Life Fitness Lifecycle 9100 Service Manual page 52

Lifecycle 9100 and 9500HR Series Exercise Bikes
How To...REMOVE AND REPLACE THE CRANK ARM AND BEARINGS (Cont)
10. Slide the right CRANK BEARING NUT ASSEMBLY over the CRANK ARM. Using the 32mm crank arm wrench,
install the BEARING CRANK NUT ASSEMBLY until it seats against the SPROCKET. Tighten to 20-30 FT. LBS.
seating torque.
11. Using a clean rag, wipe all accumulated dirt and residue from the CRANK TUBE.
12. Guide the CRANK ARM through the CRANK TUBE by tilting it from a horizontal position to a vertical position
until it has been completely inserted from the right side of the bike to the left side.
13. Slide the left side REVERSE THREADED CRANK BEARING/NUT ASSEMBLY over the CRANK ARM and align
into position. Begin to thread the CRANK BEARINGINUT ASSEMBLY and follow this three step procedure
using a torque wrench:
• Tighten to 9-12 FT. LBS. seating torque
• Back of the BEARING CRANK NUT to loosened state
• Retorque to 4 FT. LBS. ± 10%
14. Slide the new TAB LOCK WASHER over the CRANK ARM with the bent tab facing toward the bike FRAME.
Slide the key of the TAB LOCK WASHER through the notch and into position against the CRANK
BEARINGINUT ASSEMBLY. Align the flat of the bent TAB against the flat of the NUT.
15. Slide the REVERSE THREADED LOCK NUT over the CRANK ARM, thread it into position and with the 32mm
crank arm wrench, tighten the REVERSE THREADED LOCK NUT to 4 FT. LBS. ±10% against the TAB LOCK
WASHER. Remember, this NUT is REVERSE THREADED. Bend the straight tab of the TAB LOCK WASHER
so the flat of the TAB is against the flat of the LOCK NUT, then bend the inner tab of the TAB LOCK WASHER
until it is flush against the flat of the inner CRANK BEARING NUT.
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16. Using a 5/32 inch hex key wrench, loosely install the two new
SPLIT LOCKWASHERS, two new BEARING CLAMP BOLTS
and the four new BEARING CLAMPS against the bike frame to
secure the outer races of the CRANK BEARINGINUT
ASSEMBLIES in place. Tighten the two new BEARING CLAMP
BOLTS to 50-60 In. Lbs. seating torque.
NOTE: THE BEARING CLAMP BOL TS ARE TREA TED WITH A
SPECIAL EPOXY AND CAN BE USED ONL YONCE.
17. Re-install the DRIVE BELT, the SHROUD and replace the
PEDALS from the exercise bike.
6
Torque
50«1 In Lbs
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