Procedure 14 - Checking/Replacing The Pedals; Procedure 15 - Checking/Replacing The Crank Arms - Diamondback 500Sr Service Manual

ment.
b. Sit on the bike and pedal above 80RPM. Stop pedaling and allow the bike to freewheel. If the
noise continues, the damage is most likely to the fl ywheel. If the noise stops, the damage is most
likely to the crank bearings or idler bearings.
c. Slide off the drive belt from the drive pulley.
d. Spin crank by hand to see if there is noise.
e. Spin belt tensioner to see if there is noise.
2. Replacing the bottom bracket bearings
a. Remove the pedals and crank arms from the unit (Procedures 13 & 14)
b. Remove the sidecases from the unit (Procedure 15).
c. Derail drive belt from pulley.
d. Remove the C-ring from the left side of the crank axle.
e. Slide the Drive Pulley with crank axle off the unit. You may have to use a hammer on the left side
to tap on the axle
f. Punch out the defective ball bearings using a shaft and a hammer.
g. Insert the new bearing into the frame of the unit.
h. Install the Drive Pulley and Axle onto the frame from the right side.
i. Keeping pressure on both bearing surfaces, press the bearings so they fi t securely within the
frame.
j. Secure the C-Ring clip into place just beyond this second bearing.
k. Install the sidecases.
l. Install the crank arms, making sure to tighten the crank bolts or nuts to at least 450 kg-cm of
torque.
Procedure 14
Checking/replacing the pedals
1. Pedal inspection
a. Check that the pedals are fi rmly tightened to the crank arms.
b. Spin the pedals with your hand. The bearings should feel smooth.
c. While grabbing the outside edge of the pedal, move it up and down to check for play. They
should have no play
2. Pedal replacement
a. Remove the pedals with a 15mm open end or adjustable wrench (Note: The left pedal is reverse
thread).
b. Reverse the process for installation. Retighten pedals after each 8 hours of use.
Procedure 15
Checking/replacing the crank arms
1. Crank arm inspection
a. Check that the crank spindle bolts or nuts are tight.
b. Check for play by pulling the crank arms laterally. Be sure it isn't a bad crank bearing assembly
causing any movement.
2. Crank arm replacement
a. Remove the pedals with a 15mm open end or adjustable wrench
b. Remove the spindle bolts or nut from the crank arms.
c. Using a standard bicycle crank puller, remove the crank arms.
d. Reverse the process for installation.
Repair Procedures (Continued)
17