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Pusher Bolts

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PDehring View Drop Down
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    Posted: 09 Aug 2022 at 9:46am
I borrowed a set of 7/8"-12 pusher bolts for a 220 but found my wedges are 7/8"-9, which is a standard UNC thread.  I have another set of wedges for the 220 and they are 7/8"-12.  I didn't think AC used standard thread sizes on the wedges/pusher bolts.  

Anyone know why there is a difference or come across this before?
1937 M Crawler, 1963 D21, 1964 D21, 1965 D12 SIII, 1970 220, 1976 185
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DrAllis View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 09 Aug 2022 at 9:59am
Never ran into that before. Maybe (and that means maybe) very early 220's were different ???   or did someone run a tap thru the bushings changing them ??    12 pitch would have more pushing power than 9 pitch.

Edited by DrAllis - 09 Aug 2022 at 10:40am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote PDehring Quote  Post ReplyReply Direct Link To This Post Posted: 10 Aug 2022 at 7:47am
They were originally cut as 9tpi as they are clean threads.  A standard 7/8" bolt runs right in.  Its a 1970 model so not an early model but maybe they got switched out at some point?...

Edited by PDehring - 10 Aug 2022 at 8:05am
1937 M Crawler, 1963 D21, 1964 D21, 1965 D12 SIII, 1970 220, 1976 185
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jaybmiller Quote  Post ReplyReply Direct Link To This Post Posted: 10 Aug 2022 at 8:00am
OK, now I'm REAL curious...

WHAT are 'pusher ' bolts ?
I need to expand my collection of trivia ( like 113355, 355/113 = PI )
3 D-14s,A-C forklift, B-112
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Post Options Post Options   Thanks (0) Thanks(0)   Quote SteveM C/IL Quote  Post ReplyReply Direct Link To This Post Posted: 10 Aug 2022 at 8:06am
Jay,they are used to push the wheel hub off the axle wedge. Wedge has threads,hub has tapered hole bottom to match end of pusher bolt and leading inch plus of bolt has smaller diameter with no threads. Have been pictures of them on forum before
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steve(ill) View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 10 Aug 2022 at 8:37am
Like them all, but love the "B"s.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jaybmiller Quote  Post ReplyReply Direct Link To This Post Posted: 10 Aug 2022 at 8:49am
thank steve, YIKES !! $50 EACH !!!!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tbone95 Quote  Post ReplyReply Direct Link To This Post Posted: 10 Aug 2022 at 9:23am
Originally posted by jaybmiller jaybmiller wrote:

OK, now I'm REAL curious...

WHAT are 'pusher ' bolts ?
I need to expand my collection of trivia ( like 113355, 355/113 = PI )
113355, 355/113 = PI
Huh?

Assuming your comma is a decimal point, I get 1003.144735...)

If your comma not a decimal, then 1000 x above.

Guess you could say (113355, 355/113) - 1000 = PI ???

Then, you aren't even good to the 3rd decimal point.  Not even close to the ballparks I play in in my industry.  Shoot, good ol' 22/7 is closer than yours.  3.142857
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Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 10 Aug 2022 at 9:36am
355/113 =  3.1415   ....... dont know what the 113355 is for.

ok... its to memorize 11...33....55....
Like them all, but love the "B"s.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tbone95 Quote  Post ReplyReply Direct Link To This Post Posted: 10 Aug 2022 at 9:42am
Originally posted by steve(ill) steve(ill) wrote:

355/113 =  3.1415   ....... dont know what the 113355 is for.

ok... its to memorize 11...33....55....
Memorize. . . . .I didn't know you spoke Canadian.  Memorize, I thought mnemonic tricks were supposed to be easier to memorize than the thing itself?LOL
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tbone95 Quote  Post ReplyReply Direct Link To This Post Posted: 10 Aug 2022 at 9:43am
But I will give it credit, it IS close enough for my playground, though "just".  Wink
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Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 10 Aug 2022 at 2:54pm
oh, its closer than that...

PI =                      3.141592653589793238

355/113 =     3.14159292


Edited by steve(ill) - 10 Aug 2022 at 2:54pm
Like them all, but love the "B"s.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jaybmiller Quote  Post ReplyReply Direct Link To This Post Posted: 10 Aug 2022 at 3:18pm
yes, 355/113 just real easy to remember it a 113355....
it's the closest any pair of 3 digit integers can get to PI.
3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)

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Post Options Post Options   Thanks (0) Thanks(0)   Quote plummerscarin Quote  Post ReplyReply Direct Link To This Post Posted: 10 Aug 2022 at 5:37pm
Did someone say pie? I'd like blueberry please.
Pusher bolts in action
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 10 Aug 2022 at 7:07pm
And being done the right way with the axle keyway at 12 o'clock high.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mikez Quote  Post ReplyReply Direct Link To This Post Posted: 10 Aug 2022 at 9:11pm
How many do you need to do a wheel. I understand how they work, just wondering. Do you do both wedges or one at a time. 
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All four. Tighten each in succession until POP it is loose. I kept one regular bolt in loose so the wheel would not fall away from the hub.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote BrianC Quote  Post ReplyReply Direct Link To This Post Posted: 11 Aug 2022 at 6:59am
Which model Allis-Chalmers tractor first used this?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tbone95 Quote  Post ReplyReply Direct Link To This Post Posted: 11 Aug 2022 at 7:16am
Originally posted by steve(ill) steve(ill) wrote:

oh, its closer than that...

PI =                      3.141592653589793238

355/113 =     3.14159292
How do you know how close my playground is?  You don't.  We must use leads and helix angles calculated to .0000x.  So, the "9" above.  So like I said, barely close enough.  
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tbone95 Quote  Post ReplyReply Direct Link To This Post Posted: 11 Aug 2022 at 7:17am
Originally posted by jaybmiller jaybmiller wrote:

yes, 355/113 just real easy to remember it a 113355....
it's the closest any pair of 3 digit integers can get to PI.
Clear as mud.  If it works for you, good for you.  Personally, I can remember that fraction easier than your code for it.

I just use the Pi button on the calculator, or the Pi command/ constant in Excel, or programming language.  Then ya know you're good.Wink


Edited by Tbone95 - 11 Aug 2022 at 7:18am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Codger Quote  Post ReplyReply Direct Link To This Post Posted: 11 Aug 2022 at 7:26am
This must be why I've seen so many impact marks on older tractor hubs at work. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Unit3 Quote  Post ReplyReply Direct Link To This Post Posted: 11 Aug 2022 at 10:58pm
Originally posted by BrianC BrianC wrote:

Which model Allis-Chalmers tractor first used this?
??? D19 ???
2-8070FWA PS/8050PS/7080/7045PS/200/D15-II/2-WD45/WD/3-WC/UC/C
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Calvin Schmidt Quote  Post ReplyReply Direct Link To This Post Posted: 14 Aug 2022 at 10:21am
I'll have some 7/8" -12 pusher bolts for the two piece wedge available at Baraboo. Will be driving around in an orange golf cart with two white racing stripes and an A-C logo on front. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Michael V (NM) Quote  Post ReplyReply Direct Link To This Post Posted: 14 Aug 2022 at 11:08am
I only have 3, will that work? or do I need 1 more?
need to put an axle seal in the 7060,, and would like to move the centers 'in' few inches too

and find $80.00 for a 7/8"X12 tap.....


Edited by Michael V (NM) - 14 Aug 2022 at 11:10am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote BrianC Quote  Post ReplyReply Direct Link To This Post Posted: 14 Aug 2022 at 4:12pm
I lost track of the mission here. Are you in need of a set of custom 7/8"-9
jack bolts?
I would buy 7/8-9x10" long bolts (grade 5 about $20 each) and a 7/8-9 threading die.
Need to turn down the ends (lathe work). I assume 10" is long enough?
I own a lathe, so that is the way I would go. I make enough things out of common bolts.
Always cheaper than purchasing metal stock from McMasters and such.

Another way would be 7/8-9 all-thread rod and weld a hex nut on the end, plus the lathe work. However I don't know the "grade" of the all-thread rod. But the cheap way out.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 14 Aug 2022 at 8:51pm
Grade 5 quality for an axle wedge pusher bolt would be a bad idea. A 7060 requires FOUR pusher bolts if the wedges haven't been loosened in years. Three is useless. Sometimes if the wedges aren't terribly rusty, two will get the job done, but it's kind of rare.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tbone95 Quote  Post ReplyReply Direct Link To This Post Posted: 15 Aug 2022 at 6:38am
The coarser thread pitch is going to make it harder too if they're really stuck.  It's the mechanical equivalent of pushing a heavy load up a steeper incline.  But, we don't know how tough they're going to be to move.

I haven't seen it mentioned here, and maybe I was advised incorrectly years ago when I first got my 7045.  But I was advised to heavily and sequentially tighten the bolts, then whack the end of the axle with a sledge a few times, tighten, whack, repeat.  My right side which had probably been moved a few times may not have needed that.  The left however took me two more days, I'm pretty sure they would never have come loose without that shock/ vibration.  
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Post Options Post Options   Thanks (0) Thanks(0)   Quote PDehring Quote  Post ReplyReply Direct Link To This Post Posted: 15 Aug 2022 at 9:39am
Originally posted by DrAllis DrAllis wrote:

Never ran into that before. Maybe (and that means maybe) very early 220's were different ???   or did someone run a tap thru the bushings changing them ??    12 pitch would have more pushing power than 9 pitch.

I searched in the Knowledge Base forum but figured it would be useful to clarify/list the sizes of pusher bolts for what models they are used for.  Is the following correct?

3/4"-10 bolts are for models D19, D21, 190, 200 and 7000

7/8"-12 bolts are for models 210, 220, 7010-7080, and 8010-8070.  
1937 M Crawler, 1963 D21, 1964 D21, 1965 D12 SIII, 1970 220, 1976 185
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Post Options Post Options   Thanks (0) Thanks(0)   Quote injpumpEd Quote  Post ReplyReply Direct Link To This Post Posted: 15 Aug 2022 at 10:15am
yes, 7/8 would also cover the 4wd's, 7580, 8550, 4W220, 4W305. Easy to tell just by looking at the hub, if it's a triangle with three bolts, it's the smaller D19-7000 style. Remember some 7010, and possibly 7020's had a lower cost wedge with just 2 bolts on each half, but still the bigger HD style. Making your own out of grade 5 bolts would not work, anyone who has actually done this job knows, you need to spend the money and buy the right bolts and tap to avoid more difficulty. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mikez Quote  Post ReplyReply Direct Link To This Post Posted: 15 Aug 2022 at 11:09am
Nice info. Where do the 6000 fall in on the list.
Ed are you saying tap the threads first.


Edited by Mikez - 15 Aug 2022 at 11:13am
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