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PDehring 
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 Topic: Pusher Bolts
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?
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1937 M Crawler, 1963 D21, 1964 D21, 1965 D12 SIII, 1970 220, 1976 185
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DrAllis
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Posted: 09 Aug 2022 at 9:59am |
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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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PDehring
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Posted: 10 Aug 2022 at 7:47am |
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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
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1937 M Crawler, 1963 D21, 1964 D21, 1965 D12 SIII, 1970 220, 1976 185
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jaybmiller
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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 )
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3 D-14s,A-C forklift, B-112
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SteveM C/IL
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Posted: 10 Aug 2022 at 8:06am |
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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)
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Posted: 10 Aug 2022 at 8:37am |
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Like them all, but love the "B"s.
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jaybmiller
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Posted: 10 Aug 2022 at 8:49am |
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thank steve, YIKES !! $50 EACH !!!!
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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)
Never burn your bridges, unless you can walk on water
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Tbone95
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Posted: 10 Aug 2022 at 9:23am |
 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 )
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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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steve(ill)
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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....
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Like them all, but love the "B"s.
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Tbone95
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Posted: 10 Aug 2022 at 9:42am |
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? 
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Tbone95
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Posted: 10 Aug 2022 at 9:43am |
But I will give it credit, it IS close enough for my playground, though "just". 
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steve(ill)
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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
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Like them all, but love the "B"s.
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jaybmiller
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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.
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3 D-14s,A-C forklift, B-112
Kubota BX23S lil' TOOT( The Other Orange Tractor)
Never burn your bridges, unless you can walk on water
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plummerscarin
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Posted: 10 Aug 2022 at 5:37pm |
Did someone say pie? I'd like blueberry please. Pusher bolts in action 
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DrAllis
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Posted: 10 Aug 2022 at 7:07pm |
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And being done the right way with the axle keyway at 12 o'clock high.
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Mikez
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Posted: 10 Aug 2022 at 9:11pm |
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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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plummerscarin
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Posted: 10 Aug 2022 at 9:21pm |
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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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BrianC
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Posted: 11 Aug 2022 at 6:59am |
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Which model Allis-Chalmers tractor first used this?
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Tbone95
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Posted: 11 Aug 2022 at 7:16am |
steve(ill) wrote:
oh, its closer than that...
PI = 3.141592653589793238
355/113 = 3.14159292
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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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Tbone95
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Posted: 11 Aug 2022 at 7:17am |
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.
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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.
Edited by Tbone95 - 11 Aug 2022 at 7:18am
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Codger
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Posted: 11 Aug 2022 at 7:26am |
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This must be why I've seen so many impact marks on older tractor hubs at work.
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Unit3
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Posted: 11 Aug 2022 at 10:58pm |
BrianC wrote:
Which model Allis-Chalmers tractor first used this?
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??? D19 ???
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2-8070FWA PS/8050PS/7080/7045PS/200/D15-II/2-WD45/WD/3-WC/UC/C
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Calvin Schmidt
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Posted: 14 Aug 2022 at 10:21am |
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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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Michael V (NM)
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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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BrianC
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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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DrAllis
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Posted: 14 Aug 2022 at 8:51pm |
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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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Tbone95
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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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PDehring
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Posted: 15 Aug 2022 at 9:39am |
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.
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1937 M Crawler, 1963 D21, 1964 D21, 1965 D12 SIII, 1970 220, 1976 185
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injpumpEd
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Posted: 15 Aug 2022 at 10:15am |
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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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Mikez
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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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