Service / Repair Manual
for Allis Chalmers
Model HD21 HD21A Crawler Tractors
Complete Manual, Covers all Components
This comprehensive manual has
486 pages
For the Complete Table of Contents,
see the listing pictures
This manual shows you how to
Troubleshoot, Repair and Overhaul components
This Service Manual is a New Print of the
Original Equipment Manufacturers (OEM) Manual
Orders placed before Noon Central Time
generally get shipped the same day!
Our Manuals Help You Keep Things Working
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