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Installation Instructions

Straight Pin, Through Bolt


Following these instructions will ensure that the Expander System is installed correctly and the pivot life is prolonged.

Congratulations! You have purchased a custom engineered solution to the pivot wear problem on your machine. Contact your dealer or Expander before proceeding if you have any questions.


1 Bolt. 2 Washer. 3 Sleeve. 4 Axle (Pin). 5 Expander flat headed nut for internal hexagon.



Remove any bushings to eliminate future wear between the bushing and the mounting lug.


Repair any structural damage i.e. cracks or bent lug ears before installation.


Smooth out irregularities in the bore surfaces.


The difference between min and max diameter in the worn lugs must be within .06” (1.5 mm) for the sleeves to fit correctly.



Grease the sleeves and axle with grease available, preferably graphite grease. DO NOT GREASE THE THREADS!

NOTE! If applicable: position greasing outlet 90 degrees to force direction to minimize stress concentration at outlet.


Install the Expander System assembled. Position it in the bores and tighten the fastener. Hold the washer with a plier to prevent the axle from turning. Torque as specified on the next page.

Torque recommendations


Hex Bolts

Torques M12-M24 ± 10%, M30... +30/-0%

  M12 M14 M16 M20 M24 M30 M36 M42
Nm 70 115 175 350 500 600 700 900
lb-ft 52 85 129 258 369 443 516 664

After initial torque move machine through full range of motion several times and recheck torque. Check the torque after 10 hours, 40 hours and at regular service intervals to ensure proper seating of the sleeves.


Ensure that there is a minimum distance of 0,5 mm (.02”) between the washer and the lug. ATTENTION! If the washer is in contact with the lug contact your dealer or Expander System.



Dismount bolt and washer. Tap the axle until the tension on the sleeves is released (use a piece of pipe between the axle and the mallet/hammer not to damage the threads). Remove the sleeve with a plier.


Mount a short bolt and remove the axle using a sliding hammer, puller or smililar. Bolt is normally fine pitch and sold by your dealer.

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