Solenoid Coupling, Removing And Installing: Removing

Supercharger secured on engine/transmission holder for repair work. Refer to SUPERCHARGER, SECURING TO ENGINE/TRANSMISSION HOLDER FOR REPAIR WORK .

-- Remove the coolant pipes from the supercharger. Refer to SUPERCHARGER COOLANT PIPES, REMOVING AND INSTALLING .

-- Remove the bolts -arrows-.

Fig 1: Identifying Bolts

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-- Slightly lift the solenoid coupling -1- and turn until one of the three trim bolts is accessible.

Fig 2: Locating Trim Bolt

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-- Remove the first bolt -arrow-.

-- Remove the remaining bolts, to do so turn the solenoid coupling respectively ¹ /₃ turn further.

-- Remove the solenoid coupling -1- in direction of -arrow-.

Fig 3: Removing Drive Unit With Clutch

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-- Loosen the clamping screw -arrow- for the drive plate two turns by turning the drive plate in the respective position.

Fig 4: Identifying Clutch Plate Clamping Screw

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-- Install the : T40301 on the drive plate.

Fig 5: Positioning Puller T40301 On Clutch Plate

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The puller claws -arrows- must engage with the drive plate as shown.

-- Remove the drive plate -2-.

Fig 6: Pulling Out Clutch Plate

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-- Remove trim -1-.

-- Remove the O-ring -arrow-.

Fig 7: Identifying O-Ring

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Check the Sacrificial Liner and the Outer Friction Lining for Wear.

NOTE:

Before reinstalling a used solenoid coupling the sacrificial liner and the outer friction lining must be checked for wear.

Three measurements must be performed for this.

If a new solenoid coupling is being installed, this step is omitted. Refer to Installing to continue with the installation.

1st Measurement

Fig 8: 1st Measurement

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-- Place the caliper -1- as shown on the highest point on the sacrificial liner -2- and measure the distance -X- to the friction lining -3-.

Specified value -X- : minimum 0.2 mm.

-- Perform the measurement all around on at least three locations.

-- If the specified value is not reached, replace the solenoid coupling. Refer to Installing .

-- If the specified value is OK, continue to the second measurement. Refer to Fig 9.

2nd Measurement

Fig 9: Checking Distance Of Outer Friction Lining To Outer Friction Surface

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-- Place the drive plate -2- on the solenoid coupling -1- and install the : T40302 hand-tight.

-- With the feeler gauge -3- check the distance of the outer friction lining to the outer friction surface.

Specified value: minimum 0.2 mm.

-- Perform the measurement all around on at least three locations.

-- If the specified value is not reached, replace the solenoid coupling. Refer to Installing .

-- If the specified value is OK, continue to the second measurement. Refer to Fig 10.

3rd Measurement

Fig 10: Checking Distance Of Clamping Hub To Outer Friction Surface

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The drive plate is still placed -2- on the solenoid coupling -1- and the : T40302 is installed hand-tight.

-- Connect the : VAS6909 to a 12V battery or on the vehicle jump start terminal.

-- Connect the connector from the : VAS6909 to the solenoid coupling and switch on the power supply to the solenoid coupling.

CAUTION:

There is a risk of destroying the solenoid coupling.

The solenoid coupling must not be connected longer than 15 minutes to the power supply.
The current feed heats the solenoid coupling.

-- With the feeler gauge -3- on the position shown in the illustration check the distance from the clamping hub -shown in blue- to the outer friction surface in the energized state.

-- Perform this measurement on all three locations on the clamping hub.

Specified value: maximum 1.3 mm

-- If the specified value is exceeded, replace the solenoid coupling. Refer to Installing .

-- Switch off the : VAS6909 .