Truck Mounted Grinders

In 1982, we built our first Truck Mounted grinder. The Mighty Giant truck mounted grinders have evolved over the years since the first one was built. As always, these units are designed for heavy duty commercial use and are built with the customer in mind. We mount the grinder right on the customer’s truck chassis. The tub tilts hydraulically (something we’ve been doing for over 50 years) for easy access to the hammers and screens. A multi-function remote control system is standard on the Model 2600 and Model 3600 grinders. Screens are available in a wide range of sizes, with custom configurations available because we fabricate our own screens. The Model 3600 and Model 5600 units are equipped with a Caterpillar engine. These engines are covered with Caterpillar’s 5 year /5000-hour Extended Service Coverage. The 14” discharge auger under the mill allows trouble-free grinding with less mess under the machine.


  • Engine: Model 3600/Model 5600 – Choice of Caterpillar C15 or Caterpillar C18
  • Suspension: Truck suspension provided by customer (must meet specifications needed for proper mounting)
  • Clutch: Model 3600/Model 5600 – Fluid Coupling
  • Size of mill cylinder: Model 2600 – 26” x 48”, Model 3600/Model 5600 – 26” x 48” or 28” x 50” or 28” x 56”
  • Mill shaft diameter: 5” or 5 ½”
  • Mill bearing size: 3 15/16” pillow block bearings
  • Number of hammers: Varies with mill size and specifications
  • Hammer Size: 1/2″ thick
  • Hammer Swing: 360 Degrees
  • Number of hammers: Varies with mill size and specifications
  • Hammer Size: 3/8” or 1/2”
  • Hammer Swing: 360 Degrees
  • Number of mill pins: 6
  • Mill pin size: 1 ¼” diameter
  • Mill disk thickness: 3/8” or 1/2”
  • Mill base: Constructed of rectangular tube with 3/8” plate auger trough sides and formed 10 ga. auger trough
  • Tub floor and walls: 12 ga.
  • Tub drive: Hydraulic motor with Heavy Duty Chain
  • Number of tub rollers: 8
  • Elevator size: 24” wide
  • Elevator drive: Hydraulic motor with chain drive to rubber lagged pulley on top end of elevator
  • Discharge auger: 14” diameter
  • Screen size: Various sizes – Round hole or Slot style


  • Tub opens hydraulically for servicing and changing the screens.
  • Tub hydraulic system uses a variable displacement hydrastat pump with electronic speed control for forward and reverse. Tub is chain driven.
  • Trouble free high capacity 14” discharge auger
  • Elevators drive from the top with a rubber lagged pulley.
  • Elevators hydraulically fold and unfold, hydraulically raise and lower, and hydraulically swing side to side to make a wider pile or to fill trucks.
  • Hammers have hard surfacing on all 4 edges so that they can be turned 4 times to use all 4 corners.
  • All engines have a heavy duty air filter system with precleaner and a muffler on the exhaust system. All engines have a completely enclosed engine compartment.
  • Jones Mfg. Co. purchases Caterpillar Extended Service Coverage (Warranty) for 5 Years or 5000 hours on new Caterpillar engines.
  • Hand held remote control on the Model 2600 and Model 3600 allows the operator to control tub and elevator functions from the loader tractor.

Available Options:

  • Reversing engine fan assembly: Enables operator to clean the radiator without turning the machine off.
  • 16” Discharge Auger
  • Other engine options available, but must meet specification requirements for machine and approved by Jones Manufacturing Co.