Skil offers an oil specifically for the worm drive saws. That is the oil we use here in our shop. It is part #80111 and is available from http://www.ereplacementparts.com.
Thanks!
-Mark
part compatibility Question by ellis
I have a 77 super duty (the handle is part of the motor housing) ser #676063. Is the part #78 on the diagram the same dimensions as for this older model? What I need is a seal (retainer) to replace a CR 6570, the # on the seal in my old saw.
I just inherited a HD77 Type 15 saw. The extension spring is missing so the lower guard is loose and therefore it is hazardous to operate the saw. My question is how do I hook up the spring?
One end of the spring is flared the other has a hook on it. Thread the spring through the small hole located near the center of the lower guard. Pull the spring through the hole so that the flared end contacts the lower guard. Now you can attach the hooked end to the connection point on the inside, top, of the upper guard. Whit that the guard should now be functional.
Good luck with your repair!
-Mark
Oil Leak Question by Aaron Biesinger
My HD77 has leaked oil. I haven't discovered the source of the leak yet but want to repair it before I use the saw again to prevent additional damage. Any ideas on where and why oil is leaking?
Two of the more common areas we see leakage on the HD77 saws are the rear seal, item #78 on the parts diagram, or loose screws on the Guard Plate, item #1619X01255 on the parts diagram. After you diagnose and repair the leak, refill the saw with Skil Worm Gear Oil, part #80111. Hold the saw level and then fill the gearbox until the oil comes up to the bottom of the threads on the fill spout.
I hope this helps with your repair!
-Mark
oil Question by lonnie newell
My question is not really a repair question, but I'd like to know what type of oil is supposed to be used in these saws? and would it hurt the saw if I but lithium grease in it instead of oil?
Skil has a gearbox oil that is specifically for the worm drive saw. It is part #80111 and is available from http://www.ereplacementparts.com.
You do not want to use lithium grease in the gearbox. The worm drive saw requires an oil bath for lubrication. Grease will be flung off of the gears and will not lubricate them.
I hope this helps with your repair!
-Mark
brushes spark Question by Augusto
Hello. Can you tell me why the brushes spark is to high?
Excessive sparking inside the rear vent holes is caused by an armature that has gone bad. The armature has shorted out and is now arching. The armature shorted out due to excessive load, usually caused by the type of work that was being done or by an extension cord that was too long and its wire gauge too small. The armature will need to be replaced. Many times when an armature is damaged the field will be damaged as well. You will want to have the field tested to see if it was damaged.
Unfortunately the armature and field have been discontinued for this version of the hd77 saw. You will likely need to replace the saw.
Good luck!
-Mark
Review by tennessee jeb
i love this saw it is indestructible!! ive had it for about four or five years now and the only two things ive had to replace are the cord after a co worker cut it and now a trigger which is what brings me here my deck is bent a little also.
This is the best framing saw out there. It's heavy, but the balance is spot on. I have had several of these for over 10 years, and they run like the day they were new. I would never recommend another framing saw, the HD77 is all I need. I really hope Skil never changes anything on this saw.
L have owned and used this saw on construction sites, home repair and general wood cutting projects. It has served me well for 20 or so years and finally I must replace the trigger switch. The only maintenance ever done to it was to drain and replace the gear oil every two years, more often under heavy use. I have used it with a diamond blade to cut cementious siding and ceramic floor tiles. I have absolutely NO COMPLAINTS about my Skilsaw! Rather, I lavish praise on it for its' toughness, its' power and stability in use under harsh conditions and in the poshness of a workshop. It has never let me down.
My only regret is that the magnesium model was not available at the time I made my purchase. I still cannot justify replacing it with anything else!
The pivot plate that the bearing is seated in broke on my Skilsaw HD77 saw and I have to pull the bearing off to put on another pivot plate. Can I remove the bearing from the shaft with just a basic puller? If anyone has had to replace bearings or worm gears your input would be much appreciated.
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