C776i Stairclimber
Page 39
Procedure 7.7 - Replacing a HTD (Toothed) Pulley
1.
Remove the left hand or right hand cover, as required, per Procedure 7.1.
2.
Grasp the stairarm return spring 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.
Rotate the HTD pulley. Note that it free wheels when rotated toward the front of the climber
and engages the primary sheave when rotated toward the rear of the climber. The
replacement pulley must be mounted so it rotates in the same manner. See Diagram 7.4.
Diagram 7.4 - HTD Pulley
5.
Remove the retaining clip from the HTD pulley. Remove the thrust washer from the shaft.
Slide the HTD pulley off of the shaft. Verify that there are three thrust washers, one wave
washer and another thrust washer remaining on the shaft.
6.
Slide the replacement HTD pulley onto the shaft. Verify that it rotates as described in step 4.
Slide the thrust washer onto the shaft. Fasten the HTD pulley with the retaining clip removed
in step 5.
HTD Pulley
Flanged Pulley
Retaining Clip
Primary Sheave
Thrust Washer
Mounting Bolt
Upper
