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Installation Instructions - First Fit

Straight Pin, Through Bolt


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

Produce a smarter machine with Expander System!
Whatever your application this is the perfect pivot pin from the first installation.
Contact your dealer or Expander System before proceeding if you have any questions.

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

These instructions are valid for lug holes with following maximum tolerances:
Hole tolerances: H9 according to ISO 286-2.
Lug hole inner surface roughness: Ra 3.2.
Missalignment of lugs: Outer lug distance/500.
If your lugs are outside these specifications please consult Expander System for best installation procedure.

There should be no bushings in the lug ears.



Grease the sleeves and axle, preferably graphite grease.

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.

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.

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