C776i Stairclimber
Page 42
Procedure 7.9 - Replacing the Primary Sheave
1. Remove the left hand cover, right hand cover and rear cover per Procedure 7.1.
2. Grasp one of the stairarm return springs and carefully remove it from its mounting peg. See
Diagram 5.1.
3. Support the stairarm and remove the stairarm belt from both flanged pulleys and the HTD
pulley. Lower the stairarm to its lowest position.
4. Repeat steps 2 and 3 with the remaining stairarm belt.
5. Remove the retaining clip from one of the HTD pulleys. Remove the thrust washer from the
shaft. Slide the HTD pulley off of the shaft. Remove the remaining three thrust washers,
wave washer and another thrust washer from the shaft.
6. Remove the remaining HTD pulley as described in step 5.
7. Remove tension from the primary belt with the secondary sheave tension adjusters. See
Diagram 7.7.
8. Remove the four bolts and nuts (two each side) that fasten the flange bearing assemblies to
the frame. See Diagram 7.6.
Diagram 7.6 - Primary Sheave Mounting
9. Slide the primary sheave out the frame and remove it from the primary belt.
Mounting
Bolt & Nut
Flanged
Bearing
Assembly
Primary
Pulley
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