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ND,
Mar/01/2015 at 02:36PM
 

Repairing the Crosman 130 failed pump arm pin weld

It looks like one side of the pin was never fused to the pump arm allowing it to rock back and forth until the gap became great enough to allow enough movement to weaken the holding weld and finally break free.

[image]
[image]

Since the integrity of the pump arm looks to be at least 90% it should take the weld just fine. The first thing to do is to machine a pin to a snug fit, making sure the width is the same as the arm. next is to direct the weld and heat to the pin and allow the material to flow over to the pump arm fusing them together.

[image]
[image]

With the Crosman 130 pump arm linkage pin machined and ready to go,
it's time for two spot welds.

[image]
[image]

The Spot weld on the Crosman 130 Pump arm pin looking through a 10 power lens, we can see good penetration and we have covered more steel with the weld then the factory weld.

[image]
Looking like better then 50% penetration with a bit of cleaning and some bluing this Crosman 130 is ready to put back together.


See all Crosman 130 repairs here

John

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1799 Postings in 498 Threads, 795 Members, 4 users online ( 0 Members, 4 Guests )