Sorry but the 1936 1/2 tons high cab & low cab all had hydraulic brakes. The only 36 that did not have hydraulics was the 1.5 ton trucks for the first 2-3 months of production (models R). If you need any information on 1934 or 35 just ask me, there isn't much I don't know about these years both 1/2 & 1.5 tons.