First Fit Installation
Instruction for Stepped Pin, Spanner Nut Secured
2.1
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. Securing spanner nut 6. Threaded washer
The picture shows a female axle but the principle is the same for other designs.
Installation
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.
The spacer is always positioned on the opposite side of the stepped part of the axle. If the pivot already has a spacer, leave it in its position. If the Expander System includes a spacer, place it between the inner sphere of the bearing and the lug ear, with the bevel facing the bearing.
Insert the axle. Install the sleeve, washer and fastener on the side with small axle diameter. Press on the axle end with large diameter until the axial play is eliminated. Tighten the fastener with recommended torque.
Install sleeve, washer and fastener on the side with large axle diameter. Tighten the fastener with recommended torque.
Remove securing spanner nut and threaded washer. Install sleeve. Reinstall securing spanner nut, threaded washer and fastener. Keep the securing spanner nut loose and tighten the fastener with recommended torque. Finally tighten the securing spanner nut against the lug.
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 |
Securing Spanner Nut
Max Torque
| ....M100 | M100.... | - | - | - | - | - | - | |
| Nm | 50 | 80 | - | - | - | - | - | - |
| lb-ft | 37 | 59 | - | - | - | - | - | - |
Final check
Grease the pivot (if applicable). Move the machine through full range of motion several times (typically 10) and recheck the torque. This is normally performed during the final inspection of the machine.” Loosen the securing spanner nut and recheck the torques.
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.
