... to around 27psi when you rev it up without a load. This overflow valve is the new style with the ball ... : Cast Iron,Steel3. Features:1).Oil Thumb Screw2).Trucks Bolt3).Truck Thread4).Material: Steel5) Ref. TTC NO:19.0158 4. ... Excavators, Loaders, Compactors, Concrete Mixers, Concrete Truck, Motor Graders, Pavers, Pile Driver, Road Roller, Dump Truck, Forklift, Lathe, Milling Machine, Knitting Machinery ...