Front Axle Differential Lock Fluid, Draining And Filling

Special tools and workshop equipment required

Torque Wrench 1331 5-50Nm: V.A.G 1331

Fig 1: Identifying Torque Wrench
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Used Oil Collection and Extraction Unit: SMN372500

Fig 2: Identifying Used Oil Collection and Extraction Unit
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Flexible Funnel: VAS 6675

Fig 3: Identifying Flexible Funnel VAS 6675
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Commercially available hose approximately (1.50 m long - (.06 in)) outer circumference approximately 15 mm (.59 in
Commercially Available Funnel
Acid-Resistant Safety Gloves

Observe the safety information.
Use a Digital Thermometer: VAS 6519 to measure the oil temperature.
The vehicle must be level.
Front axle differential lock in installation position.

CAUTION:

Wear acid-resistant safety gloves.

-- If equipped, remove the noise insulation. Refer to OVERVIEW - NOISE INSULATION .

-- Place the Used Oil Collection and Extraction Unit: SMN372500 under the final drive.

-- Use the Flexible Funnel: VAS 6675 to drain the oil.

-- Position the Funnel so that the subframe does not come in contact with the oil.

-- Remove the oil drain plug -arrow- from the front axle differential lock.

Fig 4: Identifying Oil Drain Plug

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-- Completely drain the Front Axle Differential Lock Fluid.

Fig 5: Identifying Flexible Funnel VAS 6675

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The illustration shows an example for use.

NOTE:

If the oil can no longer be filled, please pay attention to the disposal regulations.

-- Install the new oil drain plug -arrow- (see previous illustration) and tighten to the tightening specification.

-- Install the noise insulation. Refer to OVERVIEW - NOISE INSULATION .

Tightening Specification

Oil drain plug. Refer to OVERVIEW - FRONT AXLE DIFFERENTIAL LOCK COMPONENTS .

Fill the front axle differential lock fluid

-- Replace oil filler plug after removing.

The vehicle must be level.

-- Place the Used Oil Collection and Extraction Unit: SMN372500 under the front axle differential lock.

Fig 6: Inserting Funnel In Hose

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-- Use a Commercially Available Hose approximately (1.50 m long - (.06 in)) with Outer Circumference approximately 15 mm (.59 in) and a Commercially Available Funnel to fill:

-- Route the hose -A- through the engine compartment.

-- Clean the area near the front axle differential lock oil filler plug -arrow-.

Fig 7: Checking Oil Level

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-- Cover neighboring components.

-- Remove the oil filler plug -arrow-.

-- Insert hose -A- in the filler hole -arrow-.

Fig 8: Insert Hose In Filler Hole

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The hose must not sag.

-- Insert the funnel in Hose -A-.

Fig 9: Inserting Funnel In Hose

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-- Fill with oil until some starts to escape from between the hose and the oil fill hole.

-- Remove Hose. Some extra oil may drain out.

The oil level is correct when it fills up to the lower edge of the oil fill hole.

-- Install a new oil filler plug -arrow- and tighten it to the tightening specification.

Fig 10: Checking Oil Level

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-- If necessary, clean the area near the front axle differential lock oil filler plug -arrow- and neighboring components.

Tightening Specification

Oil filler plug. Refer to OVERVIEW - FRONT AXLE DIFFERENTIAL LOCK COMPONENTS .