Does anyone here know anything about what pump a 1973 F-750 ford with the 391 FT 5 speed with a 2 speed rear axle with air brakes would have and if parts are still available?
My pump will only put out 35 PSI at a high idle and under 30 at a normal idle. It is also making a noise it hasn't made before like it is leaking the air back out of a valve on the pump.
My pump will only put out 35 PSI at a high idle and under 30 at a normal idle. It is also making a noise it hasn't made before like it is leaking the air back out of a valve on the pump.
