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7G-Tony 
Bronze Level
Joined: 14 Feb 2024
Location: Gothenburg, SWE
Points: 7
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 Topic: 7G Series B
Posted: 14 Feb 2024 at 4:39am |
Dear members,
Hi there, writes Tony, a Swede near Gothenburg in Sweden. Thanks for giving me this opportunity as a foreigner, much appreciated! I am a former professional engine -, car - and workshop mechanic for more than 45 years. A couple of years ago I stumbled over this A C 7G Series B crawler loader from about 1975-1978. I am recovering from a severe heart attack in another place so I am not able to check it out by myself at this moment, so please help me out with the following:
I need to know the thread for the screws for the removal tool on the crankshaft pulley for the 3500 II so I can be prepaired with a tap for cleaning them and screws when the snow have melted. Are they UNC or UNF..? If at hand, please let me also know how deep they go.  Kindest regards & thanks for the time Tony
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Eric B
Orange Level
Joined: 09 Feb 2012
Location: British Columbi
Points: 888
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Posted: 15 Feb 2024 at 5:44pm |
Welcome to the forum... sometimes it takes a while before you get the input you need. I don't have a machine like yours. When the HD7G's were new back in the 60's I got a new brochure of one of these - in Swedish of all things - Heja Sverige!  Take care - Eric
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Currently- WD,WC,3WF's,2 D14's B. Previously- I 600,TL745,200,FL9,FR12,H3,816 LBH. Earth has no sorrow that Heaven cannot heal!
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7G-Tony
Bronze Level
Joined: 14 Feb 2024
Location: Gothenburg, SWE
Points: 7
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Posted: 16 Feb 2024 at 3:34am |
Eric, Many thanks for Your reply and the kind words, much appreciated!
- In Swedish?! I wish You the same, so please be careful when You are working on the machine!
Kindest regards & thanks for this contact Tony
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Braswell
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Joined: 14 Feb 2024
Location: North Carolina
Points: 16
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Posted: 27 Feb 2024 at 3:47pm |
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Hey Tony… Randy here from North Carolina.. did you get your answer on the front pully???
I have a timing question you might can answer on this same machine. Do you know the injection pump timing procedure for this machine???
Many thanks
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Les Kerf
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Joined: 08 May 2020
Location: Idaho
Points: 605
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Posted: 27 Feb 2024 at 8:01pm |
I have an old parts manual but it shows the engine as being a 3-71 Detroit Diesel so I think it is too old to do you any good.
The 3-71 has a 1" NF x 4" long bolt holding the front crankshaft pulley on if anyone cares.
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7G-Tony
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Joined: 14 Feb 2024
Location: Gothenburg, SWE
Points: 7
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Posted: 28 Feb 2024 at 11:07am |
Braswell,
Thanks a lot for Your message!
Due to my recent heart attack and the following and life threatening wrong medicine, I ask You to please let me wait to the following weekend, thanks!
I will do my best to search for the facts that You ask for in my manuals purchased through Ebay in USA. 
Kindest regards & thanks for the contact Tony
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7G-Tony
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Joined: 14 Feb 2024
Location: Gothenburg, SWE
Points: 7
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Posted: 28 Feb 2024 at 11:11am |
Les Kerf, Thanks a lot for Your message, much appreciated. My engine is the 6 cyl 7L with model number 3500 II. Thanks for the contact!
Kindest regards Tony
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CAL(KS)
Orange Level
Joined: 18 Sep 2009
Location: Chapman, KS
Points: 3734
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Posted: 28 Feb 2024 at 11:53am |
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3-71 would be for the old HD7. totally different machine from 7g/7gb loaders
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Me -C,U,UC,WC,WD45,190XT,TL-12,145T,HD6G,HD16,HD20
Dad- WD, D17D, D19D, RT100A, 7020, 7080,7580, 2-8550's, 2-S77, HD15
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7G-Tony
Bronze Level
Joined: 14 Feb 2024
Location: Gothenburg, SWE
Points: 7
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Posted: 02 Mar 2024 at 6:08am |
Braswell,
Hi again! Paste the following into Google, download the very first link and go to page 74! You can download the manual once it has open up. https//archive.org/details/ALLIS-CHALMERS_3500_MK2_Engine_Operating_Maintenace__manual_05-1975/page/n73/mode/1up
Have a nice one!
Greetings Tony
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Braswell
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Joined: 14 Feb 2024
Location: North Carolina
Points: 16
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Posted: 03 Mar 2024 at 8:18am |
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THANKYOU Tony!!!
Praying your health returns to normal…
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7G-Tony
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Joined: 14 Feb 2024
Location: Gothenburg, SWE
Points: 7
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Posted: 13 Mar 2024 at 1:00pm |
Braswell,
Hi again! Thank you very much for Your very kind message and Your sincere gratitude, MUCH appreciated after one more week of taking care of the "pump"!
I have the very same manual at hand via Ebay in USA, but I decided to search for a link for it as a complete PDF file for You.
Kindest regards & take care in the workshop Tony
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