i wonder too? do u have a five roller frame on the 4d? would the frames be to long if the 4 roller frame tractor have a blade on it? here's ht4 tracks with oil pan i got for sale. i wonder if anyone replaced u series 4 roller frames with ht4 5 roller frames. is it even possible?
shoe bolt head is 3/4" , i can't get to bolt diameter.
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Mike,
My D4D has a 5 roller bottom with rock (dirt) guards. If your pad bolts have a 3/4" hex, I would assume they are 1/2". Apparently, pad bolt size is one of the many changes Cat made to the D4 chains over the years. I'm hoping that some of the experts on this board can outline the other differences in these undercarriages.
Scott
Not the same. Although the track pitch is the same the D4 bushings are 2.0" diameter, the D4D's are 2.125". Sprocket on the D4 is 27 tooth, the D4D is 29 tooth. Different sprocket diameter. Rollers are the same, front idlers will interchange but use different bearing blocks.
ag-mike,
D4 (not D4D) and HT4 is the same stuff. 5-roller frame on a D4 comes from loaders.
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