Tank compartment (B) and the front axle transmission output compartment and pump intake compartment (A) are connected to each other via oil holes. When the vehicle is stationary, the oil level is identical in both of these compartments.
Function sequence for 4MATIC transfer case oil supply
The oil supply is designed as a splash oil supply.
View of transfer case oil supply
The oil from the pump intake compartment is pumped by the oil pump to the transmission oil heat exchanger, cooled, and pumped to the front axle transmission output compartment and the pump intake compartment through the inlet from the transmission oil heat exchanger (4) and through the connection between the front axle transmission output compartment and pump intake compartment (5). The oil flows into the oil supply reservoir (settled) (C) through the tank compartment connection (6), onto the oil inlet for the multi-disk clutch (7) where it then cools the multidisk clutch.
View of multi-disk clutch oil supply
The oil flow to the multi-disk clutch is controlled by the cover (9). The oil is directed through the open cover (9) and flows to the multi-disk clutch so that this is cooled.
| Overview of system components, automatically controlled all-wheel drive (4MATIC) | GF28.00-P-9998AVJ |