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Old 06-13-2009, 04:46 PM
checker758 checker758 is offline
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Join Date: May 2009
Location: Chicago
Posts: 169
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Default Re: How Do You Restore A Speed King - removing caps

Hi All,
Thought I'd share this helpful hint about removing Speed King grease caps with fellow Speed King owners.

I recently picked up my first Speed King, and it needed a good going over. I searched here and elsewhere online for recommendations on the best way to remove the grease caps, which are pressed tightly into their holes and not easily removed. No one seemed to have "the" answer. Someone said drilling a tiny hole in the top of the housing so you can insert a skinny implement and push the cap out from the inside works (but then you're left with a hole that needs to be filled, something I didn't want to do.) Someone elsewhere said that after you take the springs and pushrods out from the bottom, you can use an air compressor with some sort of fitting on the end of the hose that will fit into the hole at the bottom of the base to force the cap out with air pressure - I actually tried this with no luck, because I couldn't get a seal around the hole, and the other end where the cap and bearings are is isn't airtight either, so I couldn't get enough pressure. Elsewhere in this thread it was recommended that forcing grease into the hole will build up enough pressure to push the cap off from the inside - it seems like a good plan, but I didn't try this one because I don't have an automtive grease gun handy.

One suggestion I read elsewhere seemed logical and promising: use heat from a propane or similar torch to heat up the housing the cap is pressed into, being careful to not heat the cap as well, so that the expansion of the housing would allow the cap to come loose. But then someone else pointed out that this would damage the paint or the finish of the metal, and could damage or warp the housing and/or bearings as well.

I was thinking about this problem later, and had a sudden brainstorm. What if instead of using heat to expand the housing the cap is fitted into, you used COLD to just shrink the cap?

So here's what I did: first I sprayed some WD40 around the edges of the cap and let it soak into whatever microscopic gap there was between the cap and the housing. Then I grabbed a can of air used to blow dust off of computer keyboards. If you simply spray this air as directed, the temperature of the air is cool, but if you invert the can and spray while it's upside down, the spray comes out as a super-frigid liquid (cold enough to cause instant frostbite on your skin, so be careful!) Using this method I squirted the center of the grease cap for a couple of seconds until it was obviously frosted over. Then I gave it another squirt of WD40 to lubricate what I hoped was now a slightly opened gap around the grease cap. Another very quick squirt of 'liquid air', and then I tapped the pedal housing sharply a couple of times against a piece of wood (the edge of my work bench) so as not to damage the housing, and the cap popped out. Voila!

The entire time from "brainstorm" to "grease cap in hand" was about 3 minutes.

I hope this helps someone out!


Last edited by checker758; 06-14-2009 at 12:34 PM.
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