Scavenger pump and breather valve drive gear for pinion shaft. Drive gear drives oil pump for 1937-73. 4 spline drive gear is used to drive the scavenger pump and breather valve on 45″ Side Valve models, and oil pump drive gears on XL models. Spline Gear: 4 Gear Length: .660 Gear Diameter: 1.20 Teeth: 10
HD New#:26318-37 / HD Old#:689-37B











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