Nautilus R618 Service Manual
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Nautilus R618 Service Manual

Recumbent bike
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protected by common law in the United States and other countries. Polar
a service mark of Apple Inc. The Bluetooth
Nautilus
™
®
®
ORIGINAL DOCUMENT - ENGLISH VERSION ONLY
™
R618 Recumbent Bike Service Manual
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®
and MyFitnessPal
®
are trademarks of their respective owners. App Store is
Service Manual
8012456.051519.C

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Do you have a question about the R618 and is the answer not in the manual?

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Mike Buck
February 4, 2025

I need part # HH - power inlet (female end) for a Nautilus U618.

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Summary of Contents for Nautilus R618

  • Page 1: Table Of Contents

    ™ Nautilus R618 Recumbent Bike Service Manual Service Manual 8012456.051519.C ™ ™ Table of Contents Section Code Section Page Number Important Safety Instructions Safety Warning Labels and Serial Number Maintenance Leveling the Machine Moving the Machine Connectivity Heart Rate Chest Strap Battery Replacement...

  • Page 2: Important Safety Instructions

    Do not try to do heavy or awkward steps on your own. • If replacement parts are necessary, use only genuine replacement parts and hardware supplied by Nautilus. Failure to use genuine replacement parts can cause a risk to users, keep the machine from operating correctly and void the warranty.

  • Page 3: Safety Warning Labels And Serial Number

    Safety Warning Labels and Serial Numbers WARNING! • Injury or death is possible if caution is not used while using WARNING this machine. • Keep hands and • Keep children and pets away. feet away. • Read and follow all warnings on this machine.
  • Page 4 Specifications 147.4 kg (325 lbs.) Maximum User Weight: Total Surface Area (footprint) of equipment: 11 457 cm2 48.6 kg (107.1 lbs.) Machine Weight: Power Requirements: Input Voltage: 100 - 240V AC, 50/60Hz 124 cm Output Voltage: 9VDC, 1.5A (48.8”) Heart Rate Chest Strap: 1 CR2032 battery 171 cm (67.3”)

  • Page 5: Maintenance

    Maintenance Read all maintenance instructions fully before you start any repair work. In some conditions, an assistant is required to do the necessary tasks. regular maintenance is done. Worn or damaged components must be repaired or replaced immediately. Only manufacturer supplied components can be used to maintain and repair the equipment. If at any time the Warning labels become loose, unreadable or dislodged, replace the labels.

  • Page 6: Moving The Machine

    ® your results and share with friends and family. 1. Download the free Software App, named Nautilus Trainer™. The software app is available on the App Store and Google Play™. For a complete list of supported devices, review the software app on the App Store or Google Play™.

  • Page 7: Heart Rate Chest Strap Battery Replacement

    Heart Rate Chest Strap Battery Replacement The heart rate (HR) chest strap uses a CR2032 battery. Using a coin, loosen the slotted cover on the battery bay. Remove the cover and battery. CR2032 When replacing the battery, insert it in the battery bay with the + symbol facing up.
  • Page 8 Condition/Problem Things to Check Solution Unit operates but Chest Strap (optional) Strap should be “POLAR ” compatible and uncoded. Make ® Telemetric HR not sure strap is directly against skin and contact area is wet. displayed Chest Strap Batteries If strap has replaceable batteries, install new batteries. the WIRELESS HR setting and make sure that the current value is set to ON.
  • Page 9 Bluetooth enabled device Consult your device to be sure that the Bluetooth wireless ® ® feature has been enabled on it. Fitness App is compatible. Contact appsupport@nautilus.com (if inside US/Canada) or your local distributor (if outside US/Canada) for further assistance.

  • Page 10: Console Service Mode

    Condition/Problem Things to Check Solution Workout results not post- Sync accounts From the Menu icon on the Nautilus Trainer™ App, select the ing from Nautilus Trainer Sync to MyFitnessPal or Under Armour Connected Fitness. ™ ® ® to MyFitnessPal / Under ®...
  • Page 11 display shows an incorrect function, the overlay on the Console may be incorrect for that model. If the display Down). All LEDs On 1 second All segments on Set individual segments one at a time until all segments are illuminated. be reset to defaults.

  • Page 12: Maintenance Parts Exploded View

    Maintenance Parts Exploded View Console Stabilizer, Front Servo Motor Console Mast Transport Wheel Brake Assembly Water Bottle Holder Pedals Drive Belt Seat Back Shroud, Right Speed Sensor Magnet Top Cap Shroud, Upper GG Speed Sensor Seat Frame Assembly Shroud, Left Power Inlet Seat Bottom Crank Arm...

  • Page 13: Replacement Procedure Skill Level

    REPLACEMENT PROCEDURE SKILL LEVEL Level III : Advanced - knowledgeable about mechanical procedures When disposing of old parts, obey the applicable local and provincial requirements. For instructions to replace the following parts, please refer to the Assembly Manual for your bike: •...
  • Page 14 Do not try to do heavy or awkward steps on your own. • If replacement parts are necessary, use only genuine replacement parts and hardware supplied by Nautilus. Failure to use genuine replacement parts can cause a risk to users, keep the machine from operating correctly and void the warranty.
  • Page 15 NOTICE: It is necessary to remove the Shrouds for this procedure. Refer to the “Replace the Shrouds” procedure. Disconnect all power to the machine before you service it. Your machine may not match the image. For reference only. Figure 1 1.
  • Page 16 6. Reassembly is the reverse procedure. NOTICE: Be sure not to crimp any cables. Final Inspection Inspect your machine to ensure that all hardware is tight and components are properly assembled. Do not use until the machine has been fully assembled and inspected for correct performance...

  • Page 17: Setting The Brake Tension (Calibration)

    Do not try to do heavy or awkward steps on your own. • If replacement parts are necessary, use only genuine replacement parts and hardware supplied by Nautilus. Failure to use genuine replacement parts can cause a risk to users, keep the machine from operating correctly and void the warranty.
  • Page 18 NOTICE: It is necessary to remove the shrouds for this procedure. Refer to the “Replace the Shrouds” procedure. Your machine may not match the image. For reference only. 1. Disconnect and reconnect the AC Adapter from the wall 2. Push QuickStart and verify that the console shows that the default resistance level is 4.
  • Page 19 (C) and move the Servo Motor assembly (D) until the closest point on the Brake Magnet (A) is within 3.0 mm (1/8”) of the Flywheel (B). Tighten the bolts. Note: If the cardboard is not 3mm (1/8”) thick, you can use the pages of a paperback book to measure 7.

  • Page 20: Part Replacement

    Do not try to do heavy or awkward steps on your own. • If replacement parts are necessary, use only genuine replacement parts and hardware supplied by Nautilus. Failure to use genuine replacement parts can cause a risk to users, keep the machine from operating correctly and void the warranty.
  • Page 21 Disconnect all power to the machine before you service it. Your machine may not match the image. For reference only. 1. Press the edges of the Console Pivot Shroud to disen- gage the tabs from the Console. Remove the Console Pivot Shroud and set it safely aside.
  • Page 22 Do not try to do heavy or awkward steps on your own. • If replacement parts are necessary, use only genuine replacement parts and hardware supplied by Nautilus. Failure to use genuine replacement parts can cause a risk to users, keep the machine from operating correctly and void the warranty.

  • Page 23: Pedals

    Your machine may not match the image. For reference only. 1. Loosen and remove the old Pedals. Discard the old Pedals. Note: The Left Pedal is reverse-threaded. Orientation is based from a seated position on the bike. The Left Pedal has an “L”, the Right Pedal an “R”. 2.
  • Page 24 Do not try to do heavy or awkward steps on your own. • If replacement parts are necessary, use only genuine replacement parts and hardware supplied by Nautilus. Failure to use genuine replacement parts can cause a risk to users, keep the machine from operating correctly and void the warranty.
  • Page 25 Your machine may not match the image. For reference only. 1. Loosen and remove the old Pedals. Set them safely aside for reassembly. Note: The Left Pedal is reverse-threaded. Orientation is based from a seated position on the bike. The Left Pedal has an “L”, the Right Pedal an “R”.
  • Page 26 Thread the Crank Puller into the Crank Arm (B). When the Crank Puller is in the correct position, only 1-2 threads on the outer portion (CP2) of the Crank Puller should show. Note: Be sure the end of the Bolt (CP1) of the Crank use.
  • Page 27 Installation is the reverse procedure. Installation does not require the use of the crank puller. Be sure the Crank Arms are connected at 180° from each other. To reinstall the Pedals, carefully align the threads and hand tighten to prevent cross-threading. Then tighten fully with pedal wrench.

  • Page 28: Transport Wheels, Front Endcaps And Footpads

    Do not try to do heavy or awkward steps on your own. • If replacement parts are necessary, use only genuine replacement parts and hardware supplied by Nautilus. Failure to use genuine replacement parts can cause a risk to users, keep the machine from operating correctly and void the warranty.
  • Page 29 Your machine may not match the image. For reference only. stabilizer (C). The static object should not be compressible. 2. Using a short #2 Phillips screwdriver, loosen and remove the screws (A1) from the Footpad (A), and set them safely aside.

  • Page 30: Shrouds

    Do not try to do heavy or awkward steps on your own. • If replacement parts are necessary, use only genuine replacement parts and hardware supplied by Nautilus. Failure to use genuine replacement parts can cause a risk to users, keep the machine from operating correctly and void the warranty.
  • Page 31 Disconnect all power to the machine before you service it. Your machine may not match the image. For reference only. To remove the Main Shrouds, start at Step 1. To remove only the Rear Shrouds, go to Step 10. 3. Thread the Crank Puller into the Crank Arm (B). When the Crank Puller is in the correct position, only 1-2 threads on the outer portion (CP2) of the Crank Puller should show.
  • Page 32 6. Bend the edges of the Top Shroud to disengage the inside tabs from the Main Assembly, and slide the Top Shroud up the Mast. ed) from the Mast. Gently pull the Mast out and disconnect the cables. Set the hardware, Mast and Console, and Top Shroud safely aside for reassembly.
  • Page 33 8. Using a #2 Phillips screwdriver, remove the 4 screws (indicated) that secure the Left Main Shroud. Remove the the Left Main Shroud. Set the hardware and Shroud safely aside for reassembly. Note: Find the Power Inlet (D) in the Left Shroud. Disconnect the Power Inlet cable (D1) from the wiring harness (E).
  • Page 34 To remove the Rear Shrouds: 10. Using a #2 Phillips screwdriver, loosen and remove the screw that secures the front Seat Rail End Cap. Bend the edges of the rear Seat Rail End Cap to disengage the inside tabs from the Main Assembly, and remove. Set the hardware and Caps safely aside for reassembly.

  • Page 35: Console Mast (Upright Handlebar Assembly)

    Do not try to do heavy or awkward steps on your own. • If replacement parts are necessary, use only genuine replacement parts and hardware supplied by Nautilus. Failure to use genuine replacement parts can cause a risk to users, keep the machine from operating correctly and void the warranty.
  • Page 36 Disconnect all power to the machine before you service it. Note: Your machine may not match the image. For reference only. 1. Remove screws that attach Console to the Mast. 2. Disconnect the Data Cable, Heart Rate Cable and Resistance Cable from the back of the Console. Set the Console and screws safely aside for reassembly.

  • Page 37: Data Cable In The Mast

    ™ ™ ™ 8012590.101518.B NOTICE: This document provides instructions for the replacement of the Data Cable in the Console Mast on the Nautilus ™ R618 Recumbent Bike. If you need assistance, please contact Customer Service (if purchased in US/Canada) or your local distributor (if purchased outside This icon means a potentially hazardous situation which, if not avoided, could result in death or serious injury.
  • Page 38 Disconnect all power to the machine before you service it. Note: Your machine may not match the image. For reference only. 1. Remove screws that attach Console to the Mast. 2. Disconnect the Data Cable, Heart Rate (HR) Cable and Resistance Cable from the back of the Console.
  • Page 39 5. Tie the length of string to the end (A) of the Data Cable at the base of the Mast. Hold the other end of the Data Cable (B) and carefully pull it out of the Mast so that the string the old Data Cable and discard the old cable.
  • Page 40 Do not try to do heavy or awkward steps on your own. • If replacement parts are necessary, use only genuine replacement parts and hardware supplied by Nautilus. Failure to use genuine replacement parts can cause a risk to users, keep the machine from operating correctly and void the warranty.
  • Page 41 Disconnect all power to the machine before you service it. Note: Your machine may not match the image. For reference only. 1. Remove screws that attach Console to the Mast. 2. Disconnect the Data Cable, Heart Rate (HR) Cable and Resistance Cable from the back of the Console.
  • Page 42 5. Tie the length of string to the end (A) of the HR/ Resistance Cable Assembly at the base of the Mast. Hold the other end of the HR/Resistance Cable Assembly (B) and through the length of the Mast. Untie the string from the old HR/Resistance Cable Assembly and discard the old cables.
  • Page 43 Do not try to do heavy or awkward steps on your own. • If replacement parts are necessary, use only genuine replacement parts and hardware supplied by Nautilus. Failure to use genuine replacement parts can cause a risk to users, keep the machine from operating correctly and void the warranty.
  • Page 44 Disconnect all power to the machine before you service it. Your machine may not match the image. For reference only. To remove only the Seat Back, start at Step 3. Using a #2 Phillips Screwdriver, loosen and remove the hardware that attaches the padded Seat Bottom to the Seat Frame Assembly.
  • Page 45 that attaches the Seat Adjustment Handle to the seat slider assembly. Remove the Seat Adjustment Handle. Set the hardware and Seat Adjustment Handle safely aside. Carefully remove the Top Cap from the seat slider bracket, and disconnect the Resistance and Heart Rate Cables.
  • Page 46 Do not try to do heavy or awkward steps on your own. • If replacement parts are necessary, use only genuine replacement parts and hardware supplied by Nautilus. Failure to use genuine replacement parts can cause a risk to users, keep the machine from operating correctly and void the warranty.
  • Page 47 Your machine may not match the image. For reference only. 1. Using a #2 Phillips Screwdriver, remove the 2 screws (*) that secure the Shock Shroud. Turn the Shock Shroud to that attaches the Shock Assembly (A) and the Seat Recline Arm (C) on the Seat Back.
  • Page 48 Do not try to do heavy or awkward steps on your own. • If replacement parts are necessary, use only genuine replacement parts and hardware supplied by Nautilus. Failure to use genuine replacement parts can cause a risk to users, keep the machine from operating correctly and void the warranty.
  • Page 49 Disconnect all power to the machine before you service it. Your machine may not match the image. For reference only. Using a #2 Phillips Screwdriver, loosen and remove the hardware that attaches the padded Seat Bottom to the Seat Frame Assembly. Set the hardware safely aside for reassembly.
  • Page 50 that attaches the Seat Adjustment Handle to the seat slider assembly. Remove the Seat Adjustment Handle. Set the hardware and Seat Adjustment Handle safely aside. Carefully remove the Top Cap from the seat slider bracket, and disconnect the Resistance and Heart Rate Cables.
  • Page 51 10. Using a #2 Phillips screwdriver, loosen and remove the screw that secures the front Seat Rail End Cap. Bend the edges of the rear Seat Rail End Cap to disengage the inside tabs from the Main Assembly, and remove. Set the hardware and Caps safely aside for reassembly.
  • Page 52 14. Installation is the reverse procedure. Note: Self-tapping screws attach the Shrouds to the Frame. NOTICE: Be sure not to crimp any cables. Be sure the tabs in the Top Shroud snap into the Main Assembly. it. Be sure the cables are tucked inside the Top Cap.

  • Page 53: Brake Assembly

    Do not try to do heavy or awkward steps on your own. • If replacement parts are necessary, use only genuine replacement parts and hardware supplied by Nautilus. Failure to use genuine replacement parts can cause a risk to users, keep the machine from operating correctly and void the warranty.
  • Page 54 NOTICE: It is necessary to remove the Shrouds for this procedure. Refer to the “Replace the Shrouds” procedure. It may be necessary to adjust the Brake tension at the end of this procedure. Refer to the “Set the Brake Tension” procedure. Disconnect all power to the machine before you service it.
  • Page 55 6. Installation is the reverse procedure. Tape the cardboard to the new Brake Magnet. Be sure the cardboard will completely cover the new Brake Magnet before installation. NOTICE: Do not crimp the cables. Before fully attaching the Shrouds, remove the cardboard from between the Brake Magnet (A) and the Flywheel (B).
  • Page 56 Do not try to do heavy or awkward steps on your own. • If replacement parts are necessary, use only genuine replacement parts and hardware supplied by Nautilus. Failure to use genuine replacement parts can cause a risk to users, keep the machine from operating correctly and void the warranty.
  • Page 57 NOTICE: It is necessary to remove the Shrouds for this procedure. Refer to the “Replace the Shrouds” procedure. It may be necessary to adjust the Brake tension at the end of this procedure. Refer to the “Set the Brake Tension” procedure. Disconnect all power to the machine before you service it.

  • Page 58: Servo Motor

    Untie the string from the Console Cable (G). Use the pliers to unhook the Tension Spring (J) from the Main Frame. Pull back and release the Magnet Arm (K) enough to disengage it from the Motor Pulley Shaft (L). Servo Motor (A). 10.

  • Page 59: Drive Belt And Flywheel Assembly

    Do not try to do heavy or awkward steps on your own. • If replacement parts are necessary, use only genuine replacement parts and hardware supplied by Nautilus. Failure to use genuine replacement parts can cause a risk to users, keep the machine from operating correctly and void the warranty.
  • Page 60 NOTICE: It is necessary to remove the Shrouds for this procedure. Refer to the “Replace the Shrouds” procedure. It is necessary to adjust the Drive Belt tension at the end of this procedure. Refer to the “Belt Tension Adjustment” procedure. Disconnect all power to the machine before you service it.
  • Page 61 Using needlenose pliers, carefully release the spring (E1) on the Belt Tensioner (E). To remove the hardware from the Flywheel (C), use the 15 mm open end wrench to hold the nut (F) on one side steady and remove the nut on the opposite side with the 15 mm socket and wrench.

  • Page 62: Belt Tensioner Assembly (Idler Assembly)

    Do not try to do heavy or awkward steps on your own. • If replacement parts are necessary, use only genuine replacement parts and hardware supplied by Nautilus. Failure to use genuine replacement parts can cause a risk to users, keep the machine from operating correctly and void the warranty.
  • Page 63 NOTICE: It is necessary to remove the Shrouds for this procedure. Refer to the “Replace the Shrouds” procedure. It is necessary to adjust the Drive Belt tension at the end of this procedure. Refer to the “Belt Tension Adjustment” procedure Disconnect all power to the machine before you service it.
  • Page 64 Do not try to do heavy or awkward steps on your own. • If replacement parts are necessary, use only genuine replacement parts and hardware supplied by Nautilus. Failure to use genuine replacement parts can cause a risk to users, keep the machine from operating correctly and void the warranty.
  • Page 65 NOTICE: It is necessary to remove the Shrouds for this procedure. Refer to the “Replace the Shrouds” procedure. Disconnect all power to the machine before you service it. Your machine may not match the image. For reference only. Carefully remove the Shrouds. Refer to the “Replace the Shrouds”...

  • Page 66: Power Inlet

    Do not try to do heavy or awkward steps on your own. • If replacement parts are necessary, use only genuine replacement parts and hardware supplied by Nautilus. Failure to use genuine replacement parts can cause a risk to users, keep the machine from operating correctly and void the warranty.
  • Page 67 NOTICE: It is necessary to remove the Shrouds for this procedure. Refer to the “Replace the Shrouds” procedure. Disconnect all power to the machine before you service it. Your machine may not match the image. For reference only. Carefully remove the Left Shroud. Refer to the “Replace the Shrouds”...
  • Page 68 3. Loosen and remove the thin Nut from the Power Inlet (C) on the outside of the Shroud. 4. Pull the Power Inlet plug (C) out of the hole toward the inside of the Shroud. Discard the old Power Inlet assembly. Installation is the reverse procedure.

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