Replacing seals in the 250 sl fork

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Don K
Posts: 5
Joined: Thu Jan 31, 2019 1:20 pm

Replacing seals in the 250 sl fork

Post by Don K »

Hello,

Stuck trying to get the hex bolt out of the damper rod. Tried compressing fork to put pressure on assembly but bolt just spins. Any ideas?

Thanks,
Don
viclioce
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Location: Santa Fe, NM
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Re: Replacing seals in the 250 sl fork

Post by viclioce »

Is the fork drained? And make sure the spring is in place to give downward pressure.

You might put some oil in it and cap it. Then put downward pressure on it.

1978 175SL
1976 03 Wombat
1975 99 Road Toad (2)
1973 96 Dirt Squirt (2)
1973 “Wombat Combat”
1973 Combat Wombat
1972 94 Wombat (2)
1972 Super Squirt
1971 92B+ Ace
1970 92B Ace 100B (2)
1968 92 Ace 100
1966 Ace 90
; D Victor
olddogs
Posts: 404
Joined: Mon May 05, 2014 8:30 am

Re: Replacing seals in the 250 sl fork

Post by olddogs »

Get a buddy to compress it as far as you
can upside down with the spring in, Use an air or electric powered gun to get the instant snap needed to break it loose. ratchet will just turn the damper rod in cicles. there are some gadgets you can fabricate to hold the damper rod, but the gun has always worked for me.
viclioce
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Joined: Mon Apr 21, 2014 5:35 pm
Location: Santa Fe, NM
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Re: Replacing seals in the 250 sl fork

Post by viclioce »

Yep! I’ve found a gun works well too. You can just get an inexpensive Allen wrench and cut off the 90 with a hack saw! Slips right into the chuck! :ugeek: Victor

1978 175SL
1976 03 Wombat
1975 99 Road Toad (2)
1973 96 Dirt Squirt (2)
1973 “Wombat Combat”
1973 Combat Wombat
1972 94 Wombat (2)
1972 Super Squirt
1971 92B+ Ace
1970 92B Ace 100B (2)
1968 92 Ace 100
1966 Ace 90
; D Victor
taber hodaka
Posts: 2240
Joined: Mon Jul 29, 2013 6:34 pm

Re: Replacing seals in the 250 sl fork

Post by taber hodaka »

The buddy I use is a ratchet strap. doesn't spill her coffee. -------------- Clarence
Don K
Posts: 5
Joined: Thu Jan 31, 2019 1:20 pm

Re: Replacing seals in the 250 sl fork

Post by Don K »

Thanks for the responses. Tried everything posted above without success. I'll try soaking in WD for a few days to see if it saturates the threads.

DK
olddogs
Posts: 404
Joined: Mon May 05, 2014 8:30 am

Re: Replacing seals ins the are inside the fork.be rusted athe 250 sl fork

Post by olddogs »

The threads should not be rusted as they are inside the fork but who knows on something this old. . Pull the spring and collapse the fork. See if the damper rod turns with the bolt. If it doesnt the rod is broken or the treads were stripped when it was assembled. Seen both. I have drilled the head off the bolt and then removed the rod by punching up on the stud left when the head was removed. You can then work on the damper/bolt on the workbench. if the drill bit spins the bolt, you can drill next to it and tap in a small roll pin to lock it in place as you remove just the head. Remember you only need to use a bit the size of the bolts shaft, not the heads diameter. The head will then pop right off.
Don K
Posts: 5
Joined: Thu Jan 31, 2019 1:20 pm

Re: Replacing seals in the 250 sl fork

Post by Don K »

Thanks, I'll give it a shot.

DK
viclioce
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Joined: Mon Apr 21, 2014 5:35 pm
Location: Santa Fe, NM
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Re: Replacing seals in the 250 sl fork

Post by viclioce »

Watching to see what your resolution is.... :ugeek: Victor

1978 175SL
1976 03 Wombat
1975 99 Road Toad (2)
1973 96 Dirt Squirt (2)
1973 “Wombat Combat”
1973 Combat Wombat
1972 94 Wombat (2)
1972 Super Squirt
1971 92B+ Ace
1970 92B Ace 100B (2)
1968 92 Ace 100
1966 Ace 90
; D Victor
gregg_floren
Posts: 111
Joined: Sun Jul 28, 2013 5:18 am

Re: Replacing seals in the 250 sl fork

Post by gregg_floren »

There was just another discussion on this group about how using a quality tool made for the job is so critical.

https://www.dssalesusa.net/store/p33/Ma ... -Tool.html

Spend the $25 one of these and use it with your 3/8 ratchet and extension. It holds the "innards" while you use the allen wrench on the bottom bolt. You won't regret it.

Plus Rob Stubblefield of Dennis Stubblefield Sales is a great supporter of our club. Makes high quality stuff.

Gregg
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socalhodaka
Posts: 927
Joined: Fri Jul 19, 2013 10:31 am

Re: Replacing seals in the 250 sl fork

Post by socalhodaka »

A 3/4 inch pipe 2 ft long, pinch in the end just a little.
500F0CD5-A170-45F7-BAEA-7A57EA9402DD.jpeg
162974CC-8658-45CD-BFB8-A397FAE81EEC.jpeg
User avatar
socalhodaka
Posts: 927
Joined: Fri Jul 19, 2013 10:31 am

Re: Replacing seals in the 250 sl fork

Post by socalhodaka »


href="http://youtu.be/tQUoWsGekH0">youtu.be/tQUoWsGekH0
Don K
Posts: 5
Joined: Thu Jan 31, 2019 1:20 pm

Re: Replacing seals in the 250 sl fork

Post by Don K »

I'm still struggling with this on both fork legs. I wonder if the last time the seals were replaced if lock tight wasn't used on the bolts.

I am going to buy the tool to assist.

Thanks,
Don
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socalhodaka
Posts: 927
Joined: Fri Jul 19, 2013 10:31 am

Re: Replacing seals in the 250 sl fork

Post by socalhodaka »

What bolts are you having issue with? The bottom allen?
Don K
Posts: 5
Joined: Thu Jan 31, 2019 1:20 pm

Re: Replacing seals in the 250 sl fork

Post by Don K »

Reporting back on this. I didn't pinch the 3/4 inch pipe but I did buy the tool from Stubblefield.
Worked like a charm. Whoever did this last did lock tight the bolts. Thanks for everyone's replies!

DK
viclioce
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Joined: Mon Apr 21, 2014 5:35 pm
Location: Santa Fe, NM
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Re: Replacing seals in the 250 sl fork

Post by viclioce »

When you put it back together, use a little anti-seize instead of loctite! :ugeek: Victor

1978 175SL
1976 03 Wombat
1975 99 Road Toad (2)
1973 96 Dirt Squirt (2)
1973 “Wombat Combat”
1973 Combat Wombat
1972 94 Wombat (2)
1972 Super Squirt
1971 92B+ Ace
1970 92B Ace 100B (2)
1968 92 Ace 100
1966 Ace 90
; D Victor
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