Author Topic: Beginners luck, main rear seal replacement  (Read 4353 times)

Offline cgdan

  • Motobrick Curious
  • Posts: 35
Beginners luck, main rear seal replacement
« on: September 05, 2016, 03:15:40 PM »
Dear All,

After much agonising, with slight oil leak below the clutch housing I am attempting a main rear seal, doing replacement and spline lube. I am 6 hours in so far, ( but I am very slow and only have been able to do it in 3 two hour evenings so far. After much advice from this forum I dove in.....

Tips I have learned so far....

Buy seal removing tool and some rather Allen keys for a small socket set.

You can make a rear seal drift out of a 2/3 used roll of masking tape and a lump of 4 x 2

Your wife's nail polish can be used to mark clutch assembly

To remove the o ring in one piece pull back clutch assembly (not very hard) as far as it will go then twist antiockwise slightly. This snags the o ring on the thread of the shaft. Then give the clutch housing a tap back and hey presto, you can grab the o ring with a pair of thin nose pliers.

If the outer part of the clutch is engaged on a locating pin after removing the 6 bolts, don't give up. Keep tapping all round the housing and pulling it will come off. Just be patient, take a few breaks, better than breaking it.

On reassembledly stage now.....
  • United Kingdom
  • 1991 K100 LT

Offline jay1622

  • ^ Proficient Motobricker
  • Posts: 283
Re: Beginners luck, main rear seal replacement
« Reply #1 on: September 05, 2016, 03:21:59 PM »
Awesome to see you've jumped in! Have you managed to decipher where to grease the clutch parts on disassembly?

Kudos Sir!
  • Charlotte
  • Previous: 1986 K75S, 1977 R75/7, 1999 R1200C, 2003 R1150GS, 2001 F650GS, 2005 R1200RT... Current: 2005 R1200RT and my Brick, a 1988 K75S

Offline cgdan

  • Motobrick Curious
  • Posts: 35
Re: Beginners luck, main rear seal replacement
« Reply #2 on: September 05, 2016, 03:51:49 PM »
Oooh, haven't got that far. Was going to read my manuals my mate dropped off over the weekend. Was thinking of copper slip on the locator pins for a start....

Forgot to order new clutch centre bolt (doh) so don't think that will turn up till Wednesday....
  • United Kingdom
  • 1991 K100 LT

Offline cgdan

  • Motobrick Curious
  • Posts: 35
Re: Beginners luck, main rear seal replacement
« Reply #3 on: September 05, 2016, 03:54:22 PM »
Oh and forgot to mention, o ring was fine, main seal was leaking. How weird?! Still replaced both......
  • United Kingdom
  • 1991 K100 LT

Offline Martin

  • ^ Quintessential Motobricker
  • Posts: 4475
Re: Beginners luck, main rear seal replacement
« Reply #4 on: September 05, 2016, 04:13:37 PM »
While you are waiting, you might consider fitting a grease nipple to your clutch pivot arm. The arm is subject to water and dirt ingress, fitting a nipple allows you to push the crap out and also eases the clutch pull. Easy job just drill the hole and tap it to the size of the nipple.
Regards Martin.
  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

Offline cgdan

  • Motobrick Curious
  • Posts: 35
Re: Beginners luck, main rear seal replacement
« Reply #5 on: September 05, 2016, 05:05:03 PM »
Cor thanks, I got a tap and die set the other week for removing my exhaust on the cg, I'll do that tomorrow  :bmwsmile. By the way, here is my patent seal drift......
  • United Kingdom
  • 1991 K100 LT

Offline Martin

  • ^ Quintessential Motobricker
  • Posts: 4475
Re: Beginners luck, main rear seal replacement
« Reply #6 on: September 05, 2016, 05:42:03 PM »
 :2thumbup: Been there done something similar turned up a hunk of wood on my metal lathe. :hehehe
Regards Martin
  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

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