Details
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642 pages - Allis Chalmers HD-21 Diesel Crawler Service Manual (SVC)
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642 pages - Allis Chalmers HD-21P Crawler Diesel (S/N 12000-16000) Service Manual (SVC)
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642 pages - Allis Chalmers HD-21A Crawler(0-9001)w/HDS844 Engine, (9001-11001) w/HDT844 Engine, (11
001-16000) w/21000 Engine Service Manual (SVC)
Fits the following makes and models:
Allis-Chalmers CRAWLER: HD21 (Diesel)
Allis-Chalmers CRAWLER: HD21A (S/N <9001 w/ HDS844 Engine)
Allis-Chalmers CRAWLER: HD21P (Diesel, S/N 12000- 16000)