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Crank installation
Cranks are pressed tight onto the tapered square spindle. The square spindle is made with a
slight upward sloping taper. The crank square fitting also has a slight taper. The crank bolt
acts as the pressing tool and forces the arm up the slope of the spindle. The bolt or must be
tight enough to keep from loosening, use a torque wrench and tighten to 30 foot pounds.
Crank Set Testing
1. Cranks connect the pedals to the bottom
bracket spindle. The arms are pressed tightly
to the bottom bracket spindle. Cranks must be
removed from the spindle to service the
bottom bracket bearings.
2. If the crank arm is allowed to be used while it
is loose it may damage the crank arm and the
bottom bracket spindle. Check the crank arms
for looseness and proper fit on the square end
of the spindle if the crank is still wobbly after
the crank bolt is properly tightened using the
crank bolt wrench or a socket to 30 foot
pounds it will need replacement.
Crank removal
1. Remove the chain cover, loosen the flywheel axle bolt and loosen the chain tension screws. Take the
chain off the right side crank.
2. Remove the crank bolts.
3. Use a crank arm puller such as the Park tool number CCP-2 to remove the
crank arms.
4. Look for bolt or nut at end of crank in line with bottom bracket spindle. If no
bolt is visible, remove dust caps.
5. Before installing crank puller into crank, turn puller nut away from internal driver as much as possible. If
puller nut happens to unthread from internal driver, thread it back on only 3-4 turns.
6. Thread large external thread of puller (nut) into arm, taking care not to cross thread. Tighten puller nut
into crank using wrench.
7. Thread internal driver into puller nut. Using handle or adjustable wrench, tighten driver until crank is
loose on spindle. Pull arm from spindle and unthread both parts of tool from arm. Use care not to skin
knuckles when removing tool. Repeat process on other crank.
Star Trac Product Support
Page 14 of 21
800-503-1221
Crank Bolt Wrench CCW-14R
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