Remove/install multi-disk brake B1 and oil pump - AR27.50-P-0721WMG

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TRANSMISSION 722.93

Fig 1: Multi-Disk Brake B1 And Oil Pump Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Removing
	General information	Apply oil to the transmission components before installation in order to prevent damage during the starting phase.
1	Remove drive unit	The drive unit consists of the drive shaft, multidisk clutch K2, front planet carrier, internal plate carrier, multidisk clutch K1 and multidisk brake B3.	AR27.50-P-0612W
2	Unscrew bolts (17a) and remove oil pump (17)	Partially unscrew two opposing bolts (17a) and remove the oil pump from the torque converter housing (1w) by applying gentle blows using a plastic mallet. The impellers (17r, 17z) lie loose in the oil pump housing.
3	Disassemble multidisk brake B1	If necessary. Do not detach the external plate carrier (16a) of multidisk brake B1 from the torque converter housing (1w). The external plate carrier (16a) and torque converter housing (1w) would otherwise be damaged irreparably when assembled. The torque converter housing (1w), external plate carrier (16a) and gasket (1d) form a single unit and must always be replaced together.	AR27.50-P-0870W
	Checking
4	Check gasket (1d)	If undamaged, the gasket (1d) can be reused several times. The gasket (1d) must not exhibit any scratches or any other damage; do not apply sealant to the gasket. The torque converter housing (1w), external plate carrier (16a) and gasket (1d) form a single unit and must always be replaced together.
	Install
5	Install oil pump (17)	Replace the radial sealing ring and O-ring (17o). Insert the impeller (17r) in such a way that the chamfer (arrow) points toward the oil pump (17).
5	Install oil pump (17)		*BA27.40-P-1003-01A
6	Install drive unit		AR27.50-P-0612W

TORQUE CONVERTER HOUSING

Number	Designation		Transmission 722.9
BA27.40-P-1003-01A	Bolt, oil pump with multi-disk brake B1 to torque converter housing	Nm	20