Camshaft Timing Gear
CTPA-70227038 Replacement Part to Fit:  Allis-Chalmers "For Models: (170, 175, D17, W201 ALL Gas), (W226, WD45 ALL Gas Eng. SN 45- 48556->)" Replaces: 70203923. 54 tooth  Price:  $148.92  Buyers Club Price:  $134.03