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First Fit Installation

Instruction for Straight Pin, Through Bolt


Follow the installation instructions to ensure that the Expander System is installed correctly and to prolong the pivot life.

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.


This instruction is valid for lug holes with the following maximum tolerances:
- Hole tolerances: H9
- Lug hole inner surface roughness: Ra 3.2
- Misalignment of lugs: Outer lug distance/500
- There should be no bushings in the lug ears

If your lugs are not within these specifications, please consult your dealer or Expander System for installation recommendation.


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




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 loosely 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

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! For flange design, there should be a minimum distance of 6 mm for easy removal of the sleeve. ATTENTION! If the washer is in contact with the lug, contact your dealer or Expander System.