404137 Disassembling and assembling front drive shaft
WM 404137 Disassembling and assembling front drive shaft
Tools
Information
Component overview
Drive shaft components (shown as an example)
1) Danger of injury.
Tools
Disassembling drive shaft
WARNING
Objects or loads falling down
- Risk of squashing or crushing
-> Secure components to prevent them from falling down.
The joint on the transmission side and joint pin on the wheel side of the front axle can be replaced. The entire drive shaft must be replaced if the profile shaft is defective.
1. Remove cap from the inner joint -arrow-.
Removing cap
2. Remove circlip using circlip pliers Nr.68.
3. Remove bellow support from inner drive. Push bellows back.
4. Position inner joint on the ball hub (star-shaped inner ring). Press the joint off the profile shaft on a hydraulic press.
5. Release hose clamps and boots and take them off the profile shaft.
Removing boots
6. Clamp the drive shaft (use aluminium protective jaws). Position an aluminium mandrel on the ball hub (star-shaped inner ring) -arrow- and remove the joint pin (outer joint) by hitting it several times with a hammer -see illustration-.
Removing joint
Assembling drive shaft
WARNING
Objects or loads falling down
- Risk of squashing or crushing
-> Secure components to prevent them from falling down.
The drive shaft is assembled in reverse order.
Check all parts to be re-used carefully.
Before fitting the joint, slide all boots, hose clamps and other clamps on to the drive shaft.
Do not confuse the boots. They are not identical parts.
Use new circlips and ensure that they are seated correctly.
1. Clamp the drive shaft (use aluminium protective jaws). Position an aluminium mandrel on the ball hub (star-shaped inner ring) and fit the joint -see illustration- as far as it will go by hitting it several times with a hammer.
Fitting the joint
2. Fit the joint pin as far as it will go on to the drive shaft.
Information
- Do not use cleaning agents on the joints (grease thinners!).
- Always replace the removed joint at least during assembly.
- Press the grease with a sufficient amount of force into the ball tracks of the joint.
- Make sure that only a small amount of grease gets into the bellows. This grease is not relevant for the actual lubrication of the joint.
Regreasing joints:
Regrease the joints with special grease (refer to parts listings). The original grease quantities for the individual joints are specified in the following table.
Joint on transmission side: regrease as required, depending on the amount of grease left in the joint. Before replacing the cap, fill in the required amount of grease.
Greasing inner drive shaft
Joint pin on wheel side: regrease as required, depending on the amount of grease left in the joint. The joint pin is supplied ex-works with approx. 56 grams of grease at the outside and approx. 34 grams at the inside. Remove excess grease with a lint-free cloth. Push the required amount of grease through the joint to the outside. Then grease the inside of the joint.
Greasing outside of drive shaft
3. Fit the small hose clamps for the two boots between the grooves. If the boots are fitted correctly, the groove -A- will be visible.
Grooves in drive shaft
4. Fill in the appropriate quantity of grease before fitting the cap (on transmission side) and the bellow support. Seal the sealing faces with special sealant (see Spare Parts Catalogue). When fitting the cap, use two cheese head bolts -see illustration- to secure it. Using a rubber hammer, alternate between striking one side of the cap and bellow support and then the other in order to fit them at the correct position.
Fitting cap