4bontrager warranty, Bottom bracket removal and installation – Bontrager 253427 User Manual

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Bontrager Warranty

Trek Bicycle Corporation warrants each new Bontrager component against defects

in workmanship and materials for the a period of one year from the date of sale.

This warranty does not cover-

• Normal wear and tear
• Improper assembly
• Improper follow-up maintenance
• Installation of parts or accessories not originally intended for, or compatible

with, the wheels as sold

• Damage or failure due to accident, misuse, abuse, or neglect
• Labor charges for part replacement or changeover

This warranty is void in its entirety by any modification of the component or

its parts.

This warranty is expressly limited to the repair or replacement of a defective

item and is the sole remedy of the warranty. This warranty extends from the

date of purchase, applies only to the original owner, and is not transferable.

Trek is not responsible for incidental or consequential damages. Some states

do not allow the exclusion of incidental or consequential damages, so the above

exclusion may not apply to you.

Claims under this warranty must be made through an authorized dealer. Proof

of purchase is required.

This warranty gives the consumer specific legal rights, and those rights may

vary from place to place. This warranty does not affect the statutory rights of

the consumer.

the consumer.

Bottom bracket removal and installation

A conventional crankset is comprised of a left crankarm, right crankarm, and

bottom bracket. With the Bontrager Road crankset, the right crank arm and

bottom bracket are inseparable.

To remove a standard bottom bracket

1. Loosen the crankarm bolt on the left crankarm and remove the left crankarm.
2. Loosen the crankarm bolt on the right crankarm and remove the right

crankarm.

3. Using the proper tool, loosen and remove the left ("adjustable") bottom

bracket cup.

The left cup is right-hand threaded, and the right cup is left-hand (reverse) threaded.

3. Using the proper tool, loosen and remove the right ("fixed") bottom bracket

cup.

To install a Giga-Pipe bottom bracket

Make sure the frame's bottom bracket shell threads are clean and in good

condition. If necessary, chase and face the threads.

Grease all threaded surfaces, the bearing surfaces of the crank bolt, the

interfaces between the bearings and axle, the axle splines, and also the bearing

side of the seals.
1. Install the right bottom bracket cup, and tighten to 300-360 lb•in (34-41Nm).
2. Install the left bottom bracket cup, and tighten to 300-360 lb•in (34-41Nm).
3. Pass the bottom bracket axle through the right cup to the left cup.
4. Attach the left crankarm and tighten the crank bolt to 360-415 lb•in (41-47 Nm).
5. Check the left crankarm for play.

If there is play, remove both crankarms, grease the contact between the bottom

bracket axle and the bearings, and reinstall. It may require installing the cranks

several times to eliminate all play.

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