HD11 track dimensions

here is some info I found on the net and saved on my computer

Machine Model	New		Percent Worn Chart
	New		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

Does anyone know what the rail height was new?

I will try to copy that page from my references on the 7G as to rollers, idler, etc. may be a few days.

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

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!

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.

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

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!!

I am only hoping!!

The D6C track are 8" pitch and not fitt on HD11

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?

	This site is not affiliated with AGCO Inc., Duluth GA., Allis-Chalmers Co., Milwaukee, WI., or any surviving or related corporate entity. All trademarks remain the property of their respective owners. All information presented herein should be considered the result of an un-moderated public forum with no responsibility for its accuracy or usability assumed by the users and sponsors of this site or any corporate entity.
	The Forum	Parts and Services	Unofficial Allis Store	Tractor Shows	Serial Numbers	History