Bedienungsanleitung Trek 2012 (Seite 57 von 77) (Englisch)

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54 TREK ASSEMBLY MANUAL 27 April 2012

Supporting Information

Micro-adjust bushing (MAB) system

A properly aligned frameset places the wheels on the same plane, and on a parallel

plane to the bottom bracket shell. Our frame tolerances are among the tightest in the

industry. However, it is possible with full suspension bikes to mate two pieces that

are within tolerance and end up with a complete structure that is out of tolerance. To

solve this problem, we designed the MAB system (Micro-Adjust Bushing, Figure 97).

This feature provides an easy method for adjustment of the alignment between the

main triangle and the swingarm of the bicycle frame. It insures optimal alignment on

each new full suspension bike from the factory, it’s adjustable in the shop, and it can

be retrotted to earlier full-suspension models from Trek, Fisher, and Klein.

The heart of the MAB system is an eccentric bushing installed on the non-drive

side of the main pivot (Figure 98). The bushing is innitely adjustable within a range

yielding +/. 2 mm of alignment change. The position of the eccentric can be adjusted

with a special 30mm cone wrench, available separately.

On all new 2004 bicycles, and those produced afterwards, the alignment is set at the

factory. The bushing is held in place with Loctite® and does not need adjustment.

The system can also be retrotted to all Trek Fuel, Fisher Sugar, and Klein Adept

models from previous years.

Retrotting MAB to an existing bicycle

The MAB system can be retrotted to all Trek Fuel, Fisher Sugar, and Klein Adept

models from previous years. If the mechanic has determined that one of these

frames is out of alignment, the MAB system can be adjusted to align the frame.

These instructions are intended for use by an experienced mechanic. Do not attempt

this procedure if you are not familiar with disassembly and assembly of a full-

suspension bike.

Parts required:

680 Loctite P/N 87669

30mm cone wrench P/N 88623

Micro-adjust bushing P/N 243109

To install the micro-adjust bushing system

1. Disassemble the main pivot link.

2. Remove the original non-drive side bushing from the pivot ear.

3. Set the eccentric bushing in place with the notch at the twelve o’clock position.

Do not Loctite the bushing in place at this time.

4. Reassemble the main pivot link.

5. Rotate the eccentric bushing with the 30mm cone wrench.

6. Rotate the bushing clockwise to move the rear triangle to the non-drive side.

Rotate the bushing counter clockwise to move the rear triangle to the drive side.

For every 90 degrees of rotation, the rear triangle position is changed by one

millimeter at the rear axle.

7. Once the ideal position is identified, mark the location of the notch (Figure 2) with

a permanent marker.

8. Remove the MAB bushing, apply 680 Loctite, and reinstall.

9. Torque the pivot bolts to 95-115 Lb•In (10.7-13 Nm).

680 Loctite requires a cure time of 24 hours.

Figure 97. MAB

Figure 98 MAB on the non-drive side of pivot

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