Bontrager 253427 Introduction, Inspectt your crankset regularly, Lubricaation and cleaning

Figure 3 Tighhtening pedals

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

Figure 2- Drivvetrain parts

This section explains how to inspect, adjust, and lubricate your crankset.

Inspectt your crankset regularly

Once a month check that the chain is clean, free of rust, and properly oiled. A dirty chain can prematurely wear the chainrings. All links of the chain should pivot smoothly and withouut squeaking, and no links of the chain should be deformed.

Every 3 months check your chain for wear with a chain wear gauge or a ruler. Each full linnk of a new chain measures one inch. If 12 links of your chain measures 12 1/8 inches

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 bolts:

•Crank bolt (Figure 2): 360-415 lb•in (41-47 Nm)

•Chaiinring bolts (steel): 70-95 lb•in (7.9-10.7 Nm)

•Chaiinring bolts (aluminum alloy): 72-80 lb•in (8-9 Nm)

Lubricaation and cleaning

Once a month clean and oil the chain. Place a rag behind the chain to avoid getting oil on the rest of the bicycle. Use Wrench Force® synthetic chain lube or similar lubrica- tion. S ee your dealer for a recommended oil. After oiling your chain, wipe off the excess oil with a rag.

When installing a threaded part, apply a small amount of bicycle grease to the threads, except for aluminum chainring bolts. With aluminum chainring bolts apply a drop of Loctitee 222 to the threads.

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