HD6

Registry Insight- HD6

The Allis Chalmers HD6 is powered by a 344 Cubic Inch Diesel Engine and weighs in at over 6 Tonnes as a bare unit. Drawbar power was tested at 49.95hp and belt hp at 60.5hp. The HD6 was built at the Springfield Illinois plant from 1955- 1974.There are some records that show production continued through until 1974 prior to the Fiat-Allis takeover but serial number breakdowns are not known past 1965. Units built up to 1960 had a Buda engine from S/No 13322 an A/C developed engine was fitted featuring direct injection. Initially the Model A featured a 44 inch gauge with 4 Rollers and the Model B had a 60 inch gauge with 4 rollers, later model E variants had a 60 inch gauge but with 5 rollers and the Model G was a standard loader version. The HD6EP was a powershift equipped unit.

The photo below has been provided by Warren Lucas.

The Serial number for these units is located on the rear of the steering clutch housing (upper right) or on the Instrument panel. HD-6 Serial Number ranges and build years are as follows;
1955-    101-1146
1956-    1147-6465
1957-    6466-7947
1958-    7948-10053
1959-    10054-12505
1960-    12506-13776
1961-    13777-14897
1962-    14898-16041
1963-    16042-17104
1964-    17105-18188
1965-    18189-?
1966-     ?
1967-     ?
1968-     ?
1969-     ?
1970-     ?
1971-     ?
1972-     ?
1973-     ?
1974-     ?-27271
There are some records that show production continued through until 1974 prior to the Fiat-Allis takeover. 25271
Below is a list of the currently known machines here in Australia, if you own a HD-6 please get in contact with us by emailing direct at aussieallischalmers@outlook.com and completing a copy of our registration form here.

MODEL YEAR SERIAL No  ENGINE No STATE CONDITION HD6B 1963 16321 6-20050 VIC Running HD6EP 1965 18908 6-22669 VIC Restored HD6E  1965 19351 6-23546 VIC Restored HD6EP 1966 19986   SA unrestored HD6EP 1968 21082 6-25337 VIC Restored HD6EP 1973 88Y24725 123936 (not original) VIC Restored HD6EP 1973 88Y24867 6-27027 VIC Restored HD6       WA