Cronus Crankset Troubleshooting; Bearing Play In A Gxp Crank Or Bottom Bracket Assembly - Gary Fisher Cronos Service Information

Cronus 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
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.
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.
26 |
GARY FISHER SERVICE INFORMATION
Solution
First, verify that the crank has been tightened to 420-480
Lb•In (50-57 Nm). 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 53) to increase the bearing preload.
Remove the crankarm and re-install with plenty of grease.
Verify that the crank has been tightened to 420-480
Lb•In (50-57 Nm).
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.
spacer
Wave washer seal
figure 53. sram bearing set
Bearing