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  #11  
Old 08-27-2010, 03:19 AM
apoulos apoulos is offline
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Default Gearbox oil

I have finished making the 2 shafts of the gearbox and flipping both sets of gears (worm/worm gear, spur/ring gear). I got the Mobil SHC 634 oil, but want to know how much to put in. The manual says 2 to 3 ounces which doesn't seem like enough. I read somewhere else to lift saw to the top position and fill till it comes out of the fill hole. I estimate that would take about a quart which seems too much.

Pictures:
1. 2 old shafts in front, new ones in gearbox (temporary bolt holding worm gear in place until I put a grooved pin through it)
2. New 4 step pulleys from mcmaster.com. Old ones ruined.
3. New motor mount ears welding on and replaceable bronze bushings.
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  #12  
Old 08-27-2010, 11:11 AM
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Wellsir, looks like you're gonna have a whole new saw there.

Seems like it would have been easier to spruce up the wheels before you installed them.
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  #13  
Old 08-27-2010, 02:06 PM
apoulos apoulos is offline
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Cutter,
How much oil do you put in your gearbox?
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  #14  
Old 08-27-2010, 02:28 PM
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None.
The oil that was in it looked good so I left it alone.
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  #15  
Old 08-27-2010, 04:27 PM
apoulos apoulos is offline
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Casters touched up
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  #16  
Old 08-27-2010, 04:28 PM
apoulos apoulos is offline
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Needed to heat and straighten an old brazing repair job to the blade guide.
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  #17  
Old 08-27-2010, 05:00 PM
apoulos apoulos is offline
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Does your gearbox have the same fill and vent hole as the first picture shows?

In the second, I am using a welding rod as a dipstick. When I push the rod towards the bottom of the gearbox about 4" in, the oil appears to be about 3.5" from my fingers (see pictures 2 and 3). I put about 6 ounces of oil in when I rebuilt the gearbox.

If you stick a straight thin rod into the gearbox towards the bottom corner, how far is the oil from your fill hole? Let me know if you had the saw in the down or up position.

Thanks
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  #18  
Old 08-28-2010, 01:41 AM
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Quote:
Originally Posted by apoulos View Post
Cutter,

Thanks for the link. I will be using Mobil SHC 634 in my gearbox.

What do you use on your ring gear?
Is this the open gear you mentioned? It is not in a gearbox? Some thick grease should work on them if they are in the open.

Quote:
Originally Posted by apoulos View Post
Does your gearbox have the same fill and vent hole as the first picture shows?

In the second, I am using a welding rod as a dipstick. When I push the rod towards the bottom of the gearbox about 4" in, the oil appears to be about 3.5" from my fingers (see pictures 2 and 3). I put about 6 ounces of oil in when I rebuilt the gearbox.

If you stick a straight thin rod into the gearbox towards the bottom corner, how far is the oil from your fill hole? Let me know if you had the saw in the down or up position.

Thanks
The gearbox should have enough oil in it to at least come up halfway on the lowest shaft so it can throw the oil around inside. At least that's what I've been taught as a general rule.

Good work on the the saw.

John
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  #19  
Old 08-28-2010, 02:02 AM
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As long as the oil is on the lowest gear, but below the lowest seal, you should be in good shape.
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  #20  
Old 09-15-2010, 06:21 PM
Paul Cataldo Paul Cataldo is offline
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apoulos,
This damn forum just locked up on me and wouldn't post my typed response, so I have forgotten half of what I was going to say, but I do know I was going to comment on the gearbox oil on open gear lubricant.
Dake once had some very knowledgeable people answering their phones, and I used to speak with them regularly.
First off, DO NOT overfill that gearbox. 2-3oz is plenty. If you wish, you can do 3-4oz, but no more is needed. There needs to be just enough oil to wet the gears. That Mobil SHC gear oil is THICK stuff, and works well.
Your saw must have been neglected to have such worn worm gears (BTW, I am only trusting your word on this, because I personally cannot see the damage to the large bronze worm or the steel worm?? Where are the "grooves" ?? I'm sure it's just the pic, but I cannot see the wear).
Anyhow, I have torn apart quite a few of these old J and JH saws, and I have NEVER seen anything but PRISTINE looking worm gears come out of the gear boxes. SO, I'm just saying that unless your saw was run 24/7 for decades, I would bet it just got ran without oil in the gearbox for a while.
Anyhow, use Lubriplate Gear Shield on the drive wheel ring gear and tiny spur gear. It's great stuff, made for this purpose, and it doesn't attract nearly as much dust and debris as regular NLGI-2 grease that others have suggested.
Let me know if you have any other questions or concerns buddy. I am in the middle of yet another J-saw restoration project. I'm going back with the original Kysor 1970's green, as I usually do on the Kysors.
I'l try to post a pic if they are sized properly from the start. I can post them on all the other forums, but usually not here as they are always just the TINIEST bit too big for the rules here. It's frustrating because I cannot get cutters procedure to work for resizing pics.
Anyhow, a FEW of the pics I have on file are just barely small enough, thanks to others helping me downsize them jst a tad.
Let me see what I can come up with. I put so much time and work into the machinery restorations I do, that I get a kick out of showing them off from time to time! Hehe.
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