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Penetrating oil in fork

Old 06-19-20, 11:33 AM
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alij2018
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Penetrating oil in fork

I want to know if I can use penetrating oil in fork? I want to inject some oil in the travel tube. The penetration oil is Abro AB80 Spray Lubricant & Penetrating Oil. The purpose of it is to lubricate a little inside. I have the SR Suntour XCM30 coil fork.
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Old 06-19-20, 12:24 PM
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What's a 'travel tube'? If you mean the headset, then don't. The only lubricant that should be in a headset is bearing grease.
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Old 06-19-20, 01:46 PM
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Originally Posted by rollagain View Post
What's a 'travel tube'? If you mean the headset, then don't. The only lubricant that should be in a headset is bearing grease.
no the travel tube. Travel 100mm 120mm etc. The tubes.
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Old 06-19-20, 03:13 PM
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The telescoping suspension arms, then. I looked for information on just what this Abro was, but the company doesn't say what's in it. I assume it's something like WD-40.

It probably won't hurt anything, but you can find better stuff. My favorite light oil is Tri-Flow.

I have no experience with spring shocks, though. Can you find the fork manufacturer's recommendation?
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Old 06-19-20, 03:27 PM
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Might try asking in Mountain bikes if their not all out in the woods building ramps to jump over something completely insane.
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Old 06-20-20, 07:08 AM
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Originally Posted by alij2018 View Post
no the travel tube. Travel 100mm 120mm etc. The tubes.
I suggest googling “parts of a suspension fork” so people undertand what you are talking about and vice-versa. There is no such thing as a “travel tube”.

Are you talking about the stanchions? You want something to put on the stanchions that will work its way into the lowers?

Is this penetrating oil something that is used to free up stuck parts (like WD40)? If so I would definitely NOT use it.

The proper way to lubricate a fork that needs oil is (usually) to pull the lowers, clean them out, put them back on, and add oil through the bottom of the lowers.

Adding lubricant to the stanchions can cause more problems than it creates, unless it is something that dries and does not attract dirt. 99% of the lubrication happens INSIDE the fork. And if the seals of your fork are doing their job, most lubes won’t make it past them, anyway.

Last edited by Kapusta; 06-20-20 at 09:57 AM.
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Old 06-20-20, 08:50 AM
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I would not use penetrating oil as lubrication. Penetrating oil would may have additives designed to help dissolve rust in threads. I use WD-40 to get grease OFF of my leg if it brushes the chainrings. Nothing takes the grease OFF like it! What not use fork oil or just regular oil-why do you think you want penetrating oil?
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Old 06-20-20, 08:55 AM
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Old 06-20-20, 09:14 AM
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If you put oil in them it will eventually leak out the bottom.
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Old 06-20-20, 09:55 AM
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Originally Posted by dedhed View Post
That is a helpful video for changing the spring, but does not cover what the OP is trying to do. Here is a video that covers an actual servicing to clean and lube the lowers:


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Old 06-21-20, 03:46 AM
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To completely disassemble the fork in order to thoroughly clean and regrease everything, you'd need the Suntour proprietary tool for unscrewing the plastic top caps that hold the coil springs and other parts inside the stanchions; those plastic top caps are very soft and will round/crush if you try unscrewing with something like pipe wrench.

However, for a light maintenance that may not be necessary. Just unscrew the bolts at the end of the lowers and pull them off, then clean and regrease the stanchions and inside of the lowers, reassemble. It is a pretty simple task, see youtube videos for the correct procedure. There are dedicated greases for that, but pretty much any lighter (i.e. not very thick) grease should work. Worst that can happen is it gunks up sooner and you'd need to repeat the procedure.
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