SX4 Four-Axle Side Dump

SmithCo’s SX4 series works in states that allow extended weights and is usually used in a line-haul application. The SX4-4936 is the more popular length. Some states allow extended weight but cap the number of axles you can use, sometimes a shorter trailer with more axles will fit your application better. Because the load dumps to the side, axle locations are not restricted like other dump trailers. Lift axles and steerable axles are common options on this series.

  • Stock Pile or Windrow
  • Watertight, No Leaks
  • Dump Off of Either Side
  • Low Load Height
  • AR400 Steel Tub, One Piece Floor
  • 80/100 KSI Steel Frames
  • Self-Aligning, Spherical Bearing Hinges
  • External Column Tub Supports
  • No Center Tub Divider
  • Shot Blast Paint Prep
  • Polyurethane Paint

SX4 Spec Sheet


Frame Length:  45’ 5”
Tub Length:  36′
Width: 102″ 
Height: 8’ 2” @ Tub Side, 9’ 4” @ Center 
Tub Capacity: Round Bottom Tub, 24 Cubic Yard, Waterfull
Round Bottom Tub, 32 Cubic Yard, Full Capacity
Tub Construction: 1/4” Thick, AR400 Steel (or equivalent)
3/16” Thick, AR400 Steel (or equivalent) is Optional 
Frame Construction:  80/100 KSI, Fabricated Steel I-Beam
Landing Gear: Two Speed, Non-Load Bearing
Bumper:  Push Bar Type, Bolt-On
Cylinders:  3000 PSI, 5: bore
Suspension: Air Ride Suspension Standard
Spring Ride Available
Axles:  (4) 25,000# capacity
Hubs:  10 Hole, Hub Piloted
ABS:  2S1M Anti-Lock Brake System
Drums:  Outboard Mount, Cast Steel
Wheels:  Steel Disc, 8.25 x 22.5 (16)
Tires:  11 R 22.5 G Radial Tires (16)
Brakes:  16 1/2” x 7”
Fenders:  Front & Rear, 1/4” Synthetic, 7 Degree Slope
Lights:  12 Volt LED ICC w/Sealed Harness
Mud Flap:  (2) Polyline Anti-Spray Splash Guard w/SmithCo name
Paint:  White Tub; Gray Frame (Special colors are available upon request)
Minimum Tractor Hydraulic Requirements:  25-30 GPM, 2,200-2,400 PSI, 10 Gallon Reservoir

Don’t see EXACTLY what you want?


 We build more custom designed trailers than any other manufacturer, and we’d love to talk to you about building the perfect solution for you.  

Call us at 800-779-8099

Share This