Bontrager 253427 User Manual

Part Number 253427  
ROAD CRANKSET OWNER'S MANUAL  
Figure 1- Bontrager road crankset  
Table of contents  
Read this manual before you ride  
Check compatibility before installing  
Inspect your crankset regularly  
Installation instructions  
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4
Bontrager warranty  
READ THIS MANUAL BEFORE YOU RIDE  
Please read all of the supplied instructions thoroughly before using your new  
crankset; the manuals contain important safety and maintenance information.  
If you do not understand the information in this manual, or you have a  
question about your crankset that this manual does not cover, consult your  
Bontrager dealer. If you have a question or problem that your Bontrager dealer  
can’t handle, contact us at:  
Bontrager Components  
Attn: Customer Service  
801 W. Madison Street  
920.478.4678  
Waterloo, Wisconsin 53594  
© Copyright Trek Bicycle Corporation 2004  
All rights reserved  
INSTALLATION INSTRUCTIONS FOR THE  
EXPERIENCED MECHANIC  
These instructions explain the steps to remove an existing crankset and  
install a new one. The correct installation of your crankset is critical to your  
safety, so this work should be performed only by an experienced mechanic. If  
you are not sure of your ability to correctly install this crankset and adjust the  
parts, have the crank installed by your Bontrager dealer.  
Check all parts' compatibility before installing  
The crankset interfaces with the pedals, bottom bracket, chain, and front  
derailleur with its shifter. Each of these parts must be compatible with the  
crankset for the systems of a bicycle to function correctly. If you are not sure if  
this crankset is compatible with your bicycle, consult your dealer.  
Pedal removal and installation  
To remove the pedals  
Note: There are right and left pedals, usually marked with a letter stamped on the  
end of the pedal axle, or on the wrench flats.  
1. Turn the right pedal spindle counter-clockwise to remove the right pedal, the  
opposite direction of tightening (Figure 3).  
2. Turn the left pedal axle clockwise to remove the pedal.  
To install the pedals  
1. Apply a light coat of Wrench Force® synthetic grease or a similar lubricant  
over all the threads.  
See your dealer for a recommended grease.  
2. Place the pedal washer over the pedal threads.  
3. Thread the pedal into the crank arm by hand.  
4. Follow the instructions for tightening pedals in Inspect your crankset  
regularly  
Crank arm removal and installation  
The left crank arm is held in place by a crank bolt (Figure 2).  
To remove a crankarm  
1. Loosen the crankarm bolt on the left crankarm.  
2. Continue turning the crank bolt to remove the crank arm.  
To install a crankarm  
With a self-extracting bolt, the parts must be correctly assembled  
Extractor c  
(Figure 6).  
1. Apply a light coat of Wrench Force® synthetic grease or  
a similar lubricant over all the threads, and the bottom  
bracket axle splines.  
See your dealer for a recommended grease.  
2. Align the splines of the axle with the crank arm, and slide the  
arm onto the axle.  
Crank  
bolt  
When installing the crankarm, note the alignment of the opposite crank  
arm.  
3. Carefully engage the threads of the crank bolt.  
4. Tighten as in Inspect your crankset regularly.  
Figure 6- Self-extractor bolt  
parts  
3
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.  
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 consume
r
.  
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