SCIFIT PRO1 Sport Operating and safety instructions

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PRO1 Jackshaft Assembly Replacement
Fig. 1
1. Remove covers using the “PRO1 Cover Removal and Replacement”
procedure.
2. Remove the jam nuts and beveled mall washers from the brake tension
bolt on the front of the display support (A2444). (Fig. 1)
3. Remove the front support bolts with lock washers on each side of the unit,
using a 1/2 “socket or wrench. (Fig. 1)
4. Loosen the rear support bolts with washers but do not remove. (Fig. 1)
5. Hinge the display support to the upright position. (Fig. 1)
6. Mark the position of the brake mounting bolts on the monocoque. (Fig.1)
7. Loosen the four (4) brake mounting bolts but do not remove. (Fig. 1)
8. Slide the brake (S1906) along the slots in the monocoque to relieve belt
tension. (Fig. 1)

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Fig. 2
9. Using a 5/32” Allen wrench, remove the bolt and washer located in the
middle of the each bearing retaining washer (A1972). (Fig. 2)
10.Remove the bearing retaining washers. (Fig. 2)

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11.Using a ½” socket, remove the bolts and washers from the bearing
housings (A1660) mounting the jackshaft assembly (A3588). (Fig. 2)
12.Remove the bearing housings from the end of the jackshaft. (Fig. 2)
13.Carefully remove the jackshaft assembly from the monocoque by
unhooking the chains and belt and sliding the assembly out the direction
of the black pulley (P1097). (Fig. 2)
14.Insert the new jackshaft assembly through the belt and chains. (Fig. 2)
15.Install the belt on the black pulley. (Fig. 2)
16.Insert the bearing housings on the ends of the jackshaft. (Fig. 2)
17.With the thin side of the bearing housings facing down, mount the bearing
housings but do not tighten the bolts. (Fig. 2)
18.Push the bearing housings toward the monocoque as far as they can go.
The bolts should be resting up against the slots closest to the fat side.
(Fig. 2)
19.Tighten bolts mounting the bearing housings (A1660). Do not over-
tighten the bolts. Over-tightening the bolts can result in cracking the
bearing housings. (Fig. 2)
20.Insert Allen bolts and lock washers through the bearing retaining washers
and thread into the jackshaft (A3545). Tighten Allen bolts. (Fig. 2)
21.Close the cover support and reinstall the front support bolts and washers.
22.Tighten front support bolts. (Fig. 1)
23.Tighten rear support bolts. (Fig. 1)
24.Reinstall the beveled mall washers and jam nuts on the brake tension bolt.
(Fig. 1)
25.Tighten the jam nuts until the brake mounting bolts are back in their
original positions (as marked on the monocoque). (Fig. 1)
26.Tighten the brake mounting bolts. (Fig. 1)
27.Rotate crank or pedal to make sure everything is aligned and there is
smooth operation before proceeding.
28.Rotate crank or pedal to where the display will come on. Press START on
the keypad, increase resistance by pressing the UP arrow so the unit will
have high resistance.
29.Replace side covers and do a complete operations test. Testing it in the
ISO STRENGTH mode or at the highest resistance is recommended.