HD11B

 

I also remebered that the earliest 11s had trouble with the intermideate pinon caps,visible through the sprocket spokes appox 6'' dia. The early ones used 1/2'' fine thread bolts which would work loose and strip out, ultimately leading to bearing failure and broken cases. Within several years they upgraded to 5/8'' fine thread bolts which aleveiated the problem. It shoud be pretty easy to see the cap if the sprocket guard cover is off. If the bolts have a 3/4'' hex head then there 1/2'' if it has 15/16'' head then there 5/8'' fine thread. Check the pinion cap and case for welding or other abuse. Oil leaking out of the bottom of the pionon cap through the shim pack would be another indication of a loose  cap.This problem was more common in logging and construction tractors than farm tractors. We also did our own maching to upgrade to 5/8'' bolts in some cases (you don't want to try that at home). Anyway this is real simple visual inspection you should check out. Great tractors! if there was an ugly this could be one off them

 You could check with CRAWLER HEAVEN 315-597-6899

I had been looking at a 11B in Central Missouri, would need some work so I started pricing and looking for pieces, really high dollar when you get into track work.

Tracks on series B 11s are not exclusive to those tractors. All 11s with hydraulicly actuated steer clutches have same chains, truck wheels, and carrier rollers. Earlier spoked idlers will interchange with series B solids, as will spoked sprockets but inner final drive seal is different for solid sprocket hubs. Series B track frames are heavier with webbing across diagonal brace, but still interchangeable with earlier 11s. HD9 and all dry steer 11s have smaller diameter truck wheels, slightly smaller diameter chain pins and bushings, but chains are the same width.
Mactractor

These chaine links are for HD7 GB,HD9,HD11,250HN-HW-HLS-HTW-HS-HSS-HPL-G

hd 7g for sale with ripper.power shift.real good u/c 3800 for all r sell ripper separate details 417-718-0766 needs engine repair Lebanon mo

i am in need of a complete rail link part numbers 078701 & 078702 along with pins and bushings does anyone know where i could find these?

does anyone know of a site or list of Allis Chalmers HD dozers that use the rails 078701/078702 for I am in hope of finding a link to repair my track. a list would help narrow my search of salvage yards

crawford farms wrote: does anyone know of a site or list of Allis Chalmers HD dozers that use the rails 078701/078702 for I am in hope of finding a link to repair my track. a list would help narrow my search of salvage yards

Allis rails have been Unobtanium for a few decades now, my own 7G was 7" pitch where I got lucky enough to find decent rails on a junker I bought for parts.  Are no new in the US anymore, be lucky to find ANY in salvage yard as these were a defined need for at least twenty years and dry pin rails generally do not make 3000 service hours before shot.  Also IH/Dresser/Dressta older loaders of the 175 series used them a few years but they were readily swapped to a different pitch and sprocket segments.

Edited by DMiller - 09 Sep 2021 at 5:49pm

Major issue with Dry Pin Rails is the Pin to Bushing wear, Pins and Bushings also Unobtanium materials so a rail that Appears fine for roller contact wear yet may be 110% worn on P&Bs or rails that have been welded up have no P&Bs to reassemble.  Lost cause, as these components are Hardened alloy steel, cannot simply use pipe and steel rod to replace them.

I have read, it is to much trouble to put seals and oil in the new style tracks so no turning of pins and bushing now days. So less and less places have the equipment to do such work. 

Edited by Codger - 11 Sep 2021 at 7:08pm