Bontrager SPEED LIMIT ROAD BRAKESETS Owner's Manual download pdf (Page 35)

33 TREK SERVICE INFORMATION 24 May 2010

Crankset Troubleshooting

This section describes problems that occasionally occur, and possible solutions. If these

solutions do not solve a problem, contact Customer Service.

Bearing play in a GXP crank or bottom bracket assembly

The crank feels loose when grasped at the pedal end and rocked side-to-side.

Cause Solution

Wave washer not

compressed fully

This is usually caused by

insufﬁcient torque on the non-

drive crank arm.

In rare instances a tolerance

stack can be created by the ﬁve

critical parts: non-drive bearing,

drive bearing, drive-side seal,

bottom bracket shell, and axle

length.

First, verify that the crank has been tightened to the torque

specications (see page 38). Most issues with play in

GXP crankarms are resolved when the arms are properly

tightened.

If this does not solve the issue, add a 0.5mm washer/spacer

(PN 294162) between the wave washer and seal (Figure 1)

to increase the bearing preload.

Spline of GXP crankarm is

undersized

• We have seen some variation in

the tolerance of GXP crankarms.

• If the installation torque is not

sufﬁcient, the crank arm will not

completely compress the shield

and bearing race.

Remove the crankarm and re-install with plenty of grease.

Verify that the crank has been tightened to the torque

specications (see page 38).

Re-check the bearings after installation. The GXP axle

spline is tapered, so it requires that the crank be completely

tightened to seat on the axle.

Figure 1. SRAM bearing set

Seal

Bearing

Wave washer

Spacer

1 2 ... 30 31 32 33 34 35 36

Comments to this Manuals

No comments

Bontrager SPEED LIMIT ROAD BRAKESETS Owner's Manual Page 35

Comments to this Manuals

Related products and manuals for Bicycles Bontrager SPEED LIMIT ROAD BRAKESETS