Taking apart JBL 48 - Pensacola Fishing Forum

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Old 08-17-2014, 04:45 AM   #1
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Default Taking apart JBL 48

Does anyone have instructions on pulling the internal plugs on a JBL 48 aluminum spear gun?? It's getting water inside the tubes causing it to sink while in the water. Would like to replace them to make the gun bouyant again. I've looked on line and there is nothing anywhere regarding this. Any help is appreciated.
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Old 08-17-2014, 07:18 PM   #2
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It's been a while since I worked on one...but I think I remember removing the screws that hold on the muzzle and the trigger assy. - leaving you with just the tube.
There should be a plastic/rubber plug inside each end of the tube. I think I remember a screw that tightens them inside of the tube.
Sorry if my memory is wrong... Or design may be different on yours.
They aren't that complicated though....take note of how it is put together....then start taking it apart.
I'd worry more about making the seals work again than having too much difficulty with taking it apart and reassembly.
Doesn't look like parts are available....they want you to send it in for repair.
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Old 08-18-2014, 03:35 AM   #3
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You are right, problem comes when I try to yank the plugs out. I don't see or know how they are being held in place. The screw was removed that was inside the plug... Tried using a pick to remove, without success. Replaced screw partially and used pliers, no luck as well. Figure there must be a trick of sorts.

I was able to find the replacement parts on line. Was a dive shop, but slips my mind which one.

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Old 08-18-2014, 09:31 PM   #4
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When the screw is turned clockwise - it tightens the front and rear halves ....wedging and sealing itself into the tube. You need to put the screw back in ....but leave it sticking out about a quarter inch. Push or gently tap on the head of the screw to drive it back into the plug...and hopefully release the wedge.
Hope that does it.
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Old 08-18-2014, 11:55 PM   #5
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Will try that! Thanks!
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