I have lost the "ball"

Does the motor hum when you pull the trigger? If so, check that the push tab for securing the shaft from turning while changing the blade is pulled out all the way. Sometimes fine saw dust can get inside and prevent the spring from pushing the tab back out all the way. If there is no hum, check the power source.

Use a safety pin (one of the larger, stout versions) to poke into the assembly and depress the retention bearing...

How to Replace a Lower Ball Joint (short, quick version ...

? 9:27
https://www.youtube.com/watch?v=E9O_cOB2MTI
May 27, 2014 - Uploaded by ChrisFix
Replacing a Lower Control Arm Ball Joint. Learn how to replace alower ball joint by pressing it out of the ...

Popular Mechanics - May 1975 - Page 164 - Google Books Result

https://books.google.com/books?id=auIDAAAAMBAJ
Vol. 143, No. 5 - ‎Magazine
I enclose check money order for $4.49 postpaid for each set ordered. ... Conversely, with a tension-loaded ball joint, force on the joint works to pull fast ball joints by taking pressure off primary load-carrier, here the lower ball joint of a torsion-barsuspension system. ... 1 shows the coil spring on top of the lower control arm.

Torsion bar removal - Ford F150 Forum - FordF150.net

Depending on the model, the collisse of the shaft can be faulty
en ,
The saw guide depends very much on the model machine and the applied drive.
Please note that the DEWALT reciprocating machines not for nothing under the group WOOD editing machines and not suitable to use as all demolition saw or saw for steel objects.

You can try spraying some lubricant into the blade holder. Sometimes the "ball" in the shaft gets stuck from dirt. Otherwise you will need to disassemble it by removing the roll pin that holds the collar on the shaft.

ok first this is in the chainsaw category and since they don't make one,, I'll assume you mean a sawzall, if you have the quick release ( which is a joke and is a bad part ) your going to have to breal off the blade at the section that it reduces ( where it goes into the holder) unscrew the ringnut that releases the blade, and take it all apart. be careful there is a ballbearing sitting inside there that will roll right out and naturally get lost in the mix. once apart you can remove the last of the blade. Now if your really lucky, you can clean it,, lightly oil this piece , and reassemble it,, and it will work, I have 3 and have replaced that part on all 3 of them,, Now if its an older model that still has the set screw hold down,, Just unscrew the setscrews and remove the blade, ( some have 2 some just one set screw depending on the model

Make sure the cord is out of the plug! grasp the knob where the blade enters the machine, turn it 1/4 turn R or L and pull the blade out

I would say its either in your cord(an open wire from wear) or the switch on the sawsall.
Try plugging it in and hold in the switch (dont have a blade in) move the cord around in different places to try to get it to work if thats not it and your brushes are ok its probably the switch. I ve replace bad switches in sawsalls before from wear. You can either go to your local electrical supply store that sells milwaukee and order one or I ve purchase them at Grainger parts too.

This is a jigsaw miscatagorized as a chainsaw. Do you have a blade big enough to drop 24" tree? We don't answer jig saw questions in the chainsaw section.

Spay inside where blade fits in with PB BLASTER & let set a while. Maybe you will get lucky & the blade will fall out as it should. If not then it will have to be dissembled in this area. There are 2 BB's inside that fit into the small hole on the blade. They are forced in by a spring, be careful not to lose these. Also check the accuatator when you pull the finger release, make sure it is going all the way or it is not broken, Good luck.