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F600 Booster Upgrade
F600 (and F500) trucks of the 1960s and 1970s had a couple original brake booster options, neither of which has proven to be reliable. This system I offer is a bolt on Super Duty booster setup that has an 11" dual diaphragm vacuum booster and either a 1 3/8" bore master or a 1 1/2" bore master. Applications with a lever assembly inside the firewall (pictured below) should use a 1 3/8" bore master as this lever multiplies movement to increase fluid volume / decrease fluid pressure. Applications with a direct connection to the pedal should use a 1 1/2" bore master. This maintains appropriate fluid volume and pressure to the large drums.
F600 Lever Connection Pictured Below
Note how the lever works- movement to the booster increases, pressure decreases (1975 F600 pictured)
F600 Direct Pedal Connection Pictured Below
1972 F600 pictured
Original Systems for Reference
These trucks either had a slave cylinder on the firewall and booster under the cab, or a booster mounted directly on the firewall. 1972 F600 is first picture, 1975 F600 is second.
Please double check these dimensions before ordering.
SD Booster Installed
Pics coming soon
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