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Skil Saw Model 77 - How to repair?



 
 
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  #1  
Old February 2nd 09, 10:38 PM posted to rec.woodworking
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Posts: 3
Default Skil Saw Model 77 - How to repair?

I have an old Skil Saw model 77 from the 1960's or so. There was a
problem with the switch, so I took it apart. There are two wires from
the motor that need to be replaced, so I then took the whole thing
apart. I thought replacing the wires would be an easy thing, but the
wires feed into something I don't know what it is called as seen in
the following pictu

http://img220.imageshack.us/my.php?image=010gy9.jpg

I'm fairly confident someone will offer up the solution to take it to
a repair guy, and I did, an authorized Skil Saw service center, and
the fella' there said it would be too much work. Now I am taking it
upon myself to make this thing work again.

In the picture there are two wires in the upper left hand corner.
These two wires need to be about 1/2" longer so that new terminals can
be attached in order to attach them to the trigger switch. You may say
to yourself, or me, to simply add wire to the existing wire. Well, the
existing wire is very old and is falling apart by just looking at it.
So, I would like to replace these two wires.

Questions:
What is the thing the wires connect to?
What is this method of wire connection?
Why are the wires attached this way?
How do I replace the wires?

If there is a better place to post this, please let me know.

Thanks!
Ads
  #2  
Old February 2nd 09, 11:04 PM posted to rec.woodworking
external usenet poster
 
Posts: 224
Default Skil Saw Model 77 - How to repair?



wrote in message
...
I have an old Skil Saw model 77 from the 1960's or so. There was a
problem with the switch, so I took it apart. There are two wires from
the motor that need to be replaced, so I then took the whole thing
apart. I thought replacing the wires would be an easy thing, but the
wires feed into something I don't know what it is called as seen in
the following pictu

http://img220.imageshack.us/my.php?image=010gy9.jpg

I'm fairly confident someone will offer up the solution to take it to
a repair guy, and I did, an authorized Skil Saw service center, and
the fella' there said it would be too much work. Now I am taking it
upon myself to make this thing work again.

In the picture there are two wires in the upper left hand corner.
These two wires need to be about 1/2" longer so that new terminals can
be attached in order to attach them to the trigger switch. You may say
to yourself, or me, to simply add wire to the existing wire. Well, the
existing wire is very old and is falling apart by just looking at it.
So, I would like to replace these two wires.

Questions:
What is the thing the wires connect to?


Looks like the field coil assembly.

What is this method of wire connection?


Somewhere in there, the stranded wire is soldered to a thin wire which makes
the winding.

Why are the wires attached this way?


Because that's the way Edison (or Tesla maybe) did it and it was good enough
for him. (Joking)

How do I replace the wires?


The best way you see fit. If it were mine, I'd strip the wire back an inch
or so and using a bell splice (and solder), I'd add a couple inches of good
(new) wire. then, I'd cover the length of old wire, the splice and an inch
or so with shrink tube. Then I'd cut the new wire off as needed and attach
to the switch.

Trying to get into the coil to attach new wires is going to be quite the
task...

Best of luck.

Ed

  #3  
Old February 3rd 09, 03:10 AM posted to rec.woodworking
external usenet poster
 
Posts: 3
Default Skil Saw Model 77 - How to repair?

On Feb 2, 5:04*pm, "Ed Edelenbos" wrote:
wrote in message

...



I have an old Skil Saw model 77 from the 1960's or so. There was a
problem with the switch, so I took it apart. There are two wires from
the motor that need to be replaced, so I then took the whole thing
apart. I thought replacing the wires would be an easy thing, but the
wires feed into something I don't know what it is called as seen in
the following pictu


http://img220.imageshack.us/my.php?image=010gy9.jpg


I'm fairly confident someone will offer up the solution to take it to
a repair guy, and I did, an authorized Skil Saw service center, and
the fella' there said it would be too much work. Now I am taking it
upon myself to make this thing work again.


In the picture there are two wires in the upper left hand corner.
These two wires need to be about 1/2" longer so that new terminals can
be attached in order to attach them to the trigger switch. You may say
to yourself, or me, to simply add wire to the existing wire. Well, the
existing wire is very old and is falling apart by just looking at it.
So, I would like to replace these two wires.


Questions:
What is the thing the wires connect to?


Looks like the field coil assembly.

What is this method of wire connection?


Somewhere in there, the stranded wire is soldered to a thin wire which makes
the winding.

Why are the wires attached this way?


Because that's the way Edison (or Tesla maybe) did it and it was good enough
for him. *(Joking)

How do I replace the wires?


The best way you see fit. *If it were mine, I'd strip the wire back an inch
or so and using a bell splice (and solder), I'd add a couple inches of good
(new) wire. *then, I'd cover the length of old wire, the splice and an inch
or so with shrink tube. *Then I'd cut the new wire off as needed and attach
to the switch.

Trying to get into the coil to attach new wires is going to be quite the
task...

Best of luck.

Ed


Ed,

Thanks for the tip. I spliced new wire just before the field coil
assembly and put everything back together with only a few spare parts
left over. I then plugged the saw into power with no popped circuits.
Next I squeezed the trigger and did not get a positive result. There
was a low frequency "gzzzz" followed by a mild expletive. I then
unplugged the thing and scratched my head.

Do you know if the two wires coming from the motor must be in a
specific order on the switch?

Any suggestions on how to troubleshoot this?

Thanks,
Ted
  #4  
Old February 3rd 09, 04:33 AM posted to rec.woodworking
external usenet poster
 
Posts: 3
Default Skil Saw Model 77 - How to repair?

On Feb 2, 9:10*pm, wrote:
On Feb 2, 5:04*pm, "Ed Edelenbos" wrote:



wrote in message


....


I have an old Skil Saw model 77 from the 1960's or so. There was a
problem with the switch, so I took it apart. There are two wires from
the motor that need to be replaced, so I then took the whole thing
apart. I thought replacing the wires would be an easy thing, but the
wires feed into something I don't know what it is called as seen in
the following pictu


http://img220.imageshack.us/my.php?image=010gy9.jpg


I'm fairly confident someone will offer up the solution to take it to
a repair guy, and I did, an authorized Skil Saw service center, and
the fella' there said it would be too much work. Now I am taking it
upon myself to make this thing work again.


In the picture there are two wires in the upper left hand corner.
These two wires need to be about 1/2" longer so that new terminals can
be attached in order to attach them to the trigger switch. You may say
to yourself, or me, to simply add wire to the existing wire. Well, the
existing wire is very old and is falling apart by just looking at it.
So, I would like to replace these two wires.


Questions:
What is the thing the wires connect to?


Looks like the field coil assembly.


What is this method of wire connection?


Somewhere in there, the stranded wire is soldered to a thin wire which makes
the winding.


Why are the wires attached this way?


Because that's the way Edison (or Tesla maybe) did it and it was good enough
for him. *(Joking)


How do I replace the wires?


The best way you see fit. *If it were mine, I'd strip the wire back an inch
or so and using a bell splice (and solder), I'd add a couple inches of good
(new) wire. *then, I'd cover the length of old wire, the splice and an inch
or so with shrink tube. *Then I'd cut the new wire off as needed and attach
to the switch.


Trying to get into the coil to attach new wires is going to be quite the
task...


Best of luck.


Ed


Ed,

Thanks for the tip. I spliced new wire just before the field coil
assembly and put everything back together with only a few spare parts
left over. I then plugged the saw into power with no popped circuits.
Next I squeezed the trigger and did not get a positive result. There
was a low frequency "gzzzz" followed by a mild expletive. I then
unplugged the thing and scratched my head.

Do you know if the two wires coming from the motor must be in a
specific order on the switch?

Any suggestions on how to troubleshoot this?

Thanks,
Ted


I found a schematic of a newer 77:

http://www.toolpartsdirect.com/cgi-b....cgi/skil/HD77

The schematic shows how the wiring should go...
  #5  
Old February 5th 09, 04:56 AM posted to rec.woodworking
external usenet poster
 
Posts: 14
Default Skil Saw Model 77 - How to repair?

It might be helpful to know what the few spare parts are that you had left
over. It sounds like a misalignment problem. If the field laminations and
the armature laminations are touching, they will grab onto each other and
all you will get is a buzzing noise. There is no polarity to the two wires
going to the switch, so as long as you are hooking up the two motor wires to
the same two terminals on the switch you are fine.

Try this: make sure the saw is unplugged. Look through the ventilation slots
and see if you can see the fan on the armature. Use a small screwdriver and
see if you can turn the fan blade all the way around easily. If you
encounter any binding, then there is something misaligned between the fields
and armature.
Doug

wrote in message
...
On Feb 2, 9:10 pm, wrote:
On Feb 2, 5:04 pm, "Ed Edelenbos" wrote:



wrote in message


...


I have an old Skil Saw model 77 from the 1960's or so. There was a
problem with the switch, so I took it apart. There are two wires from
the motor that need to be replaced, so I then took the whole thing
apart. I thought replacing the wires would be an easy thing, but the
wires feed into something I don't know what it is called as seen in
the following pictu


http://img220.imageshack.us/my.php?image=010gy9.jpg


I'm fairly confident someone will offer up the solution to take it to
a repair guy, and I did, an authorized Skil Saw service center, and
the fella' there said it would be too much work. Now I am taking it
upon myself to make this thing work again.


In the picture there are two wires in the upper left hand corner.
These two wires need to be about 1/2" longer so that new terminals can
be attached in order to attach them to the trigger switch. You may say
to yourself, or me, to simply add wire to the existing wire. Well, the
existing wire is very old and is falling apart by just looking at it.
So, I would like to replace these two wires.


Questions:
What is the thing the wires connect to?


Looks like the field coil assembly.


What is this method of wire connection?


Somewhere in there, the stranded wire is soldered to a thin wire which

makes
the winding.


Why are the wires attached this way?


Because that's the way Edison (or Tesla maybe) did it and it was good

enough
for him. (Joking)


How do I replace the wires?


The best way you see fit. If it were mine, I'd strip the wire back an

inch
or so and using a bell splice (and solder), I'd add a couple inches of

good
(new) wire. then, I'd cover the length of old wire, the splice and an

inch
or so with shrink tube. Then I'd cut the new wire off as needed and

attach
to the switch.


Trying to get into the coil to attach new wires is going to be quite the
task...


Best of luck.


Ed


Ed,

Thanks for the tip. I spliced new wire just before the field coil
assembly and put everything back together with only a few spare parts
left over. I then plugged the saw into power with no popped circuits.
Next I squeezed the trigger and did not get a positive result. There
was a low frequency "gzzzz" followed by a mild expletive. I then
unplugged the thing and scratched my head.

Do you know if the two wires coming from the motor must be in a
specific order on the switch?

Any suggestions on how to troubleshoot this?

Thanks,
Ted


I found a schematic of a newer 77:

http://www.toolpartsdirect.com/cgi-b....cgi/skil/HD77

The schematic shows how the wiring should go...


 




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