Assuming his '50 1.5 ton truck axle has the same rear axle as a '50 GMC 300 series with a GM corporate H-110 axle,

1. Remove cap screws and lock washers attaching hub cap to hub, then remove cap and gasket.
2. Thread adapter L-1436-8 into tapped hole in axle shaft and attach J-2654 slide hammer to adapter. Pull axle shaft using slide hammer (fig. 26).
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'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.