Crank Set; Lubrication And Adjustment – One Piece Cranks; Cotterless Crank; Standard Bottom Bracket Assembly - Infinity MOUNTAIN BICYCLE Owner's Manual

Detailed Maintenance
5

Cotterless Crank

Fixed Cup
Ball Bearing
Axle
Lockring
Adjusting
Cup
5
Standard Bottom Bracket Assembly (Cotterless)
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CRANK SET

The crank set refers to the bottom bracket axle and bearing, the crank
arms, and chainrings.
Your bike may be fitted with either a one piece crank, where the crank
arms and bottom bracket are single component, or cotterless cranks,
where the crank arms bolt onto the bottom bracket axle without using
old fashioned type cotterpins. The one piece system is simpler and
requires less maintenance, while the cotterless system requires a little
extra care.
Never ride your bike if the cotterless cranks are loose.
This may be dangerous and will damage the crank arms
beyond repair.
Inspection
The crank set should be checked for correct adjustment and tightness
every month. Cotterless crank axle nuts must be kept tight, and the
bottom bracket bearings must be properly adjusted. Remove the chain
and try to move the cranks from side to side with your hands. The
cranks should not move on the axle, and there should be only very
slight movement in the bottom bracket. Next, spin the cranks. If they
don't spin freely without grinding noise, then adjustment or lubrication
will be needed. Also check that there are no broken teeth on the
chainrings, and wipe off excess dirt and grease that may have built up
on them.
Lubrication and Adjustment – One Piece Cranks
To adjust the free play in a on piece type bottom bracket, loosen the locknut on the left side by turning in clockwise and tighten the
adjusting cone counter-clockwise using a screwdriver in the slot. When correctly adjusted, re-tighten the locknut counter-clockwise.
To disassemble:
1. Remove the chain from the chainwheel
2. Remove the left pedal by turning the spindle clockwise
3. Remove the left side locknut by turning it clockwise and remove the keyed lockwasher.
4. Remove the adjusting cone by turning it clockwise with a screwdriver.
5. Remove the left ball retainer, slide the crank assembly out of the frame to the right, and remove the right ball retainer.
Clean and inspect all bearing surfaces and ball retainers, and replace any damaged parts. Pack the ball bearing retainers with
grease, then re-assemble in the reverse of the above procedure.
Fixed Cone
Ball Retainer
Crank
Chainwheel
Detailed Maintenance
Bearing Cup
Locknut
Lockwasher
Adjusting Cone
Bearing Cup
Ball Retainer
One Piece Crank Assembly
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