Nautilus U618 User Manual

1
Nautilus
™
U618 Upright Bike Service Manual
8012455.101518.B
Service Manual
Section Code Section Page Number
1 Important Safety Instructions 2
1 Safety Warning Labels and Serial Number 3
 1 ReadingtheProductSpecicationLabel 3
 1 Specications 4
1 Maintenance 5
1 Leveling the Machine 5
1 Moving the Machine 6
1 Connectivity 6
1 Heart Rate Chest Strap Battery Replacement 7
1 Troubleshooting 7
1 Console Service Mode 10
1 Maintenance Parts Exploded View 12
1 Replacement Procedure Skill Level 13
Mechanical Procedures 14
2 Belt Tension Adjustment 14
3 Set the Brake Tension (Calibration) 17
Part Replacement 20
4 Console 20
5 Pedals 22
6 Crank Arms 24
7 Transport Wheels, Front Endcaps and Footpads 28
8 Shrouds 30
9 Handlebar Assembly 35
10 Console Mast 38
11 Data Cable in the Mast 42
12 Brake Assembly 45
13 Servo Motor 47
14 Drive Belt and Flywheel Assembly 51
15 Belt Tensioner Assembly (Idler Assembly) 54
16 RPM Sensor (Speed Sensor) 56
17 Power Inlet 58
™
™
Table of Contents
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App Store is a service mark of Apple Inc. The Bluetooth
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word mark and logos are registered trademarks owned by Bluetooth SIG, Inc., and any use of such marks by Nautilus, Inc. is under
license.
ORIGINAL DOCUMENT - ENGLISH VERSION ONLY
8021148.101518.A

Nautilus U618 Specifications

General

Bluetooth Connectivity	Yes
User Profiles	4
Resistance Type	Magnetic
Transport Wheels	Yes
Display	LCD
Heart Rate Monitoring	Contact
Seat	Adjustable
Flywheel Weight	18 lbs
Maximum User Weight	150 kg

Summary

Nautilus U618 Bike Safety and Specifications

Important Safety Instructions

Critical safety warnings for servicing and operation.

Specifications Overview

Key technical details including dimensions, weight, and power requirements.

Nautilus U618 Bike Maintenance and Troubleshooting

Maintenance Schedule

Routine maintenance tasks for daily, weekly, and monthly checks.

Troubleshooting Common Issues

Solutions for common operational problems and error codes.

Belt Tension Adjustment Procedure

Brake Tension Calibration Procedure

Console Replacement Procedure

Pedal and Crank Arm Replacement

Pedal Replacement

Steps to remove and install pedals.

Crank Arm Replacement

Guide for replacing the bike's crank arms.

Shroud and Handlebar Assembly Replacement

Shroud Replacement

Instructions for removing and reinstalling the machine's shrouds.

Handlebar Assembly Replacement

Procedure for replacing the handlebar assembly.

Console Mast and Data Cable Replacement

Console Mast Replacement

Steps to replace the console mast.

Data Cable Replacement

Guide for replacing the data cable in the console mast.

Brake Assembly and Servo Motor Replacement

Brake Assembly Replacement

Procedure to replace the brake assembly unit.

Servo Motor Replacement

Steps for replacing the servo motor.

Drive Belt and Tensioner Replacement

Drive Belt and Flywheel Assembly Replacement

Guide for replacing the drive belt and flywheel.

Belt Tensioner Assembly Replacement

Procedure for replacing the belt tensioner assembly.

Sensor and Power Inlet Replacement

RPM Sensor (Speed Sensor) Replacement

Steps to replace the RPM sensor.

Power Inlet Replacement

Instructions for replacing the unit's power inlet.