Check and correct oil level of transfer case - AR28.10-P-1000-26I

MODIFICATION NOTES

31.1.06

Transmission oil, Specifications for Operating Fluids

TRANSFER CASE COMPLETE

Number	Designation		Model 220.08/18 except model 220.087/187	Model 220.087/187
BA28.10-P-1004-01C	Oil filler opening screw plug	Nm	30	30
BA28.10-P-1005-01C	Inspection hole screw plug	Nm	30	30
BA28.10-P-1006-01C	Oil drain opening screw plug	Nm	30	30

TRANSFER CASE COMPLETE

Number	Designation			Model 220.083/084/ 087/183/184/187
BF28.10-P-1001-01D	Gear oil	Filling capacity	Liters	0.59
BF28.10-P-1001-01D	Gear oil	Specifications for Operating Fluids	Sheet	BB00.40-P-0236-13A

WORKSHOP EQUIPMENT

WE58.40-Z-1018-11A	Transmission platform
WE58.40-Z-1030-11A	Transmission jack

For accessibility of the screw plugs (7a, 7b) the rear engine crossmember must be removed and the propeller shaft (1) on the

transfer case (16) removed. If necessary in order to unscrew the screw plug (7c) of the oil drain opening, in addition the rear engine mount (45) and the right engine mount carrier (45a) must be removed.

Raise automatic transmission with transmission jack and transmission platform until transfer case (16) is in installation position.

Fig 1: Identifying Screw Plugs, Propeller Shaft And Transfer Case

Only perform the oil level check at interior temperature and not when the transfer case is hot.
Clean area around screw plug (7a) of oil filler opening.
Remove screw plug (7a).
Remove screw plug (7b) of inspection opening.
Add oil via the oil filler opening until it runs out of the inspection opening.
This is the only way to perform the check because there is another oil chamber behind the oil filler opening which must be full.
Let oil escape for approximately one to two minutes and then turn in the screw plug (7b) and tighten.
Replace sealing ring of screw plug (7b).
Screw in screw plug (7a) and tighten.
Replace sealing ring of screw plug (7a).