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Leaking final drive on HD16DC
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jerbob View Drop Down
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Joined: 07 Aug 2017
Location: Michigan
Points: 961 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jerbob Quote  Post ReplyReply Direct Link To This Post Posted: 28 Jan 2019 at 6:00am
Originally posted by Ian Beale Ian Beale wrote:

Just remember - if it isn't a bad leak the real problem is when it stops leaking


Meaning that when it stops leaking the final drive is out of oil correct Ian?
HD16DC, Bobcat 863 Turbo, Oliver 1855, John Deere 855,
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Joined: 03 Oct 2011
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Points: 934 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ian Beale Quote  Post ReplyReply Direct Link To This Post Posted: 27 Jan 2019 at 3:21pm
Just remember - if it isn't a bad leak the real problem is when it stops leaking
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jerbob View Drop Down
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Joined: 07 Aug 2017
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Points: 961 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jerbob Quote  Post ReplyReply Direct Link To This Post Posted: 27 Jan 2019 at 3:18pm
Originally posted by DMiller DMiller wrote:

The three threaded holes are Pusher Bolt holes to remove that assembly. Allis used a Particular Bladder type final seal, a Neoprene donut fiber reinforced with a internal and external steel squeeze plate spring loaded to keep the system under pressure to keep oil in dirt out. Check the parts lists at Minnpar if they do not have then do a Google search by Allis Chalmers and p/n. There may be a few still out there, I got the last known to exist for my 7G a few years back and nothing shows on searches anymore.


Have to remove the lower truck frame, roll it out of the way, pull sprocket then bearing support is accessible where that seal sits.



Crap! Thank you for the information
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Joined: 14 Sep 2009
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Points: 29655 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DMiller Quote  Post ReplyReply Direct Link To This Post Posted: 27 Jan 2019 at 8:33am
The three threaded holes are Pusher Bolt holes to remove that assembly. Allis used a Particular Bladder type final seal, a Neoprene donut fiber reinforced with a internal and external steel squeeze plate spring loaded to keep the system under pressure to keep oil in dirt out. Check the parts lists at Minnpar if they do not have then do a Google search by Allis Chalmers and p/n. There may be a few still out there, I got the last known to exist for my 7G a few years back and nothing shows on searches anymore.


Have to remove the lower truck frame, roll it out of the way, pull sprocket then bearing support is accessible where that seal sits.
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jerbob View Drop Down
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Joined: 07 Aug 2017
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Points: 961 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jerbob Quote  Post ReplyReply Direct Link To This Post Posted: 26 Jan 2019 at 3:50pm
Help from Michigan. I may have found my final drive leak issue. Still not sure why is started to leak just sitting but I started scraping and wire brushing where it showed a past leak behind the sprocket.

It’s not leaking from the Outboard Cover as it did previously and cleaned up all around the Final Drive Intermediate Pinion outer cover.

Found that there are 3 threaded holes without any bolts in them. Not sure if that would cause a leak and I also read that there are tapered threaded holes to use a tool to help pull cover off. I will send pics tomorrow.

Question: could this cause a leak as it is moist around the cover (they call it a cage in the shop manual) and can you remove this cover without pulling drive sprocket as it appears to have enough room to do so.

Thank you.
HD16DC, Bobcat 863 Turbo, Oliver 1855, John Deere 855,
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Joined: 07 Aug 2017
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Points: 961 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jerbob Quote  Post ReplyReply Direct Link To This Post Posted: 20 Jan 2019 at 12:51pm
Howdy

This one stumps me. This past summer I noticed a small on the right side final drive. I think it was Cal that said check outer cover as sometimes a leaking seal will occur under the bearing cover and follow face of final drive and appear to be leaking somewhere else. Cal was right. I torqued to specks, emptied final drive and refilled with 80/90 gear oil per speck. No leaked anywhere until today. I saw oil under final drive same as before and checked level and was down substantially.

What would cause a leak to start up just sitting still for at least 2 months.

It did drop down to 0 overnight. Metal contraction?
HD16DC, Bobcat 863 Turbo, Oliver 1855, John Deere 855,
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