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1958 HD-5G into the fold:

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    Posted: 20 Dec 2025 at 4:49pm
Widow is downsizing on retained possessions. I've known the tractor which is complete for a lot of years. However, it's not been ran in about six years. Engine is not frozen and I don't know about the steering clutches, but u/c appears to be in fair condition. It also has the bolt on grouser segments on top of the street pads. Story is the tractor was used to dig the basement to the house addition, and then put into the barn. There it remained not coming out till a couple of weeks ago to convert the parking space to a horse stall.

I'll haul it home after the first of the year when insurances go into effect for my tractor and trailer.   
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Les Kerf Quote  Post ReplyReply Direct Link To This Post Posted: 20 Dec 2025 at 8:12pm
Sweet! Smile
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Coke-in-MN Quote  Post ReplyReply Direct Link To This Post Posted: 20 Dec 2025 at 11:08pm
Last of the HD5 machines was 1955 , 
If you find the Serial # on dash plate or on the rear casting it can confirm the year built 
Lot of small changes over years of production , improvements to loader frame are some along with the 2 speed reverse transmission . 
 With the loader pads without single grouser I dug many basements, put in drives, loaded many trucks and leveled many yards . Bought mine in 1972 and still have it , a 1955 HD5G - had 3 others 5G machines I sold and 1 HD5B from 1948 to 1955 machines  
Life lesson: If you’re being chased by a lion, you’re on a horse, to the left of you is a giraffe and on the right is a unicorn, what do you do? You stop drinking and get off the carousel.
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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: 21 Dec 2025 at 9:43pm
Ahhhh the sound of that 2-71 Detroit.....
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Codger Quote  Post ReplyReply Direct Link To This Post Posted: 22 Dec 2025 at 10:19am
I'll be over there later today and look for a data plate. She thought it was a 1958 build and seemed pretty certain, but obviously there could be disparity.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Coke-in-MN Quote  Post ReplyReply Direct Link To This Post Posted: 22 Dec 2025 at 11:16am
Age of build can make some differences but overall interchange of any needed parts stays the same . Track , undercarriage , even full rear housing and components were used on the HD6 machines . Loader differed as did engine , but then the HD6 had updates also so from early first machines to last produced a lot of changes , the HD5 over the years just had small ones .
 On the HD5G the big changes were in 2 speed reverse , 4 speed rather than 5speed , the loader frame front cross member going from box tube to round tube with welded brackets reinforcing round tube . pin length in upper fitment to loader frame 
Life lesson: If you’re being chased by a lion, you’re on a horse, to the left of you is a giraffe and on the right is a unicorn, what do you do? You stop drinking and get off the carousel.
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All levers and handles operate smoothly with even spring tension behind them. She said it pulled very easy with the 4020 Deere tractor. I didn't sit in it so don't know about the transmission shifting but the hand clutch feels as it should.

Drizzling out when the photos were taken and my phone shuts down on "humidity" constantly if out of the holder in this cool weather very long. I'm told the machine ran/operated well but was loud in a push...... 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DiyDave Quote  Post ReplyReply Direct Link To This Post Posted: 22 Dec 2025 at 3:33pm
Some rather odd looking pads on the tracks, first time I've ever seen that.  Any story behind it?

Edited by DiyDave - 22 Dec 2025 at 3:34pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Codger Quote  Post ReplyReply Direct Link To This Post Posted: 22 Dec 2025 at 7:12pm
I've seen those pads in the past but been a lot of years ago.

Few more photos:




Bucket cutting edge is broken out badly but I didn't snap a photo of it. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Coke-in-MN Quote  Post ReplyReply Direct Link To This Post Posted: 22 Dec 2025 at 10:17pm
The Allis Chalmers HD5G with serial number 21073 was likely manufactured in 1954. The HD5 line was produced from 1946 to 1955, with a total of over 29,000 units built. 
Life lesson: If you’re being chased by a lion, you’re on a horse, to the left of you is a giraffe and on the right is a unicorn, what do you do? You stop drinking and get off the carousel.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Coke-in-MN Quote  Post ReplyReply Direct Link To This Post Posted: 22 Dec 2025 at 10:21pm
This is the counterweights on my HD5G - something I notice you are missing . Careful when using bucket as overloading machine without some counterweight will overload front idler axle and wheel bearings - Had 3 front idlers all with bent axles from machines I worked on and sold 



Edited by Coke-in-MN - 22 Dec 2025 at 10:24pm
Life lesson: If you’re being chased by a lion, you’re on a horse, to the left of you is a giraffe and on the right is a unicorn, what do you do? You stop drinking and get off the carousel.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Coke-in-MN Quote  Post ReplyReply Direct Link To This Post Posted: 22 Dec 2025 at 10:29pm
HD5G 26784 1955 I bought it in 1972 and still have it 
Life lesson: If you’re being chased by a lion, you’re on a horse, to the left of you is a giraffe and on the right is a unicorn, what do you do? You stop drinking and get off the carousel.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Codger Quote  Post ReplyReply Direct Link To This Post Posted: 23 Dec 2025 at 4:38am
Thanks Coke. No idea to any of this myself. Looks like it's been a long time, (if ever) this machine had counterweights installed. Those on your machine appear to be cast iron/steel composition. If the machine proves serviceable when it's back at the shop, I'll give it a good pressure washing and remove the tracks to evaluate u/c further, and fully. It looks fair setting there with plenty of adjustment left, and there was no mention of any track walking off, but I'd like to evaluate the front idlers, bearings, etc. before pressing it into any kind of service as it will be kept several miles distant from the shop. 

I did snap this but neglected to post earlier. No idea if it reveals anything to the discerning eye or not:

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Post Options Post Options   Thanks (0) Thanks(0)   Quote wjohn Quote  Post ReplyReply Direct Link To This Post Posted: 23 Dec 2025 at 7:42pm
Are you planning on shoving it onto your trailer or trying to get it running where it sits?
1939 B, 1940 B, 1941 WC, 1951 WD, 1952 CA, 1956 WD-45
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Codger Quote  Post ReplyReply Direct Link To This Post Posted: 25 Dec 2025 at 5:48pm
Most likely I'll winch it up onto the trailer and use the shop gantry to install a 4D battery. Getting too old to hike those up onto my shoulder any longer..... 

Engine is not frozen as I can pull it around by hand. Hopefully no stuck injectors but will find out soon enough.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Coke-in-MN Quote  Post ReplyReply Direct Link To This Post Posted: 06 Jan 2026 at 11:25am
I use a single 12V battery in mine , a 800 AH automotive battery , that I also use in pickkup snow plowing truck .
 Changed out starter to M42 late Delco starter with solonoid so have a key switch start now . Also changed out generator and now using 1OSI automotive alternator single wire hookup by changing front pulley that I machined to take a B width belt . 
 One problem that shows up is sloppy shift lever when the internal parts on lever wear . it's a easy fix by replacing the side bolts in tower and the cross pin along with the round tube the pin and bolts fit into . 
Life lesson: If you’re being chased by a lion, you’re on a horse, to the left of you is a giraffe and on the right is a unicorn, what do you do? You stop drinking and get off the carousel.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Codger Quote  Post ReplyReply Direct Link To This Post Posted: 16 hours 54 minutes ago at 7:43pm
I have both 4D, and 31 threaded posts at the shop. I swapped the 11B over to group 31 top post types as that engine readily fires in the coldest of weather. I agree the 10SI is the way to go and the types that pull in at 1000rpm seem to be pretty reliable. Have a couple of 2600 L-N that are fresh from the rebuild shop and not used, but that is a larger frame than the 10SI. I've not been back over there since Christmas Eve so don't know fitment requirements. Regardless, it will be converted to a one wire, (or self exciting) setup. Gear selector felt quite tight in the rails, and gates so hopefully won't require any work but you never know till it's operated.   
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Les Kerf Quote  Post ReplyReply Direct Link To This Post Posted: 6 hours 14 minutes ago at 6:23am
The 2-71 DD in my Son-in-law's HD5G has a twin belt drive; I removed the pulley from the generator and put it on a Delco one-wire 10SI alternator, then modified the mounting to suit.

His gear shifter was quite sloppy, I posted a thread about rebuilding it several years ago.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Codger Quote  Post ReplyReply Direct Link To This Post Posted: 5 hours 22 minutes ago at 7:15am
Thanks guys. I should be over there this afternoon and I'll look a bit closer at the existing setup. Lost the alternator on my air compressor yesterday it seems as it won't pull in any longer. Napa supplied 10SI "one wire" setup that is about four years old. It has always been very slow to pull in but once engaged, seemed to work fine. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Codger Quote  Post ReplyReply Direct Link To This Post Posted: 4 hours 49 minutes ago at 7:48am
Went ahead and picked up a low rpm pickup 10SI One wire 105A alternator from Amazon this morning. Ebay had the conversion sheave for a 3/4" drive belt so went ahead and ordered that also. Both offer free returns so no real risk.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ray54 Quote  Post ReplyReply Direct Link To This Post Posted: 1 hour 40 minutes ago at 10:57am
I did like Les and took the pully off the generator. It fit the Delco alienator with no modification.
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