Remove/Install Transmission Oil Pump Radial Shaft Sealing Ring - AR27.40-P-0300MNE

Transmission 725.06/09 

Wet clutch removed 

Transmission 725.103 

Wet clutch removed 

Transmission 725.163 

Wet clutch removed 

Transmission 725.164 

Wet clutch removed 

Courtesy of MERCEDES-BENZ USA

	Risk of injury  to skin and eyes due to handling of transmission oil. Health risk caused by swallowing transmission oil	Wear protective gloves, protective clothing and safety glasses. Do not pour transmission oil into beverage bottles.	AS00.40-Z-0001-01A
Notice	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
	Notes on automatic transmission		AH27.19-P-0001-01NKB
	Remove
1	Pry radial shaft sealing ring (2) out of transmission firewall cover (3) using a suitable tool	Do not damage the seat of the radial shaft sealing ring (2). Otherwise, the transmission will be damaged. Ensure maximum cleanliness when performing work on the transmission. Otherwise, even the smallest foreign particle in the hydraulic components of the transmission can lead to malfunctions or a total failure of the transmission. For cleaning, use lint-free cleaning cloth. Chamois leathers are the most suitable.
2	Check seat of radial shaft sealing ring (2) for damage and galling	If a problem arises ↓ Install a new transmission firewall cover (3).	AR27.10-P-0400EWM
	Install
3	Moisten new radial shaft sealing ring sealing lip (2) with transmission oil
	Automatic transmission fluids (ATF) (specification 236.17)		BB00.40-P-0236-17A
4	Drive new radial shaft sealing ring (2) into transmission firewall cover (3) using drift (01)	Drift	Fig 1

Fig 1: Identifying Drift (725 589 08 15 00)

Courtesy of MERCEDES-BENZ USA