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If you have a question or problem that your Bontrager dealer can’t handle, contact us at: Bontrager Components 920.478.4678 Attn: Customer Service 801 W. Madison Street Waterloo, Wisconsin 53594 © Copyright Trek Bicycle Corporation 2004 All rights reserved Introduction The crankset is part of the drivetrain, the group of parts on the bicycle that transmit power to the rear wheel (Figure 2): • Pedals (and toe-clip assemblies on some models) • Crankset-left and right crank arms, chainring(s), and bottom bracket (the axle and bearings on which the crankset rotates). • Chain • Cassette This section explains how to inspect, adjust, and lubricate your crankset. Figur FigurFigure ee 2 22- --Driv DrivDrivetrain parts Inspect InspectInspect your crankset regularly O OOn nnc cce a month check that the chain is clean, free of rust, and properly oiled. A dirty c cch hha aai iin nn c ccan prematurely wear the chainrings. All links of the chain should pivot smoothly and w wwi iit tth hho oou uut squeaking, and no links of the chain should be deformed. .. Every EveryEvery 3 months check checkcheck your youryour chain chainchain for forfor wear wearwear with withwith a aa chain chainchain wear wearwear gauge gaugegauge or oror a aa ruler rulerruler. .. Each EachEach. Each ruler full fullfull link linklink of a new chain measures one inch. If 12 links of your chain measures 121/8inches or more, it should be replaced. With good maintenance, a chain usually lasts 1000 to 1500 miles. A worn chain will cause the chainrings of your crankset to wear prematurely. Replacing the chain takes special tools and training and should only be done by your dealer. Every 3 months inspect your pedals. Tighten the pedals into the crank arms; turn the right pedal clockwise, but the left pedal counter-clockwise (Figure 3): • Pedals: 350-380 lb•in (40.2-42.9 Nm). Every 3 months inspect the crankset. Clean the chainrings and inspect them for damage. If any teeth are bent or broken, have the chainring replaced by your dealer. Note that on some chainrings, a few teeth have a special shape to enhance shifting. Also check the bottom bracket adjustment, and tighten the crank Figur FigurFigure ee 3 33 T TTigh ighightening pedals bolts: • Crank bolt (Figure 2): 360-415 lb•in (41-47 Nm) • •• Chainring ChainringChainring bolts (steel): 70-95 lb•in (7.9-10.7 Nm) • •• Chainring ChainringChainring bolts (aluminum alloy): 72-80 lb•in (8-9 Nm) L LLubric ubricubrication ationation and cleaning Once OnceOnce a month clean and oil the chain. Place a rag behind the chain to avoid getting oil oiloil on onon the rest of the bicycle. Use Wrench Force® synthetic chain lube or similar lubrica tion. tion.tion. See SeeSee your dealer for a recommended oil. After oiling your chain, wipe off the excess oil with withwith a aa rag. When WhenWhen installing a threaded part, apply a small amount of bicycle grease to the threads, ex exexcept ceptcept for aluminum chainring bolts. With aluminum chainring bolts apply a drop of Loctite LoctiteLoctite 222 to the threads. threads.threads. INSTALLATION INSTRUCTIONS FOR THE EXPERIENCED MECHANIC 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 (Figure 6). 1. Apply a light coat of Wrench Force® synthetic grease or a s...