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King Pin Kit - Mack FXL12-FXL23M / Volvo FM9 FM12 Axles Bronze-Nylon Bushings - Mack 20590487 Stemco K536M 460.542N
King Pin Kit - Mack FXL12-FXL23M / Volvo FM9 FM12 Axles Bronze-Nylon Bushings - Mack 20590487 Stemco K536M 460.542N
Automann

King Pin Kit - Mack FXL12-FXL23M / Volvo FM9 FM12 Axles Bronze-Nylon Bushings - Mack 20590487 Stemco K536M 460.542N

Only 2 left
SKU: 460.542N
$273.50
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Fitment

Fits these trucks

Mack FXL12, FXL14.6, FXL18, FXL20 and FXL23M axlesVolvo FM9 and FM12 applicationsSteer axle knuckle jointsTorque king pin nut to 563-689 lb-ftBushings may need light reaming
Always confirm your year, make & model before ordering.
Part numbers

OEM & interchange numbers

4 cross-refs
Mack 20590487 Mack 301SQ53 Stemco K536M Spicer KPK1109
Direct 1-to-1 replacement for every number above. Tap any number to copy.
Overview

Rebuild the steer axle knuckle joints properly with this King Pin Kit distributed by FleetPro Parts & Tires. It supplies the pins, bushings, shims, bearings and seals for Mack FXL12, FXL14.6, FXL18, FXL20 and FXL23M axles and for Volvo FM9 and FM12 applications. King pin play is what a PM inspection finds as wander, looseness at the wheel and uneven steer tire wear, and it only gets more expensive the longer the truck runs on it. Manufactured by Automann to Fleet Standard specifications, this kit is stocked right here in our Hanover Park, Illinois warehouse for lightning-fast shipping to fleets, diesel repair shops, and owner-operators nationwide.

Back To Zero Play: The Mack FXL King Pin Kit Advantage

This kit is sized to the heavy Mack and Volvo steer axles it serves: an 8.92 in pin at 2.441 in diameter, considerably more pin than a light-duty axle carries. The knuckle rides on bronze and nylon bushings, a combination chosen to hold the pin without the friction of a dry metal-to-metal fit.

Installation detail matters on a joint this size. Torque the king pin nut to 563-689 lb-ft, and expect the bushings to need light reaming to final fit before the knuckle goes back on. Get those two right and the axle comes back tight, with the steering feel the driver remembers.

At FleetPro Parts & Tires, we know a steering job is only right when the part is right. This kit is a direct replacement for highly searched industry numbers including Mack 20590487, Stemco K536M, Mack 301SQ53 and Spicer KPK1109.

Vehicle Fitment & Compatibility

This heavy-duty aftermarket king pin kit is intended for the following commercial applications:

  • Mack Axles: FXL12, FXL14.6, FXL18, FXL20 and FXL23M
  • Volvo Applications: Volvo FM9 and FM12
  • Position: Steer axle knuckle joints
  • Component Group: Steering / King Pins & Bushings
  • Installation: Torque king pin nut to 563-689 lb-ft; bushings may need light reaming

Direct Replacement & Cross-Reference Numbers:

This Automann king pin kit serves as a direct replacement for the following part numbers:

  • Mack Interchange: 20590487, 301SQ53
  • Stemco Interchange: K536M
  • Spicer Interchange: KPK1109
  • Automann Distributor #: 460.542N

Technical Specifications

  • Component Type: King Pin Kit
  • Pin Length: 8.92 in
  • Pin Diameter: 2.441 in
  • Bushings: Bronze and nylon
  • Fits: Mack FXL12 / FXL14.6 / FXL18 / FXL20 / FXL23M axles; Volvo FM9, FM12
  • Install Torque: 563-689 lb-ft on the king pin nut
  • Weight: 23.65 lbs
  • Product Level: Fleet Standard Aftermarket
  • Brand: Automann (Distributed by FleetPro Parts & Tires)
Key features
  • Bronze and Nylon Bushings: The knuckle rides on a bronze and nylon combination rather than a dry metal-to-metal fit, holding the pin with less friction.
  • Heavy Mack Axle Sizing: An 8.92 in pin at 2.441 in diameter covers the Mack FXL12 through FXL23M range in one part number.
  • Volvo FM Coverage: The same kit serves Volvo FM9 and FM12 applications, so one number covers two fleets' worth of steer axles.
  • Torque Spec Included: The king pin nut spec of 563-689 lb-ft is called out, so the joint gets clamped to the number instead of by feel.
  • Cures the PM Write-Up: Replaces the king pin play that causes wander, looseness at the wheel and uneven steer tire wear.
Specifications
Component Type
King Pin Kit
Pin Length
8.92 in
Pin Diameter
2.441 in
Bushings
Bronze and nylon
Fits
Mack FXL12 / FXL14.6 / FXL18 / FXL20 / FXL23M axles; Volvo FM9, FM12
Install
Torque king pin nut to 563-689 lb-ft; bushings may need light reaming
Weight
23.65 lbs
Package Dims
12.25 x 9.25 x 6.75 in
UPC
889626060977
Product Level
Fleet Standard Aftermarket
Questions
Will this fit my truck?
This part fits Mack FXL12, FXL14.6, FXL18, FXL20 and FXL23M axles, Volvo FM9 and FM12 applications, Steer axle knuckle joints, Torque king pin nut to 563-689 lb-ft, Bushings may need light reaming. Always confirm your year, make and model before ordering.
What part numbers does it replace?
Yes. It is a direct replacement that interchanges with Mack 20590487, Mack 301SQ53, Stemco K536M, Spicer KPK1109.
How fast does it ship?
In-stock orders placed before 12 PM Central on business days ship the same day from our Hanover Park, IL warehouse, and typically arrive in 2 to 5 business days anywhere in the USA.
What's your return policy?
Unused items in original packaging can be returned within 30 days, backed by our 30-day money-back guarantee. If we ship the wrong part, we cover the return label and send the correct one.