Cleveland 2" Impact Piston Industrial Vibrator for Hopper Trailers The Cleveland 2" Impact Piston Vibrator is designed to make unloading faster, smoother, and more efficient on hopper trailers. Its high-impact piston action helps break loose stuck material, reduces bridging, and minimizes product buildup on trailer walls—giving operators a more consistent and reliable unload. This vibrator can be mounted on the trap door frame or the dual knock rail using a compatible bracket (sold separately). Available Options Standard Model – Traditional design that requires lubricated air for proper operation and longevity. Ideal for trailers using oil-lubricated air systems. Coated Model – Features an internal coating baked onto the casting. This upgraded version eliminates the need for a lubrication system, making it suitable for systems that run non-lubricated air. If you already have an Oiler System on your trailer, you can still use the coated option, this will not hurt or damage the coating or Vibrator. Specs 2" piston 3/8" port 1200 VMR 4500 VPM Slotted bolt hole centers: 6-5/8" – 7-1/2" Port protector installed Part #021-300006 Bracket info: Available separately to fit trap door frame or knock rail installations. Knock Rail bracket - 577-34904-Click Here Trap frame bracket -577-45926-Click Here
