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Antique Allis Chalmers Tractor: AC K Crawler

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This picture is a 1933 model. The K Crawler replaced the Model 35 Crawler and came with a spark-ignition engine. This tractor was also known as the "Special K".

AC K Crawler Tractor

Do you have any comments or questions about this tractor? Ever use one? Know anyone who owned one? If so, please join in on the discussion below. Use the form for entering your comments.

Comments on this Tractor

Gordon Martin wrote on Wednesday, October 12, 2011 (PDT):
  • Drove a loaner KO in 1945 while we were waiting for a new HD-7. Old model with two stacks no mufflers. Used to shoot blue flame about 8 all night and every few minutes a batch of sparks flew out. Any KO s still running
    Curt Friday wrote on Thursday, January 06, 2011 (PST):
  • 34 Monarch with steering wheel. Work in progress. 11,600# machine in pretty bad shape.... I ll have it running in a year or so.
    Dennis Gyles wrote on Saturday, September 25, 2010 (PDT):
  • I have a HD5G/TS5 and I am i need of a transmission or a good case. Thanks Dennis
    floyd wrote on Tuesday, August 10, 2010 (PDT):
  • i am led to believe that i have a 1934-35ish crawler about half of it the frame gear box and track i plane to in stall a ford six cyl. motor and use it to move snow and maintain my driveway it would be nice to have a repair manual and i would like to try and find the sheet metal to make it look original any imfo. would help thank you.
    Cindy Geisinger wrote on Tuesday, March 16, 2010 (PDT):
  • I have a 1932 AC model K crawler, with hydraulic Baker Blade attached. It did run before but has been sitting for 20 years inside my barn. I used it to level the spot where my trailer sits now and then parked it in barn. I need to sell it because I am moving all equipment out of barn to put in a concrete floor. It has gear controls and no steering wheel. I loved it and Im a girl. Offer me a price... Hate to part with it cause dad gave it to me. Call me at 816-258-2452
    Joe k wrote on Wednesday, August 12, 2009 (PDT):
  • JD 40 make offer. Runs great.
    Joel Mierhoff wrote on Friday, January 30, 2009 (PST):
  • Just wondering what the value of a newly restored in great running condition, 1952 T 340 international harvester caterpiller with a 4 in 1 drott bucket 3 tooth drott ripper 4 cyl unleaded fuel and runs on a track. I have an extra motor and parts. Would like to sell...
    Joel Mierhoff wrote on Friday, January 30, 2009 (PST):
  • Just wondering what the value of a newly restored in great running condition, 1952 T 340 international harvester caterpiller with a 4 in 1 drott bucket 3 tooth drott ripper 4 cyl unleaded fuel and runs on a track. I have an extra motor and parts. Would like to sell...
    David HInes wrote on Sunday, December 14, 2008 (PST):
  • My HDE Hydrulic filter is on the side of the hydro. tank up front with the pump. I need a final drive shaft for the drive sprocket on my HDE does anyone know where i can get one
    David HInes wrote on Sunday, December 14, 2008 (PST):
  • My HDE Hydrulic filter is on the side of the hydro. tank up front with the pump. I need a final drive shaft for the drive sprocket on my HDE does anyone know where i can get one
    Rick wrote on Wednesday, December 26, 2007 (PST):
  • I have recently purchased an HD5 with an after market dozer. The motor is in need of repair and also needs steering clutch repairs. I am looking for parts or would consider selling unit.
    Harold Dalton wrote on Thursday, December 20, 2007 (PST):
  • have a 1957 HD3 new motor owner s and service manuel tractor is in better than average shape changed hobbys would like to sell
    Duane Eleson wrote on Saturday, December 01, 2007 (PST):
  • I have a Model K Allis crawler . No blade but hydraulics added to pull farm equipment. Not sure of the year or serial number , but if you contact me i can find out. Will sell if I can receive reasonable offer.
    Tim ruble wrote on Thursday, October 18, 2007 (PDT):
  • I have a 1959 HD-6 Allis-Chalmers crawler. I would like to know where the hydraulic fluid filter is located.
    Rick Bossi wrote on Sunday, July 01, 2007 (PDT):
  • I own an Allis Chalmers model M. not sure of the year.runs great,does need a intake/exhaust system. also an air cleaner it running this year.possiblly want to sell.bought a kobota tractor.Or if someone has the parts i need maybe intrested in them.
    arnold bacon wrote on Saturday, June 24, 2006 (PDT):
  • i just pick ed up one of these and i would like some imformation about it.. possibly a parts manual thank you arnold E-Mail.. baconcounty1 at
    Whit wrote on Monday, May 29, 2006 (PDT):
  • We have an Allis Chalmers 35 crawler with grader out on the farm, hasn't moved in about 30 years. Kinfolk are selling the property, said we could sell any old machinery, this in a neat piece, but rather rusty... It's in south central Texas, sorry no delivery. Pics here...
    John Wyant wrote on Thursday, February 23, 2006 (PST):
  • I have a Allis Crawler with ser# WKO4368 and am confused with the available ser # lists. is it possible that the 6000 numbers were for Orchard K's? as mine is defenately not an orchard and has a cab and the ser# is not in the 6000 range.
    STEVE CECIL wrote on Tuesday, January 10, 2006 (PST):
    charles sanderson wrote on Saturday, November 26, 2005 (PST):
  • i would like to buy a allis chalmers crawler tractor model k with a steering wheel and a baker blade. any condition.if you know of one or have one available, please write, thanks, charlie
    charles sanderson wrote on Saturday, November 26, 2005 (PST):
  • i would like to buy a allis chalmers crawler tractor model k with a steering wheel and a baker blade. any condition.if you know of one or have one available, please write, thanks, charlie
    Gary Lay wrote on Wednesday, October 19, 2005 (PDT):
  • I am in need of the brackets for the track idler on my 1938 Model M Crawler. Any ideas or suggestions?
    Chuck L. wrote on Sunday, August 21, 2005 (PDT):
  • If yours is only moderately worn (Like mine was), I think you can reverse it and prolong its life, because most of the wear is on the 'engage' side. I do have an engine core laying out behind the shop which may have a usable throw-out bearing if you are in a real bind and can't find a better one or reverse and use yours.
    Terrence Faul wrote on Wednesday, May 25, 2005 (PDT):
  • Looking for a parts source for a 42' Allis Chalmers Model "M" crawler. Mine runs but I need a new throughout bearing. Any place I can purchase one?
    Andy wrote on Wednesday, March 09, 2005 (PST):
  • What's it worth? Helping friend determine value of his Allis Chalmers "WKO" ag crawler. electric start, starts on gas, switch to diesel. Would appreciate any comments, referrals, located in Central California. Thanks!
    ken rowe wrote on Tuesday, February 15, 2005 (PST):
    Ox wrote on Monday, February 14, 2005 (PST):
  • I have a K crawler identical to the one in the photo. In fact, I live south of where it was taken about an hour. I'm looking for a service manual and a good exhaust manifold if anyone can help me. Thanks!
    gene schulte wrote on Monday, December 13, 2004 (PST):
  • I have 2 HD7 Dozers, looking for track & suspension parts Would consider selling 1 or both.Both are running but need TLC.
    Don wrote on Sunday, November 14, 2004 (PST):
  • I have a monarch 35 that my grandfather bought new in 1931 #K-1782 I am trying to get in shape. I am in need of one head gasket. Do you know where I might find one. I am located in california.
    KEN wrote on Tuesday, July 20, 2004 (PDT):
    Steven wiley wrote on Monday, July 12, 2004 (PDT):
  • I, am looking for parts for my 1930 AC M Tracked Tractor. I hope someone can help.
    JT wrote on Thursday, June 17, 2004 (PDT):
  • if anyone has a set of crawler tracks for a 1950 allis chalmers hd5 please send me an email thanks
    JD Cain wrote on Friday, May 28, 2004 (PDT):
  • We have an alligator crawler that is in good condition and runs good. It will be selling June 5th. Also at sale; antique tractors, antique garden tractors, antique walkbehinds, implements, antique cars, willy's jeep, tools, engines, and much more! (316)322-5384 or (316)322-3976. You can view photos at
    Don Yelverton wrote on Monday, May 17, 2004 (PDT):
  • I doing a little research and would like to know the wheelbase of the AC K Crawler and when some of the changes or improvements occurred over time. I haven't been able to find a site on the net with htis type of information. Thanks in advance for your assistance.
    Peter M. Ratcliffe. wrote on Thursday, April 29, 2004 (PDT):
  • UK farmer. I have nice 1949 Allis-Chalmers HD 5B crawler with GM type 71 blown-scavenge two-stroke Diesel. Not much info Stateside. Possibly they were nt popular-? Great tractors over here. Caterpillar eventually outperformed. Member UK Chapter ACMOC. Have collection great machines
    nathan nipula wrote on Friday, April 02, 2004 (PST):
  • Looking for steering clutch metels for a 1939/40 allis chalmers model m crawler serial # in the 12000s .
    David wrote on Monday, February 02, 2004 (PST):
  • I have two Allis-Chalmers Model K tractors with steering wheels, one wide track, one narrow track, complete but not running, manuals for one, belonged to my father. What are the values of these tractors, am interested in selling.
    Brenda Fanning wrote on Tuesday, December 30, 2003 (PST):
  • I need any imformation on the HD5 crawler tractor. It is a 2 cylinder General motors diesel.I need a parts manual.
    Randy wrote on Monday, December 29, 2003 (PST):
  • I have a 1955 AC HD 14C dozer and I am looking for a cable control.
    mike forgnone wrote on Monday, November 17, 2003 (PST):
  • looking for a baker blade and/or a winch to fit a wm allis crawler. e-mail us with your list of parts for a m or wm allis crawler. we have restore 2 and have quite a supply of parts left over that we are willing to get rid of
    steven wrote on Saturday, November 08, 2003 (PST):
  • in need of ko engine parts fuel pump assy drive shaft and gears and cam gear 1936 ko ser #6040 i understand a k has the same gears but not the shaft thanks
    Patrick wrote on Thursday, November 06, 2003 (PST):
  • I am restoring a AC "WM" Crawler wide track. It has the same motor as the "M" crawler or "U" tractor. I need a piston, ring set, 2 exhaust valves, engine gaskets, manifold gaskets, spark plugs and varius other parts including decals. Can anyone help me? The crawler is a "WM", Ser. 4622. Iam told it is 1937 vintage.
    Morris Wilkins wrote on Saturday, June 07, 2003 (PDT):
  • Need Steering clutches for HD14 dozer
    Darrel wrote on Thursday, February 20, 2003 (PST):
  • I am working on AC K Crawler Monarch 35-1931 model-Serial No K-1483. I Need intake valves and starter, so far, maybe more parts later. Does anyone have either of these parts? Thanks
    Howard Wade wrote on Friday, January 31, 2003 (PST):
    Jim Hayes wrote on Friday, January 24, 2003 (PST):
  • I am looking for a HD-7 with a cable blade.Does anyone knok of one?
    DARRYL KRAUSE wrote on Sunday, December 29, 2002 (PST):
    echo wrote on Saturday, August 31, 2002 (PDT):
  • I have a 1960 AC HD16 DC with a 16000 series 6 cylinder diesel engine. I would like to see some pictures of HD16's that other people might have.
    FLASH2 at wrote on Tuesday, June 25, 2002 (PDT):
  • I have (1)allis chalmers H-3 dozer w/6way blade and spare parts,2 transmission,REAR ends an misc. dozer needs rear drive bearing, haveparts.working on it now,trying to find drive pin on tracts, book says pin 5/16 longerthan others
    Jim Desher wrote on Thursday, March 28, 2002 (PST):
  • I have access to an AC-HD5 . it has a detroit engine, on the side plate it reads (tractomotive deerfield Ill. )On the other side plate it reads Tractos.It has been sitting for about 4 years outside it is surface rust and needs painting and some tender loving care. Some new hoses.Seems to be all there. Any one interested make an offer. jimydesh at
    Jeff wrote on Tuesday, March 26, 2002 (PST):
  • Can someone tell me the weight and hp of a AC hd 7
    randy beasley wrote on Saturday, March 16, 2002 (PST):
  • i need ring and pinion grars for 1937 k w would consider complete tractor or parts tractor in west cent il or st louis mo area thanks
    kevin wrote on Sunday, February 24, 2002 (PST):
  • I'm acquiring an M that has been under cover for years. Does someone specialize in parts for these tractors? Any value to one that isn't stuck and appears real straight? We haven't tried starting it yet.
    Diane Stasko wrote on Tuesday, February 05, 2002 (PST):
  • We are working on an Allis K with a blade. Got any stories?1-715-644-2020
    Jeremy S wrote on Wednesday, November 07, 2001 (PST):
  • I recently purchased 2 AC HD21 dozers. One has the allis inline turbo 6cyl and the other now has a detroit V8. i am interested in any info/ mech, tear down, or spec. One needs turning clutch work, the other needs poss. cyl sleeve?? Any info and or pictures would be greatly appreciated!!
    ak wrote on Sunday, August 26, 2001 (PDT):
  • dose any one have ac k crawler for sale between 200 and 2000
    Cris L. wrote on Sunday, August 19, 2001 (PDT):
  • I saw a AC crawler yesterday....the model tag said "TS-6" Does anyone have any idea how old it is and if parts are still available for it? I wouldl like a small crawler to work on during the winter. Thanks, Cris L.
    Rad Man wrote on Tuesday, August 07, 2001 (PDT):
  • We have a 1931 k-crawler #k-964 steering wheel, 12v start, hyd blade exl under carriage turn key ready could be the oldest special k around. any offers $$$!!!!
    robert dendinger wrote on Tuesday, April 24, 2001 (PDT):
  • hey you guys im shocked to see any body who knows what a allischalmers is we have three ko crawlers on are place and they function and seven model ms and they also work plus 13 other tractors especially tiny wheel tractors i can be reached atdendingero at
    Bill Fickel wrote on Wednesday, March 28, 2001 (PST):
  • I have a Model M bulldozer it good running condition many parts on this machine are like brand new .This machine is in working condition.And the whole machine except for the fuel tank and steering clutches are original. Its FOR SALE
    Helen Jarvis wrote on Wednesday, November 29, 2000 (PST):
  • I own a AC model M crawler either a '46 or '47 and am looking for a water pump for it. I had the radiator rebuilt and someone took off with the water pump to rebuild it but haven't seen it in 3 yrs. It used to run great and was used to farm hay in Woodside, CA by the King's family from Summit Springs now called King's Mountain.
    dave wrote on Saturday, November 25, 2000 (PST):
  • I just came across an AC K model crawler, it has a baker blade with overhead hydraulics, the tractor ios fairly complete but has been sitting for a long time. The trtacks and pads do not look very worn Does anyone have any interest in it? Or what is the value as a parts machine? It is located near Phila. PA Dave djnewman at
    greg jones wrote on Monday, October 23, 2000 (PDT):
  • I need parts for HD7, Especially stabilizer spring and drive parts.
    Harley H wrote on Sunday, October 22, 2000 (PDT):
  • We have a Model K, Might consider selling it. It has a dozer blade. Engine is very good but the right steering clutch has a problem.
    k.c hahn wrote on Saturday, July 29, 2000 (PDT):
  • cylinder sleeves to fit a-c model a tractor k l crawler e60-e563 power unites 51/4 bore anybody need any made?
    Antique Tom wrote on Sunday, June 18, 2000 (PDT):
  • Need information on HD-3 Allis Chalmers,six-way hydraulic dozer.Any help appreciated. Thanks
    Mike Darby wrote on Thursday, March 02, 2000 (PST):
  • I own a model M crawler that is a gas 4 cylinder 6 volt magneto that I'm rebuilding and using. It has been converted into a dozer and does apretty good job. I sure wish I knew where I could get parts or an old salvage unit. This thing is a pretty good machine.The serial number is M-3489, so if anyone knows anything about this or a parts tractor let me know. What year is this thing . Iwas told it was a 1942 thru 49?
    chuck benson wrote on Monday, January 17, 2000 (PST):
  • looking for imformation on my old crawler it has a flat head 4 cyl gas eng 6 volt elec. and atc on the grill is it a allis chalmers? I think it has a wisconson eng. is this possible? any help would be great thanks.
    S.Campbell wrote on Friday, January 14, 2000 (PST):
  • My Father needs some information on a Allis Chalmers HD4 any help would be greatly appreciated. Thank you
    john frankenstein wrote on Friday, December 17, 1999 (PST):
  • I would like information on HD5 or HD6 crawler highlifts. My dad owned one and I would like to know where I could receive more info on them. Thanks
    Tom Armstrong wrote on Thursday, December 09, 1999 (PST):
  • In this area, the AC Model M pretty much replaced the horse for farming the hills here for grain and flax. One family up the Canyon had a Model K. I remember they still used it back in the "50's and '60's. They ran it in the same field as a 7U D-4. They worked one behind the either all day long, both pulling 4 bottom plows. I ran an M in the same field as a 5U D-2, the M would keep right up with the D-2, both pulling 6'9" discs. The M would outrun the D-2 if you tied the throttle down. This was amazing performance for tractors engineered in the early thirties.
    dale wrote on Wednesday, August 18, 1999 (PDT):
  • looking for any info on aliss chalmers dozer H-3 especialy cost of final drives + bushings +rollers any info will be appreaciated thanks firebird
    Persian orange paint in my veins wrote on Sunday, August 08, 1999 (PDT):
  • '34 models were the last ones to use a steering wheel. I have a '35 model. It starts by crank only. It still sets in the same barn where it was delivered new in 1935 by a dealer in Dodge City, Ks.
    lil orphan allis wrote on Thursday, July 15, 1999 (PDT):
  • you have a very rare crawler.later models had levers.
    JIM BRAND wrote on Wednesday, April 21, 1999 (PDT):
  • I bought one from my dads estate. Its a 1934 with a steering wheel. It runs good and is 12v electric start. Did all model k's have steering wheels? How rare are these? and what was the production run on this model?

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