Remove/insert start-up clutch - AR27.51-P-0400-02AMG

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TEST VALUES FOR START UP CLUTCH

Number	Designation				Transmission 722.93
BE27.51-P-1001-02A	Installed height of start up clutch	Distance, bolt flange to transmission housing flange		mm	9.5
BE27.51-P-1001-02A	Installed height of start up clutch	Distance, bolt flange to transmission housing flange	See fig.		-

Fig 1: Identifying Grab Handle (168 589 00 62 00)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Parallel Support (126 589 04 31 00)

Courtesy of MERCEDES-BENZ USA

Remove start-up clutch

Position transmission vertically.
Attach grab handles (065) to start-up clutch.
Remove start-up clutch without tilting.
4.1 - If there are metal shavings in transmission oil pan, drain automatic transmission fluid from start-up clutch through a clean cloth. If there are metal shavings in the cloth: replace the start-up clutch as any remaining metal shavings will damage the transmission.
4.2 - If automatic transmission fluid is burnt or interspersed with abrasive particles: Rinse start-up clutch, oil cooling lines and oil cooler.

Fig 3: Attaching Grab Handles To Start-Up Clutch

Courtesy of MERCEDES-BENZ USA

Insert start-up clutch

Replace O-rings (1) and apply automatic transmission fluid.
Insert start-up clutch carefully without tilting.
Do not use force, otherwise the axial end stop of the start-up clutch will be irreparably damaged.

When doing so, move the start-up clutch back and forth until the drive spigots of the oil pump engage in the disengagement shift tubes of the start-up clutch.

Fig 4: Start-Up Clutch O-Rings
Courtesy of MERCEDES-BENZ USA

Fig 5: Applying Little Multi-Purpose Paste To Journal
Courtesy of MERCEDES-BENZ USA

Check that start-up clutch is seated correctly

An incorrectly inserted start-up clutch will be damaged when the transmission is installed, and will cause damage to the oil pump.

Fig 6: Checking Start-Up Clutch

Courtesy of MERCEDES-BENZ USA

Place parallel gauge (01) on flange of transmission housing.
Using depth gauge, measure difference dimension (D1) between parallel gauge (01) and bolt flange of start-up clutch.
Add measured difference dimension (D1) and specified distance dimension (D2) together.
If the start-up clutch is inserted correctly, the sum (D1 + D2) corresponds to the thickness (D3 = 20 mm) of the parallel gauge (01): D1 + D2 = D3.

If D1+ D2 ≈ D3: remove and insert the start-up clutch again and check whether it is seated correctly.
Detach grab handles (065) from start-up clutch.
Depth gauge