MERCEDES W108 PINION SEAL REPLACEMENT
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- Опубликовано: 13 сен 2024
- Changing out the rear pinion seal is not just a question of removing the old and in with the new. There are several steps to take into consideration when doing this repair. The most important is to make sure the torque of the pinion nut is within specification. Taking extreme care not to over tighten, which will cause damage to the differential bearings and would require the axle to be removed from the car to repair. A dial type inch pound torque wrench is needed to measure the final rotational torque value. A beam style torque wrench can also be used, but due to the confined space I found the dial one better suited.
Links for special socket and torque wrench.
www.authenticc...
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Am readying all my '64 w112 rear axle and differential components this weekend and will be re-assembling it next weekend. This video is very helpful. Thanks John.
Thank you. Cheers John.
Hi John, greetings from the UK! Just latched onto your channel, which I am thoroughly enjoying by the way. A bit academic now, because this video is 7 months old, but i have done one or two pinion seals in my time, and as I understand it, the reason for the marking procedure is nothing to do with balancing, because there is not much weight versus distance from centre on the diff flange to make any real difference. It actually relates to "normal" cars that do not use that stupid castellated nut which has to be renewed. If you mark the position of the nut relative to the flange, it ensures it is torqued to the same place as it was when it came off.
Hi Bob. Nice to hear from someone in the Home country:):) I understand about the marking. The castle nut is a royal pain to get just right. Socket wants to works its way out. As I was replacing the nut, marking would not have helped me. the inch pound wrench worked quite well. The car has been running like a champ. Glad you're enjoying the channel.
All the best
Cheers John.
Hello John. Another great video and very easy to understand. Greetings and good health from Germany
Thanks Thomas. Glad to know you enjoyed it. Cheers John.
Thank you for making this video. I learned a lot.
I'm glad you enjoyed it. Pinion seal is holding nicely. Cheers John.
Very Good John !! I admire and respect you for what you do with your cars. Take care
Thanks Duke! So appreciate all your help. Cheers John.
Test drive last night. No leaks and zero noise or clunking.
Perfect job. Never did that on my car out of fear. Now I will do it thanks to you great info. Thanks a lot!
Thanks Juan. I think you'll be fine with a step by step approach.
I test drove this afternoon and everything feels and sounds fine. No knocking or whining of any kind.
Cheers John.
Another brilliant clear video John.
Hopefully you've caught the leak in time. When I bought the car i found mine had leaked and destroyed the pivot bushing - metal on metal! And that bushing is a real PITA.
I think I did catch it in time. It was a small drip at first but in the last few weeks I noticed an increase. So it was time. I'll keep you posted. Cheers John.
Wow Very nice and interesting video! Thank you for sharing all your knowledge!! Now I will do it in my w124 differential, Thank you!!
Great video John, very informative and well presented. Well done bruvvver :)
I'm at the point now where I'm ready to set preload on the pinion in the diff case. Do I set the preload with or without the pinion seal in place? My w111 has a swing axle and so the diff case has a little cover that the seal fits into, then the flange goes on after the cover. Just trying to decide what the best process would be. I've read on other non-mercedes forums that if you do have the seal in place you should subtract around 3 inch pounds... Thanks for any advice!
Your w111 is the same as mine. But I'm a little confused, you have to put the seal in first then the flange is fitted, then you preload. Otherwise you would have to take the flange off again to fit the seal then you've lost preload. From memory the pinion preload has to have around 15 inch pound's of rotational torque. With everything together I believe its around 25 without any brake drag. Hope this helps. Cheers John.
@@mercedesmaintenance.6339 This answers my question, thanks so much 👍
Nice job. They can be bastards to do.
Thanks Christopher. Cheers John.