Precor C842 Service Manual page 73

11. Replace the primary drive belt per procedure 7.14, steps 4-6. This procedure is complete.
12. Remove the left, right and top covers.
13. Remove the left and right crankarms per Procedure 7.2. Slide the left pulley cover off of the
primary pulley axle.
14. Remove the five bolts retaining the right pulley cover. See Diagram 7.23. Remove the right
pulley cover.
15. Loosen the idler pulley locknut and release tension from the primary belt.
16. There are two small screws retaining the left and right hand primary pulley bearings in the
frame. The screws retaining the left hand bearing are easily visible. The primary pulley has
holes in it that will align with and provide access to the right hand bearing retaining screws.
Remove all four bearing retaining screws.
17. Remove the large cease nut from the left side of primary pulley shaft. Slide the primary
pulley out of the frame. The left hand bearing is in the frame bearing pocket, the right side
bearing is part of the primary pulley assembly.
18. If the bearings are being replaced, slide the left hand bearing out of the frame pulley pocket.
Slide the replacement bearing into the left hand frame pocket and fasten it with two of the
bearing retaining screws removed in step 16.
19. Slide the replace primary pulley assembly into place in the frame. Align the holes in the
primary pulley with the bearing retaining holes. Fasten the right hand bearing with the
remaining two screws removed in step 16.
20. Thread the large cease nut, removed in step 17 onto the primary pulley shaft and tighten.
Do not over tighten the cease nut, the primary pulley must turn freely without any wobble or
lateral movement.
21. Set the left hand pulley cover in its mounting position and retain it with screws removed in
step 14. Torque the screws to 50 inch pounds. Slide the left pulley cover onto the primary
shaft.
22. Replace both crankarms per Procedure 7.2.
23. Tension the primary belt per Procedure 5.1.
24. Replace the left, right and top covers.
C842, C842i, C846, C846i Upright and Recumbent Cycle
Page 73