Huffy BMX - Chain Adjustment Procedure; Bearing Inspection and Maintenance

23
Maintenance
Chain Adjustment
WARNING:
• The chain must remain on the sprock-
ets. If the chain comes o the sprock-
ets, the coaster brake will not operate.
• Do not attempt chain repairs. If there
is a problem with the chain, have a
bicycle service shop make any repairs.
Adjustment:
The chain must be at the correct tightness. If too tight, the bicycle will be diffi cult to pedal.
If too loose, the chain can come o the sprockets.
When the chain
C
is at the correct tightness, you can rotate the crank freely and you can
pull it no more than one-half inch
A
away from a straightedge
B
as shown.
Adjust the tightness of the chain as follows:
• Loosen the axle nuts of the rear wheel.
• Move the rear wheel forward or backward as necessary.
NOTE: Make sure the rear wheel is in the center of the bicycle frame.
• Hold the wheel in this position and tighten securely.
C
B
A
Coaster Brakes
These models are equipped with a rear
‘coaster’ brake that is operated by rotating the
crank backwards.
Operate the coaster brake as follows:
• Push the pedals backward to move the
chain backward
• The chain activates the coaster brake
mechanism that is inside the rear wheel
hub
• As you push the pedals backward with
increasing force, the braking action of the
coaster brake increases.
Inspection of the Bearings
Maintenance
Frequently check the bearings of the bicycle.
Lubricate the bearings according to the lubri-
cation chart or any time they do not pass the
following tests:
Head Tube Bearings
The fork should turn freely and smoothly at
all times. With the front wheel o the ground,
you should not be able to move the fork up,
down, or side-to-side in the head tube.
Crank Bearings
The crank should turn freely and smoothly
at all times and the front sprockets should
not be loose on the crank. You should not be
able to move the pedal end of the crank from
side-to-side.
Wheel Bearings
Lift each end of the bicycle o the ground
and slowly spin the raised wheel by hand.
The bearings are correctly adjusted if:
• The wheel spins freely and easily.
• The weight of the spoke reector, when
you put it toward the front or rear of the
bicycle, causes the wheel to spin back and
forth several times.
• There is no side-to-side movement at the
wheel rim when you push it to the side
with light force.
Gyro Bearings
With the front wheel o the ground the Gyro
Handlebar/Stem/Wheel system should rotate
freely and smoothly 360 degrees without
binding or hitting any cables.