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Installation Instructions

Straight Pin


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.


Expander System pivot pin comes with a warranty against lug wear of 10 years / 10 000 hours in operation (whichever comes first) from the date of purchase.


A. Female axle. B. Male axle with spanner nut. C. Male axle with nut.


Bolt. 2 Washer. Sleeve. 4 Axle (Pin). 5 Spanner nut. 6 Nut.




Remove any bushings in the lugears 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 any 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.

ATTENTION! If the worn lugs diameter at any point is 2 mm (.080”) or more over original lug diameter contact your dealer or Expander System. You will need oversized sleeves. 



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.

lnsert the axle and position it in the bores. Install the sleeves, then the tension washers and fasteners. Cross-tighten the fasteners with torque as specified.

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

Hex Nuts: Standard Height

Torques M12-M24 ± 10%, M30... +30/-0%

  M12 M14 M16 M20 M24 M30 M36 M42
Nm 65 115 175 250 350 500 600 700
lb-ft 48 85 129 184 258 369 443 516

Hex Nuts: Low Height

All Torques ± 10%

  M12 - M16 M20 M24 M30 - -
Nm 60 - 125 200 275 350 - -
lb-ft 44 - 92 148 203 258 - -

Spanner Nuts

All Torques ± 10%

  M17 M25 M35 M45 M55 M65 M75 M85
Nm 50 120 250 500 600 700 800 900
lb-ft 37 89 184 369 443 516 590 664

Final Check


After initial torque, grease the pivot (if applicable), move the machine through full range of motion several times and recheck the 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 (0.02”) between the washer and the lug. NOTE! If flange design for easy removal of the sleeve is used there should be a minimum distance of 6 mm. ATTENTION! If the washer is in contact with the lug, contact your dealer or Expander System.



To dismount the Expander System, unscrew the fasteners on both sides and remove the washers.


Tap the axle alternatively on each side 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 sleeves and axle. Do not damage the threads.