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1Back to top Go down   stuck LH adjustable swing arm pivot Empty stuck LH adjustable swing arm pivot on Wed Oct 23, 2019 11:01 am

tinyspuds

tinyspuds
Gold member
Gold member
From all I’ve read I thought the right hand pivot would be the biggest problem. It was stuck but I solved it.
However the LH is a nightmare. I’ve seen one post that says they can get cross threaded. Anyone seen this, and what was the solution please?

The lock nut came off easily, but turning the hex got gradually tighter the further out I unwound it. 

Long story short, the LH trunnion will not wind out any further than what seems to be the end of the thread at the inside end and so won’t clear the swing arm. During this process I have rounded the allen socket so now stuck.

I’ve ordered a used trunnion pin (pretty certain that any solution will trash the old one) and 2 used locking nuts to see If I can get it turning again with a 27mm socket. failing that I might grind some flats into the threads and try a spanner.

Anyone encountered, solved, this problem?


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s.
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

2Back to top Go down   stuck LH adjustable swing arm pivot Empty Re: stuck LH adjustable swing arm pivot on Wed Oct 23, 2019 12:32 pm

charlie99

charlie99
VIP
VIP
often fitted with Loctite ....look for the Loctite dissolving fluid ...often just acetone based

or heat the area to burn off  the Loctite with a gas - propane torch

good luck


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%Ostuck LH adjustable swing arm pivot Au-log10

"redframe" rs "bitsa"  with many contributions from the k100 community ,,with many thanks
    

3Back to top Go down   stuck LH adjustable swing arm pivot Empty Re: stuck LH adjustable swing arm pivot on Wed Oct 23, 2019 1:26 pm

Laitch

Laitch
Life time member
Life time member
Applying Loctite to an adjustable fastener that has a lock fitting is a peculiar approach. Floggings are in order. If heat doesn't release it, let the pin cool.

Usually the pivot pin is backed out first until it is only slightly engaged with the swingarm then the fixed pivot is removed.

Perhaps the swingarm is bearing on the pivot pin because the swingarm is out of alignment. I might:

  • put a jack under the swingarm to support and align it,
  • screw the pivot pin in so its head is slightly more than the width of the locknut distant from the mounting hole,
  • hand tighten the locknut onto it,
  • pound a torx bit into the pin's damaged hex opening or unscrew the pin enough to attach a bolt extractor onto it—the two nut system might work too,
  • unscrew the pin until it stops,
  • spray Freeze Off or another freeze compound onto its shank up to the hole,
  • then extract it incrementally by back-and-forth rotation.


__________________________________________________
1995 K75 73,000 miles
stuck LH adjustable swing arm pivot Usa-lo10
    

4Back to top Go down   stuck LH adjustable swing arm pivot Empty Re: stuck LH adjustable swing arm pivot on Wed Oct 23, 2019 2:17 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Insert the fixed pin into the swing arm just enough to position the swing arm properly in the frame.  Then the other pin should come out easily if you haven't buggered the threads.

Have you removed the final drive, shock, caliper and drive shaft from the swing arm?  The pivots are the last thing to remove.


__________________________________________________
Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

5Back to top Go down   stuck LH adjustable swing arm pivot Empty Re: stuck LH adjustable swing arm pivot on Wed Oct 23, 2019 9:17 pm

RicK G

RicK G
VIP
VIP
It may be to late but you need to clean the thread that is protruding on the inside. You can get at it with a tooth brush and some degreaser. Best to remove the right side pin then turn the left adjuster in a turn or so then clean it.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

6Back to top Go down   stuck LH adjustable swing arm pivot Empty Re: stuck LH adjustable swing arm pivot on Fri Oct 25, 2019 3:32 pm

tinyspuds

tinyspuds
Gold member
Gold member
Thanks everyone, have tried all these but the freezing. Currently waiting for an epoxied lock nut to set and move forward from there.
In a year of working on the old girl with your support this is the first time I’ve felt proper stuck. Which is a credit to the designers and two fingers up to the loctite bu**er, which is what I think has happened.


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s.
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

7Back to top Go down   stuck LH adjustable swing arm pivot Empty stuck LH adjustable swing arm pivot on Fri Oct 25, 2019 5:36 pm

Tom FKR

Tom FKR
Life time member
Life time member
G'Day All,
This is probably a real dumb idea but is it possible to weld a nut or something to the pivot pin to help with the extraction.
Cheers
Tom


__________________________________________________
1986 K100RT Ex Police (Slightly modified)
2010 BMW F650GS Twin
1992 R100R
    

8Back to top Go down   stuck LH adjustable swing arm pivot Empty Re: stuck LH adjustable swing arm pivot on Fri Oct 25, 2019 7:32 pm

chris846

chris846
Life time member
Life time member
If it were nothing-left-to-try stuck, and beasting it would likely ruin the female thread in the gearbox, I'd drill, dremel and chisel the stud away from the inside.


__________________________________________________
The Longest Lunch
    

9Back to top Go down   stuck LH adjustable swing arm pivot Empty Re: stuck LH adjustable swing arm pivot on Sat Oct 26, 2019 5:35 am

Gaz

Gaz
Life time member
Life time member
I agree with Chris regarding drilling it out from the centre with increasing size drills. If you can get a hold of left hand drill bits (don't laugh, I have some) all the better.

Good luck.


__________________________________________________
Gaz
1990 K75 6427509; 1987 R80G/S PD 6292136; 2010 G650GS ZW13381; 95 K1100LT 0232224
    

10Back to top Go down   stuck LH adjustable swing arm pivot Empty Re: stuck LH adjustable swing arm pivot on Sat Oct 26, 2019 7:48 am

Dai

Dai
Life time member
Life time member
The final part of the problem is cleaning up the threads afterwards. IIRC they're a cycle pitch (very fine) and the cost of a tap is the value of three mortgages. Okay, so the 24mm one needed to do the Guzzi swingarm pivots was £74 but you get the picture.

















74 bloody quid just to do a thirty second cleanup job!!!!!!!!!!!!!!!!!!!!!!!!!!! affraid affraid affraid affraid affraid affraid affraid affraid affraid affraid affraid affraid affraid affraid affraid affraid


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'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

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