1982 - 2008 Kenworth W900B And W900L Front Leaf Spring - 4 Leaves - 59-440

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Kenworth front leaf spring part number 59-440.

  • Number of Leaves - 4 (PD/4/SHOCK EYE)
  • Leaf Spring Width - 4"
  • A - Leaf Spring Length: 27-1/4"
  • B - Leaf Spring Length: 27-1/4"
  • C - Leaf Spring Arch: 5-7/8"
  • D - Leaf Spring Pack Thickness: 3-11/16"
  • Leaf Spring Capacity: 5,900 lbs.
  • Leaf Spring OEM Number: K223-1273-30
  • Leaf Spring Eye Bushings: Front TB-68 / Rear TB-68
  • Leaf Spring Material: Pad 1/.499, 4/.625 Full Taper, Shock Eye 1/.499 
  • Location - Front
  • Shock Eye Facing Opposite Of Wrapper


Leaf spring 59-440 is the front leaf spring on 1982 - 2008 Kenworth W900B and W900L heavy duty trucks. The spring is 4" wide and is a 4 leaf full taper spring with 1 pad and a shock eye facing opposite of wrapper. The capacity is 5,900 lbs. The OEM part number is K223-1273-30.

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