610 Jigsaw

yellowbug · Post by **yellowbug** » Sat Jun 22, 2013 7:43 am

How do I disassemble the top head from the C arm?

SDSSmith · Post by **SDSSmith** » Sat Jun 22, 2013 9:00 am

yellowbug wrote:How do I disassemble the top head from the C arm?

You need to remove the top cover from the head which reveals a bolt. That bolt holds the head to the eccentric which is wedged into the arm. Remove the bolt and the head comes off. You will need to squeeze the eccentric to remove it from the arm. The square nut the bolt went into can be retrieved from inside the arm. When reassembling you will loosely attach the head to the eccentric with the bolt and square nut and re-insert it into the arm (again squeezing the eccentric). The eccentric allows aligning the upper blade block with the lower block. Hope this helps.

yellowbug · Post by **yellowbug** » Sun Jun 23, 2013 4:17 am

Thanks!

How do you squeeze the eccentric, is there a special tool ?

pieceseeker · Post by **pieceseeker** » Sun Jun 23, 2013 8:45 am

The easiest way I found to separate the upper head from the "C" arm is:

Take the top cover off

Remove blade and upper chuck assembly

Unscrew the bolt inside the back of the pump housing about a 1/2" ...this retains the square nut so retrieval is unnecessary

You'll notice that there is an aluminum sleeve (you only see a collar at this point) between the arm and the upper air pump body. This sleeve is split so that it spreads over a tapered tail (part of the upper body). That is the locking mechanism.

Scroll down the page to see a disassembled head.
http://www.shopsmith.net/forums/showthr ... 636&page=5

Use a wedge (screw driver, whatever) between that aluminum collar and the upper pump body in order to separate the two. Only a small distance should be required to loosen the wedging action.

If need be, use a block of wood and hammer and tap on the back of the pump body (housing...painted gray) to separate from the "C" arm.

If the assembly is being stubborn...at that point, when the body is far enough away from the arm, you can use large pliers to squeeze the aluminum collar where it is split.

BTW, what are you planning to do?

yellowbug · Post by **yellowbug** » Sun Jun 23, 2013 3:57 pm

The housing is out of square, plus I want to blast and paint the c arm..
Thanks for the info

pieceseeker · Post by **pieceseeker** » Sun Jun 23, 2013 5:28 pm

The housing is out of square?

SDSSmith · Post by **SDSSmith** » Sun Jun 23, 2013 6:25 pm

yellowbug wrote:Thanks!

How do you squeeze the eccentric, is there a special tool ?

A C clamp.

JPG · Post by **JPG** » Mon Jun 24, 2013 12:18 am

SDSSmith wrote:A C clamp.

A large channel lock pliers.

SDSSmith · Post by **SDSSmith** » Mon Jun 24, 2013 10:35 am

[quote="JPG40504"]A large channel lock pliers.]Your choice, not mine. The material is too soft and the channel lock teeth are too hard for my liking.

JPG · Post by **JPG** » Mon Jun 24, 2013 12:17 pm

SDSSmith wrote:Your choice, not mine. The material is too soft and the channel lock teeth are too hard for my liking.

Ahh but the 'large' size has 'large' flat areas at the outside end of the jaws.]knurling[/B] things either.