Procedure 7.6 - Replacing a Crankarm Assembly
Warning: Care must be taken when work is being performed in the area of the stairarms. Pinch
points exist between the stairarm and ramp and between the stairarm and crankarm, when the
rear covers are removed.
Procedure
1. Set the on/off switch in the “off” position, then unplug the power cord from the A.C. outlet.
WARNING
Before continuing with this procedure, review the Warning and Caution statements listed in
Section One, Things You Should Know.
2. Remove the left and right hand cover sections as described in Procedure 7.1.
3. Remove the left and/or right stairarm assembly as described in Procedure 7.17.
Note:
Notice the position of the two crank arms. When the crankarms are replaced, they must be
positioned so that they are 180 degrees opposing.
4. Remove the bolt that secures the crankarm to the input pulley shaft. It will be necessary to
use a Pitman arm puller or 4” to 6 “gear puller to remove the crankarm. Do not use a
hammer or mallet to remove the crankarm.
5. If you are removing both crank arm assemblies, repeat Steps 3 and 4 for the second
crankarm assembly.
Diagram 7.4 - Crankarm
Crankarm
Bolt
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