A-AC-O-HD21AAllis Chalmers Operator Manual
(Diesel S/N 11001-12000)
A-AC-S-HD21Allis Chalmers Service Manual
(S/N <9001 w/ HDS844 Engine)
A-FF141Filter, Fuel, Cartridge (QTY 12)
A-LF500JFilter, Lube, By-Pass Cartridge (QTY 1)
A-LF500Filter, Lube, By-Pass Cartridge (QTY 4)
A-LF509NJFilter, Lube, Full-Flow Cartridge (QTY 1)
A-LF509NFilter, Lube, Full-Flow Cartridge (QTY 12)
A-LF682Filter, Lube, Spin-On (QTY 12)