Schwinn S.C. 5 User manual

SERVICE
MANUAL
Schwinn® S.C. 5
Core Health & Fitness

Page 2
PRODUCT SPOTLIGHT ............................................................................................................................................. 3
OTHER MANUALS ............................................................................................................................................. 4
ACCESSORIES ............................................................................................................................................. 5
Cranks & Pedals .......................................................................................... 5
REPLACEMENT PROCEDURES ............................................................................................................................................. 6
Shroud Removal .......................................................................................... 6
Belt Tension .......................................................................................... 7
Belt Replacement .......................................................................................... 8
Pairing & Calibrating the 4iiii Crank ........................................................................................18
Bottom Bracket Replacement ........................................................................................19
TROUBLESHOOTING ........................................................................................................................................... 23
Power & Mechanical Issues ........................................................................................23
Console & 4iiii ........................................................................................23
TABLE OF CONTENTS
Click any text to jump to section

Page 3
9-7410 S.C.™ 5
Overall Weight Width Length Height User Weight
134 lbs (61 kg) 21” (53 cm) 55” (140 cm) 47” (119 cm) 0-350 lbs (0-159 kgs)
Product Conformity
• EN957-1 (S,H)
• EN957-10 (S,H)
• ASTM F1250-13
• ASTM F2276-10
All products may be covered by US and Foreign Patents and Patents Pending.
PRODUCT SPOTLIGHT

Page 4
Click the links below to load the related complete manuals from our support website.
Safety warnings and warranty information specic to each unit are located in their respective own-
er’s manuals.
Manuals Install Owner’s
AC Performance (100175)
AC Performance (9-7320)
AC Performance Plus
AC Sport
SC5
SC7
SC Power
IC Classic
AC Power
Related Installation Manuals
• MYE PVS Brackets Installation
Consoles
For troubleshooting regarding the consoles available for this bike, chose from one of the service
manuals below:
Manuals Install Service
MPower Echelon2G Console
MPower Echelon2 Console
Cadence Pro
OTHER MANUALS

Page 5
Standard Schwinn pedals have threaded shafts that connect to the crank arms. The right pedal is
right-hand threaded while the left pedal is reverse threaded, meaning you turn to the left to tight-
en and right to loosen. For pictures of all dierent Schwinn pedals, see document 637-4501 on our
support site. For a comprehensive list of accessories for Schwinn, see document 637-8608.
Cranks & Pedals SKU
Power 4iiii 718-5765
KEO
DELTA
MPower 740-8941
Pedals Standard Double Link 740-9020
Triple Link MT LOOK Delta-compatible 740-8689
Triple Link MT LOOK Keo-compatible 718-5869
ACCESSORIES

Page 6
Shroud Removal
REPLACEMENT PROCEDURES
1. Remove the rubber chainguard cap.
2. Remove the screws from the user right chainguard (inset).
3. Use a Phillips screw driver and 5mm hex key to remove the
screws securing the user left Chainguard to the bike.
4. Rotate the chainguard downward to remove

Page 7
Belt Tension
1. Remove the rubber chainguard cap from the right hand
shroud.
2. Remove the rubber cap from the user left side.
3. Use a 19mm socket to loosen the axle bolts on both sides
of the ywheel.
4. Use a small crescent wrench to loosen the tension screw
lock nuts on both sides of the ywheel.
5. Use a 3mm allen key to adjust the left and right tension-
screws by turning clockwise to tighten and counter-clock-
wise to loosen. Be sure to adjust the bolts evenly so that
the ywheel is not angled between the forks.
6. Fine adjustment to the belt tension can be done using a
13mm open-ended wrench to loosen or tighten the ten-
sioner spring on the idler arm.
7. Check belt tension using a sonic tension meter in the cen-
ter of the belt span. The belt should measure ~84 Hz.
8. If you do not have a sonic tension meter, you can use a
tensioning app to measure the frequency.
NOTE: App settings are provided for convenience. Core
does not support third-party apps.
9. Once proper tension has been achieved, re-tighten the
tension screw lock nuts.

Page 8
Belt Replacement
1. Remove the rubber chainguard cap.
2. Remove the screws from the user right chainguard (inset).
3. Use a Phillips screw driver and 5mm hex key to remove the
screws securing the user left Chainguard to the bike.
4. Rotate the chainguard downward to remove
5. Remove the rubber cap from the user left side.
6. Use a 19mm socket to remove the axle bolts and axle spac-
ers on both sides of the ywheel.
NOTE: The axle spacers are left-right specic.
7. BEFORE REMOVING TENSION SCREWS: Make note of the
thread count so the screws can be reinstalled into the same
position.
8. Use a small crescent wrench to loosen the tension screw
lock nuts on both sides of the ywheel.
9. Use a 3mm allen key to remove the left and right tension
screws.

Page 9
10. Use a 13mm open-ended wrench to loosen the belt idler
tension spring.
11. Use a 3mm allen key to remove the screw connecting the
idler to the tensioner arm.
12. Carefully walk the belt o of the tensioner pulley then walk
the belt o of the crank pulley.
13. Rotate the ywheel back and down to the remove the
ywheel from the frame.
NOTE: Take care as the ywheel is heavy.

Page 10
14. Use a 3mm allen key and a 13mm open-ended wrench to
remove the two (2) screws and nuts connecting the cross
brace to the front right fork. Repeat this step for the other
side.
15. Push the front of the cross brace away from right front fork
to create a gap then slide the old belt through the gap.
Slide the new belt through this same gap then follow the
directions in reverse to install the new belt.
16. BEFORE TIGHTENING THE AXLE BOLTS: Use a 3mm allen
key to adjust the left and right tensionscrews by turning
clockwise to tighten and counter-clockwise to loosen. Be
sure to adjust the bolts evenly so that the ywheel is not
angled between the forks.
17. Fine adjustment to the belt tension can be done using a
13mm open-endedwrench to loosen or tighten the ten-
sioner spring on the idler arm.
18. Check belt tension using a sonic tension meter in the cen-
ter of the belt span. The belt should measure ~84 Hz.
19. If you do not have a sonic tension meter, you can use a
tensioning app to measure the frequency.
NOTE: App settings are provided for convenience. Core
does not support third-party apps.
20. Once proper tension has been achieved, re-tighten the
tension screw lock nuts.

Page 11
Pedal Replacement (Morse Taper)
1. Use an 8mm allen key to remove the pedal bolt.
NOTE: The crank arm and pedal are shown detached from the
bike for clarity only, it is not necessary to remove the crank arm.
2. Thread a crank puller tool with the smaller 11mm tip into
the crank arm, then use the tool to push the pedal out of
the crank arm.
3. Push the new pedal into the crank arm, then use a torque
wrench coupled with an 8mm allen socket to reinstall the
pedal bolt and torque to the value below:
35-40 ft-lb / 47-54 Nm
11mm

Page 12
1. Ensure the bike is level by adjusting all four leveling feet.
Turn the leveling foot clockwise to lower the bike and
counter-clockwise to raise the bike. When leveled properly,
the bike should not wobble or lean to any one side.
Adjusting Leveling Feet

Page 13
1. Remove the rubber chainguard cap.
2. Remove the screws from the user right chainguard (inset).
3. Use a Phillips screw driver and 5mm hex key to remove the
screws securing the user left Chainguard to the bike.
4. Rotate the chainguard downward to remove
5. Use a 13mm open-ended wrench to loosen the belt idler
tension spring.
6. Pull up on the idler arm while walking the belt out from
under it.
Crank Arm Replacement

Page 14
7. Walk the belt o of the crank arm.
8. Use an 8mm allen key to remove the crank bolt
9. Thread a crank puller tool with the smaller 11mm tip into
the crank arm, then use the tool to pull the crank arm o
the bottom bracket.
10. Use a torque wrench coupled with an 8mm allen socket to
reinstall the crank bolt and torque to the value below:
40-44 ft-lb / 55-60 Nm
11. Walk the belt back onto the crank pulley, lift up the idler
arm, then slip the belt back underneath the idler pulley.

Page 15
12. Fine adjustment to the belt tension can be done using a
13mm open-ended wrench to loosen or tighten the ten-
sioner spring on the idler arm.
13. Check belt tension using a sonic tension meter in the cen-
ter of the belt span. The belt should measure ~84 Hz.
14. If you do not have a sonic tension meter, you can use a
tensioning app to measure the frequency.
NOTE: App settings are provided for convenience. Core
does not support third-party apps.

Page 16
1. Use an 8mm allen key to remove the crank bolt.
2. Thread a crank puller tool with the larger 16.5mm tip into
the crank arm, then use the tool to pull the crank arm o
the bottom bracket.
3. Ensure the opposite side crank arm is at the 12 o’clock
position then push the new crank arm onto the bottom
bracket at the 6 o’clock position.
4. Use a torque wrench coupled with an 8mm allen socket to
reinstall the crank bolt and torque to the value below:
40-44 ft-lb / 55-60 Nm
5. Use a small phillips screwdriver to remove the screw
securing the battery cover, remove the battery cover,
then install the batteries. Once the batteries are installed,
replace the cover and screw.
6. Ensure that the rider’s right crank arm is at the 6 o’clock
position then push the crank onto the bottom bracket.
Finally, using a torque wrench with an 8mm allen socket
attached, torque the crank bolt to 40-44 ft-lb (55-60 Nm).
4iiii Crank Replacement

Page 17
7. Install the pedal into the crank arm then use a torque
wrench and a 8mm allen socket to torque to the pedal
bolt according to the specications below:
• Threaded Pedal: 25-30 ft-lb (34-40 Nm)
• Morse Taper Pedal: 33 -37 ft-lb (45-50 Nm)
NOTE: The pedal MUST be torqued to the above specications
otherwise a failure of the pedal may occur.

Page 18
Pairing & Calibrating the 4iiii Crank
1. Press and hold “STAGE” and “AVG/MAX”for 3-5 seconds to
access the service menu.
2. Use “AVG/MAX”to scroll until “SENSOR TYPE” is displayed
then push the backlight button to access the sensor menu.
Ensure that“4iiii” is displayed as the sensor type.
3. If the sensor type is set to “Echelon 2” press the backlight
button to select the sensor type, use the “AVG/MAX” button
to select “4iiii” then press the backlight button again.
4. Once “4iii”is selected the console will enter the pairing pro-
cess, check the label on the power sensor for a 5-digit ANT+
ID code. Enter this code on the “ENTER ANT ID”screen using
“AVG/MAX” to scroll and the backlight to enter the ANT+ ID.
5. Once the ANT+ ID has been entered, pedal the bike, then
select “PAIRING SPIN CRANK”by pushing the back-light
button. If pairing does not pass, check to ensure the ANT+
ID is correct and try the pairing process again. It may take
2-3 attempts to pair successfully.
6. After successfully pairing the 4iiii crank, the power sensor
must be calibrated BEFORE riding the bike. Press and hold
STAGE and AVG/MAX for 3-5 seconds to access the service
menu then use AVG/MAX to scroll until “CALIBRATE” is dis-
played then select it using the back-light button.
7. “ZERO RESET” will be displayed, press the back-light button
to select it. Once “SPINCRANK”is displayed, spin the crank
and press the back-light button to proceed. Ensure that the
left crank arm is in the 6 o’clock position then follow the on-
screen directions to nish calibrating the sensor.

Page 19
Bottom Bracket Replacement
1. Use a 35mm open-ended wrench to remove the bottom
bracket retaining nut.
2. Use a rubber mallet to tap the bottom bracket shaft and
one of the bearings from the user right side and out of the
left side of the box.
3. Remove the bottom bracket shaft and bearings from the
frame.
4. Apply red loctite #620 to both bearings then install the
new bottom bracket.
5. Tighten the bottom bracket retaining nut to 50 ft-lb / 68
N-m

Page 20
Brake Rod Replacement
1. Use a 5mm hex key to remove the screws securing the
right side sweatguard to the bike.
2. Remove the retaining screw (blue) from the top cap, then
pull out the front pop pin (blue), then pull upwards on the
brake top cap (yellow) to remove it.
3. Turn the brake knob clockwise to lower the brake assem-
bly down onto the ywheel.
4. Use a 27mm open-ended wrench to remove the brake rod
assembly while turning clockwise to disconnect the brake
rod assembly from the brake adjustment nut