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Installation Instruction

Stepped Pin, Spanner Nut Secured - For New Machine Installation

v1-0


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


Expander System will perform as expected from the moment it is installed until the end of its intended lifecycle. Each Expander System comes with a function warranty 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

1

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.

 

2

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.

 

3

Insert the axle. Install securing spanner nut and threaded washer on the side with small axle diameter. Position to achieve a gap between the threaded washer and the lug. Mount and tighten the fastener until the axial play is eliminated.

4

Install sleeve, washer and fastener on the side with large axle diameter. Tighten the fastener with recommended torque.

Remove fastener, 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. Tighten the securing spanner nut.

Torque recommendations

5

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 - -

Securing Spanner Nut

Max Torque

  ....M100 M100.... - - - - - -
Nm 50 80 - - - - - -
lb-ft 37 59 - - - - - -

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

 

6

After initial torque move machine through full range of motion several times. Loosen the securing spanner nut and recheck the torques. 

7

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.