Discussion for the Skil HD77M (F012HM7702) 7 1/4" Magnesium Worm Drive Skilsaw
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Question: How To Remove Pivot Plate And Be...
How do you remove the pivot plate fig number 42 and the bearing fig number 14 from the Skilsaw HD77M worm gear set? Is there a way to domit without damaging it or should it all be replaced when replacing the worm gear set fig number 834? Thanks!
Reply: How To Remove Pivot Plate And Be...
If my memory serves me correctly the worm drive assembly has to be removed first then with some light tapping the drive gear assembly will pull out as an assembly.Hope that helps.Good luck.
Question: Base Plate
is there any other parts needed to renew the base on my hd77m type 1
Question: Removing Baseplate
How do I remove the basplate on my skill77 with magnesium plate? The pin is impossible to remove.
Reply: Removing Baseplate
You may want to try a little heat on the 1619X01263 pin. Usually this will help persuade it to come out.
Question: Baseplate (foot)
is the baseplate on the mag version of the HD77M the same as the -17 or the -72? Yes, I know the 77M plate is aluminum, but after using it on cement, it is a little rough for woodwork. Hoping the -17 steel plate will fit.
Reply: Baseplate (foot)
There will be no problem at all installing the standard Skil HD77 base plate on your HD77M. It is part number 1619X01350.
Question: Skilsaw Model 77, Worm Gears!
Has anyone tried substituting type 17 worm gears in a type 16 skilsaw? I have a model 77 '50th anniversary issue' worm drive and the gears are shot. Apparently the type 16 gears are no longer available, but since these saws didn't change much over time, I'm hoping the newer ones fit. Anyone?
Reply: Skilsaw Model 77, Worm Gears!
In answer to your question. The type 16 and type 17 gears are both different sizes and the housings are not the same. You might try some local repair centers to see if they have any of the older gears.
My wormdrive was sparking a lot on the back, replaced the brushes and is still sparking a bit more than normal. What else could it be?
The sparking you are seeing through the rear vent holes on the saw is caused by a bad armature. Many different things can cause the armature to go bad but the most common causes are using too long of an extension cord that is too small gauge or cutting in a manner that causes the saw to pull more amps than it can handle. (Such as deep cuts in concrete, etc.) The armature will need to be replaced.
There may have also been damage to the field. When you open the saw you will want to look for signs of burn or melted insulation on the armature and field. The field can also be tested with a multimeter set to test impedance (ohms). To test the field take an impedance reading from one side of the coil and then the other. The number you read from each side should be within a few ohms of the same. If it isn't the field is bad.
The armature is part #2610931892 and the field is part #1619P02674. Both of these parts are available from http://ereplacementparts.com.
Good luck with your repair!
Most likely the armature. It's about $60. Look for a little black spot on one of the commutator bars or connections, all it takes is one and the whole thing is no good.
Question: Skilsaw Model 77
I am looking for some parts on a skilsaw. I can't seem to find the right model number on the parts page. The model number is a 77 not the HD77. serial #1B504000. This is an older saw. What I am wondering is if the the parts are the same? What model number is the closest?
Reply: Skilsaw Model 77
I had a saw just like yours, but parts were getting harder to obtain, alot of the parts are no longer available. But I do have the parts list. Ill attach it here.
Question: SKILSAW HD77M Switch Replacement
I recently removed the switch on my saw to replace it.. forgot how it was wired..need rewiring info
Reply: SKILSAW HD77M Switch Replacement
Question: SkilSaw Mag 77 Worm Drive #HD77M
:Can anyone tell me what type of oil to put in it PLEASE???? :o:o:o Thank You : Dave
Reply: SkilSaw Mag 77 Worm Drive #HD77M
Skil sells gear oil for your saw. Can pick it up at most tool repair shops or Home Depot.
Reply: SkilSaw Mag 77 Worm Drive #HD77M
The parts # is 80111. They have it a ereplacementparts.com. Nice guys to deal with. They don't screw you on Freight. :)
Question: Worm Gear Compatibility?
I have a Skilsaw Model 77, type 16 (in fact it's the '50th anniversary issue'. I need to replace the worm gears. Are they available? Can I use the ones listed for the model 17?
Thanks for your help!
Reply: Worm Gear Compatibility?
The gears for the type 16 and type 17 are different and not interchangeable. Unfortunately the manufacture has discontinued the parts for the type 16. So either find a type 16 with good gears or time to purchase a new one.
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