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HD11 track dimensions

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James Coons View Drop Down
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    Posted: 03 Jan 2016 at 10:35pm
Are there any resources out there still that give you the dimensions of the undercarriage components (chain, pins, rollers, idler etc.) for AC crawlers?  I'm looking specifically for the dimensions on HD11 chain but it would be great to have others for future reference.
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CAL(KS) View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote CAL(KS) Quote  Post ReplyReply Direct Link To This Post Posted: 04 Jan 2016 at 4:54am
here is some info I found on the net and saved on my computer

Machine Model

New

Percent Worn Chart

25%

50%

75

100%

mm

in

mm

in

mm

in

mm

in

mm

in

Allis - Chalmers

HD3, HD 4, 652, 653, 655

610

24.01

613

24.14

619

24.25

619

24.36

623

24.53

HD5, HD6, 150 H, 155

660

25.98

663

26.1

671

26.26

671

26.42

676

26.6

HD7G, 8G, HD9, HD11, EP, B250H

711

28

714.5

28.12

725

28.31

725

28.54

731

28.78

HD15, HD16, 350, HD316

800

31.5

804

31.65

814

31.84

814

32.04

821

32.32

12G, HD16D, 16B

798

31.41

802.5

31.59

813

31.79

813

32

820

32.28

HD19, HD20, HD21

915

36.01

919.5

36.2

930

36.39

930

36.6

937

36.89

HD21P, HD21B

915

36.01

919.5

36.2

931

36.39

931

36.65

938

36.92

FD30, 21C

919

36.18

924

36.37

936

36.59

936

36.85

943

37.12

FD40, 31, 41

1147

45.15

1152.5

45.37

1176

45.6

1176

46.29

1185

46.65

FD50, 41 B

1147

45.15

1152.5

45.37

1177

45.62

1177

46.34

1186

46.7



Edited by CAL(KS) - 04 Jan 2016 at 5:02am
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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DMiller View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DMiller Quote  Post ReplyReply Direct Link To This Post Posted: 04 Jan 2016 at 7:28pm
HD7G(as I own) and HD11 share a size of rail 7" pitch similar to IHC/Dresser older units and is unavailable anymore, a few here have upgraded bottom rollers and sprockets to use Cat rails with decent results.
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James Coons View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote James Coons Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jan 2016 at 10:11am
Does anyone know what the rail height was new?
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gemdozer View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gemdozer Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jan 2016 at 11:14am
The HD11 rail height when new are  4.062
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DMiller Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jan 2016 at 3:29pm
I will try to copy that page from my references on the 7G as to rollers, idler, etc. may be a few days.
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Ian Beale View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ian Beale Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jan 2016 at 4:09pm
Cal(Ks)

Why would some of those Allis specs have the same number for 50% and 75% wear?
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CAL(KS) View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote CAL(KS) Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jan 2016 at 4:19pm
interesting. i hadnt noticed.  the inch measurements change but the MM dont?  perhaps i made a copying error.

Edited by CAL(KS) - 13 Jan 2016 at 4:19pm
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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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ian Beale Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jan 2016 at 8:42pm
Cal(Ks)

Mightn't have been you

There is an inch/metric screw up in the FA 10 genuine manual I have in Fig 373 "Tilt angle in relation to tie rod length adjustment" in the tie rod mid position diagram.  The length fully extended is 3 feet 1 1/2 inches.  In the mid position it is 3 feet 3 inches.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ian Beale Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan 2016 at 2:46am
And following up from the other track post.

I have usually worked on the best defence is usually offence.  So I bit the bullet and put a tape on our FA 10 tracks.

And had several more beers.

With around 2000 hours on them 711 mm.  75% is 718 mm. 

The case hardened dozer fixed who pointed me on the replacements said ITM NOT Berco.

YMMV - I'm only reporting!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote James Coons Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan 2016 at 11:32am
Checked the serial number oh my machine its HD11EP    13621.   Am I correct in thinking that undercarriage parts from an HD11B   5315 are different?
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AC Mel View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AC Mel Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan 2016 at 12:19pm
YES, They should be different. I'll scan the other track specs and get it to your regular email when I have a couple of minutes.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AC Mel Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan 2016 at 12:58pm
Ok, this should be what everyone wants to know. This is a picture of a picture photo P1130065_zpshrmy5ziw.jpg
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Lazyts Quote  Post ReplyReply Direct Link To This Post Posted: 17 Jan 2016 at 6:18pm
New rail height for HD11EP is 4.25".  Caterpillar says to install Cat D5 rails, with cat sprocket, rollers and idlers should fit, has been discussed before on this forum.  I have looked at HD11s with cat rails installed- looks factory, and can be run with Allis sprockets as well.  Most new D5 rails now measure a healthy 4.38" or so.  Pitch is slightly shorter than HD11, but bushing is smaller, so still fits in sprocket.  At one time Cat offered D5 bottom rollers with no holes in the end collars, so you could drill your own to fit, not sure if they are still available.  (was supposed to work on 10 F/A, adapter plate needed for HD11)
Collar numbers 6T7334 and 6T7332
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Post Options Post Options   Thanks (0) Thanks(0)   Quote boyd Quote  Post ReplyReply Direct Link To This Post Posted: 04 Oct 2016 at 6:55am
I knew i didn't know anything but i didn't know how much i didn't know. Thanks a lot for all the information. A guy has to start somewhere. We have used old logging equipment and got the job done but that was before the 'modern era". I want to stay away from the machines with all the electronics definitely.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DMiller Quote  Post ReplyReply Direct Link To This Post Posted: 04 Oct 2016 at 11:49am
I just got the call from a friend that scraps Heavy Equipment, got a burned 953 with at least 70% rails and shoes, he is offering to me cheap so once I get the time he is going to hold for me.  I still have a set of 7G rails at my barn just no shoes to go with them.  One way or another my old machine will get new dance floor equipment as the old slick shoes and snaky pins/bushings are killing me when I go to use it!!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote dadsdozerhd5b Quote  Post ReplyReply Direct Link To This Post Posted: 04 Oct 2016 at 7:28pm
nice find! those 953 tracks will be sealed and lubricated also. what ever it takes to keep them running!
HD5B, HD5G, (2) FARMALL A's, CUB. DO IT RIGHT THE FIRST TIME, IGNORE THE LAUGHTER. FLANNEL IS ALWAYS IN STYLE.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DMiller Quote  Post ReplyReply Direct Link To This Post Posted: 05 Oct 2016 at 2:11pm
I am only hoping!!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tennessee Plowboy Quote  Post ReplyReply Direct Link To This Post Posted: 10 Nov 2016 at 7:08am
I'm new to this stuff. can someone say if a near new track group taken off a D6C cat will adapt to fit a HD11E. Am I reading it right the cat has 6.75 pitch.  Thanks
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gemdozer Quote  Post ReplyReply Direct Link To This Post Posted: 10 Nov 2016 at 1:49pm
The D6C track are 8" pitch and not fitt on HD11
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ray54 Quote  Post ReplyReply Direct Link To This Post Posted: 10 Nov 2016 at 4:54pm
Originally posted by Tennessee Plowboy Tennessee Plowboy wrote:

I'm new to this stuff. can someone say if a near new track group taken off a D6C cat will adapt to fit a HD11E. Am I reading it right the cat has 6.75 pitch.  Thanks

That is the pitch for every D6 up until the D6c. I do not know if that is available anymore or not. Cat had sprockets to us 6.91 inch pitch chain for the D5 for the older D6.  I have one that has that conversion ,includes bolt on sprocket segments.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote crawford farms Quote  Post ReplyReply Direct Link To This Post Posted: 08 Sep 2021 at 8:10am
i am looking for rail links for a HD11EC the casting numbers i am looking for is 078701 and 078702 can someone point me in the right direction please?
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