Life Fitness T3 Service Manual
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Life Fitness T3 Service Manual

T-series consumer treadmills
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See also: Owner's Manual , Assembly & User Manual
T-Series Consumer Treadmills
T3
T5
T5i/T7i

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Questions and answers

nancy venditti
March 22, 2025

How do I lubricate the LIFE FITNESS t3 Treadmill? With what lubricant exactly?

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1 comments:
Mr. Anderson
March 22, 2025

To lubricate the Life Fitness T3 treadmill, use the Treadmill Lube – LIFE SPAN – LIFE FITNESS T3/T5, which is specifically designed for this model. Apply the lubricant to the running belt and deck as recommended in the treadmill's maintenance instructions.

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Summary of Contents for Life Fitness T3

  • Page 1 T-Series Consumer Treadmills T5i/T7i...

  • Page 2: Service Manual

    Customer Support Services SERVICE MANUAL...
  • Page 3 HOW TO USE SERVICE MANUAL AND CONTACT CUSTOMER SUPPORT SERVICES This service manual is applicable to Treadmill Models T3/T5 and T3i/T5i/T7i. Note: Information represents typical configuration and may differ slightly from actual equipment. The Service Manual provides recommendations of safe and efficient approaches to problem situations.
  • Page 4 Life Fitness T-Series Consumer Treadmills TABLE OF CONTENTS SECTION I TROUBLESHOOTING GUIDE PAGE NO POWER .......................... 2 NO INCLINE.......................... 2 START UP ERROR....................... 3 RUNNING ERROR........................ 3 BELT MOVING ERROR......................3 OVERSPEED ERROR ......................3 FET STUCK –ON ERROR ....................3 RPM NOISE ERROR ......................
  • Page 5 Life Fitness T-Series Consumer Treadmills TABLE OF CONTENTS - Continued SECTION lll HOW TO…REPLACE STRIDING BELT AND DECK ......................2 ADJUSTING BELT TRACKING ...................... 5 ADJUSTING STRIDING BELT TENSION ..................6 MOTOR DRIVE BELT........................7 DRIVE MOTOR..........................8 FRONT ROLLER ..........................9 REAR ROLLER..........................
  • Page 6 ©1998 Brunswick Corporation. All rights reserved. Life Fitness is a registered trademark of Brunswick Corporation. Zone Trainer and Heart Rate Zone Training are trademarks of Brunswick Corporation. Any use of these trademarks, without the express written consent of Brunswick Corporation, is forbidden.

  • Page 7: Troubleshooting Guide

    Life Fitness T-Series Consumer Treadmills TROUBLESHOOTING GUIDE SECTION I TROUBLESHOOTING GUIDE Section 1...

  • Page 8: Troubleshooting

    Life Fitness T-Series Consumer Treadmills TROUBLESHOOTING GUIDE Malfunction Probable Cause Corrective Action No Power. On/Off switch. Turn the switch to the ON position. Insufficient power source. Plug treadmill into a dedicated circuit. Using a voltmeter, verify power at outlet. Verify/Reset 15 amp circuit breaker.
  • Page 9 Life Fitness T-Series Consumer Treadmills TROUBLESHOOTING GUIDE Malfunction Probable Cause Corrective Action Display reads: Belt was commanded to move Verify opto operation in Diagnostics, Motor Test Start up error/Err1 and the opto has not seen any Mode, Section 2. Verify DC voltage at movement or the belts connector P6 pins 1 and 2.
  • Page 10 Life Fitness T-Series Consumer Treadmills TROUBLESHOOTING GUIDE Malfunction Probable Cause Corrective Action Insufficient power source. Plug treadmill into a dedicated circuit. Unit resets randomly or pauses. Line cord improperly seated in Inspect power connection at electrical outlet electrical outlet. and at machine for proper contact.
  • Page 11 Life Fitness T-Series Consumer Treadmills TROUBLESHOOTING GUIDE Malfunction Probable Cause Corrective Action Striding belt slips on front roller Check striding belt & re-tension as necessary. Striding Belt slips during during stall test. See How…To Adjust Belt Tension. footfall. User is pushing striding belt.
  • Page 12 Life Fitness T-Series Consumer Treadmills TROUBLESHOOTING GUIDE Malfunction Probable Cause Corrective Action RF Interference. Move location of machine. Display reads a continuous heart rate. No Chest Strap detected (if Chest strap sensors not making Adjust chest strap and moisten sensors to good contact with body of user.
  • Page 13 Life Fitness T-Series Consumer Treadmills NOTES: Section 1...
  • Page 14 Life Fitness T-Series Consumer Treadmills SECTION II DIAGNOSTICS Section 2...
  • Page 15 Life Fitness T-Series Consumer Treadmills DISPLAY CONSOLES T3/T5 T3i/T5i/T7i Section 2...
  • Page 16 Life Fitness T-Series Consumer Treadmills DIAGNOSTICS MENU INSTRUCTIONS ACCESSING DIAGNOSTICS Press the Stop button twice in a row and then hold down the Quick Start-Walk button or alternatively hold down the Quick Start-Walk button and turn the treadmill ON. The console will automatically jump into the 1 diagnostic state.
  • Page 17 This state shows the current Software Version for the Console, Motor Controller, and Software Part Number. Use the up/down arrow keys for the T3i/T5i and T7i Consoles. Use the time arrow keys on T3/T5 Consoles. Use these keys to toggle between the console software version and the motor controller version. The Console software version number is displayed as “CONSOLE VER=PXX.X”...
  • Page 18 Life Fitness T-Series Consumer Treadmills DIAGNOSTIC STATES - Continued 3. KEYPAD TEST MODE - Continued This state allows you to test the keypad. Anytime you press a key, you will hear a beep, and will see what key you have pressed in the display.
  • Page 19 To test the drive motor use the speed arrow keys to command the motor from 0 MPH to the maximum speed set for the units (10 MPH T3/T3i and 12 MPH T5/T5i/T7i). If the unit is configured to 12 MPH the speed LED will be ON and OFF if its configured to 10 MPH.
  • Page 20 To test the drive motor use the speed arrow keys to command the motor from 0 MPH to the maximum speed set for the units (10 MPH T3/T3i and 12 MPH T5/T5i/T7i). If the unit is configured to 12 MPH the speed LED will be ON and OFF if its configured to 10 MPH.
  • Page 21 If any data item is over the listed maximum you will see dashes in the display “---“. NOTE: For T3/T5 USE SPEED ARROW KEYS TO SCROLL FORWARD AND BACKWARDS. Treadmill Statistics –T7i...
  • Page 22 Life Fitness T-Series Consumer Treadmills DIAGNOSTIC STATES - Continued 5. TREADMILL STATISTICS – Continued Treadmill Statistics -T3i/5i Display Item Data Item T-Time = xxxx:xx Total accumulated workout time - displayed in hours:minutes format (up to 9999:59 = 9999 hours and 59 minutes)
  • Page 23 User Menu State. The Time LED will light to indicate that you are in the 1 state on the T3 and T5 Consoles. HOW TO MOVE AROUND IN THE USERS MENU Use the Enter button to move forward through the User Menu States listed above. Use the Stop button to move backwards.
  • Page 24 Life Fitness T-Series Consumer Treadmills USER MENU STATES – User Statistics USER STATISTICS (T3i/T5i/T7i ONLY) This state displays the currently accumulated statistics for up to 4 different users. Select a user using My Workout key and then press the Enter key. Use the Up/Down arrow keys to move through the statistics. Below is a list of what will be displayed.
  • Page 25 Life Fitness T-Series Consumer Treadmills NOTES: Section 2...
  • Page 26 Life Fitness T-Series Consumer Treadmills SECTION III HOW TO… SERVICE AND REPAIR GUIDE Section 3...
  • Page 27 Life Fitness T-Series Consumer Treadmills How To... Replace The Striding Belt and Deck Tools Required: Hex key wrench set, socket and ratchet set, Phillips screwdriver, Torx wrench set, tape measure, and open end wrench set REMOVAL REMOVAL REMOVAL REMOVAL 1. At the power switch, turn OFF the unit, then unplug the line cord at the wall outlet.
  • Page 28 Life Fitness T-Series Consumer Treadmills How To... Replace The Striding Belt and Deck Tools Required: Hex key wrench set, socket and ratchet set, Phillips screwdriver, Torx wrench set, tape measure, and open end wrench set REMOVAL - Continued REMOVAL - Continued...
  • Page 29 Life Fitness T-Series Consumer Treadmills How To... Replace The Striding Belt and Deck - Continued Tools Required: Hex key wrench set, socket and ratchet set, and Phillips screwdriver, Torx wrench set, tape measure, and open end wrench set INSTALLATION Install the deck and striding belt in the reverse order except as follows: 1.
  • Page 30 Life Fitness T-Series Consumer Treadmills How To... Adjust Striding Belt Tracking Tools Required: Hex key wrench set IMPORTANT: It is CRITICAL that the treadmill be correctly leveled prior to any tracking adjustments. An unstable unit can cause Striding Belt misalignment. To level and stabilize the unit, refer to instructions on “How To…Replace The Leveler Assembly”...
  • Page 31 Life Fitness T-Series Consumer Treadmills HOW TO… How To Adjust Striding Belt Tension Tools Required: Hex key wrench set 1. Locate the two BELT TENSIONING BOLTS on each side of the REAR ROLLER MOUNTING BRACKETS. TENSIONING BOLTS accessible from the holes provided in the REAR ROLLER GUARDS.
  • Page 32 Life Fitness T-Series Consumer Treadmills How To... Replace The Motor Drive Belt Tools Required: Hex key wrench set, socket and ratchet set, Phillips screwdriver, open end wrench set REMOVAL AND INSTALLATION 1. At the power switch, turn OFF the unit, then unplug the line cord at the wall outlet.
  • Page 33 Life Fitness T-Series Consumer Treadmills How To... Replace The Drive Motor Tools Required: Socket and ratchet set, Phillips screwdriver, open end wrench set REMOVAL AND INSTALLATION 1. At the power switch, turn OFF the unit, then unplug the line cord at the wall outlet.
  • Page 34 Life Fitness T-Series Consumer Treadmills How To... Replace The Front Roller Tools Required: Hex key wrench set, socket and ratchet set, Phillips screwdriver, open end wrench set REMOVAL AND INSTALLATION 1. At the power switch, turn OFF the unit, then unplug the line cord at the wall outlet.
  • Page 35 Life Fitness T-Series Consumer Treadmills How To... Replace The Rear Roller Tools Required: Hex key wrench set, socket and ratchet set, Phillips screwdriver, Torx wrench set REMOVAL AND INSTALLATION 1. At the power switch, turn OFF the unit, then unplug the line cord at the wall outlet.
  • Page 36 Life Fitness T-Series Consumer Treadmills How To... Replace The Lifespring Absorbers Tools Required: Hex key wrench set, socket and ratchet set, and Phillips screwdriver REMOVAL AND INSTALLATION 1. At the power switch, turn OFF the unit, then unplug the line cord at the wall outlet.
  • Page 37 Life Fitness T-Series Consumer Treadmills How To... Replace The Lift Motor Tools Required: Phillips screwdriver, socket set, and pliers REMOVAL AND INSTALLATION 1. At the power switch, turn OFF the unit, then unplug the line cord at the wall outlet.
  • Page 38 Life Fitness T-Series Consumer Treadmills How To... Replace The Motor Controller Tools Required: Phillips Screwdriver REMOVAL AND INSTALLATION 1. At the power switch, turn OFF the unit, then unplug the line cord at the wall outlet. 2. Remove motor cover screws(2) under the...
  • Page 39 Life Fitness T-Series Consumer Treadmills How To... Replace The Leveler Assembly Tools Required: 6" level and open end wrench set REMOVAL AND INSTALLATION 1. At the power switch, turn OFF the unit, then unplug the line cord at the wall outlet.
  • Page 40 Life Fitness T-Series Consumer Treadmills How To... Replace The Display Board PCB Tools Required: Phillips Screwdriver Overlay Assembly Telemetry Console Display Console Back Cover Guard REMOVAL AND INSTALLATION 1. At the power switch, turn OFF the unit, then unplug the line cord at the wall outlet.
  • Page 41 Life Fitness T-Series Consumer Treadmills How To... Replace The Telemetry Receiver and Heart Rate Cable Tools Required: Phillips Screwdriver REMOVAL AND INSTALLATION 1. At the power switch, turn Overlay OFF the unit, then unplug Assembly the line cord at the wall outlet.

  • Page 42: Motor Cover

    Life Fitness T-Series Consumer Treadmills How To... Replace The Main Wire Harness Tools Required: Phillips screwdriver, spring hook REMOVAL 1. 1. 1. 1. At the power switch, turn OFF the unit, then unplug the line cord at the wall outlet.
  • Page 43 Life Fitness T-Series Consumer Treadmills How To... Replace The Membrane Switch and Module Buttons Tools Required: Phillips Screwdriver 1. 1. 1. 1. At the power switch, turn OFF the Module unit, then unplug the line cord at the Buttons wall outlet.
  • Page 44 Life Fitness T-Series Consumer Treadmills How To... Replace The Overlay Assembly Tools Required: Phillips Screwdriver REMOVAL AND INSTALLATION Overlay Assembly Telemetry Console Display Console Back Cover Guard 1. 1. 1. 1. At the power switch, turn OFF the unit, then unplug the line cord at the wall outlet.
  • Page 45 Life Fitness T-Series Consumer Treadmills How To... Replace The Handrails and Crossbar Tools Required: Hex key wrench set REMOVAL AND INSTALLATION 1. At the power switch, turn OFF the unit, then unplug the line cord at the wall outlet. 2. Remove two(2) short mounting bolts securing the handrail crossbar and remove the crossbar.
  • Page 46 Life Fitness T-Series Consumer Treadmills NOTES: Section 3...

  • Page 47: Wiring Block Diagram

    Life Fitness T-Series Consumer Treadmills SECTION IV ELECTRONIC OVERVIEW WIRING BLOCK DIAGRAM Section 4...
  • Page 48 Life Fitness T-Series Consumer Treadmills ELECTRONIC OVERVIEW –T3i/T5i/T7i Console Functional Description The T3i/T5i/T7i console is designed to act as an intelligent display and keypad interface. It is intended to work in conjuction with the Motor Control module to form the nucleus of the I/O and control system. The console board periodically reads the keypad input port to check for user inputs, updates and refreshes the status LEDs, data display, and communicates with the Motor Control module.
  • Page 49 Life Fitness T-Series Consumer Treadmills ELECTRONIC OVERVIEW -T3i/T5i/T7i Console - Continued Connector Location Functional Description P3 is a 3 pin connector used to +5 Vdc connect the polar receiver Polar signal module to the console Ground P4 is an 10 pin phone connector...
  • Page 50 Functional Description The T3/T5 console is designed to act as an intelligent display and keypad interface. It is intended to work in conjuction with the Motor Control module to form the nucleus of the I/O and control system. The console board periodically reads the keypad input port to check for user inputs, updates and refreshes the status LEDs, data display, and communicates with the Motor Control module.
  • Page 51 Life Fitness T-Series Consumer Treadmills ELECTRONIC OVERVIEW – T3/T5 Console - Continued Connector and Pin Functions Connector Location Functional Description P4 is an 10 pin phone connector Motor control select Test Relay enable +8 Volts DC +8 Volts DC +8 Volts return...
  • Page 52 Life Fitness T-Series Consumer Treadmills ELECTRONIC OVERVIEW – MOTOR CONTROLLER PCB Functional Description The Motor Controller PCBs are designed to act as an interface between the Drive motor, Display Console, and the Lift Motor. The desired belt speed and elevation is sent down to the motor controller and lift motor via the users selected input into the console.
  • Page 53 Life Fitness T-Series Consumer Treadmills ELECTRONIC OVERVIEW – MOTOR CONTROLLER PCB Connector and Pin Functions Connector Location Functional Description P1 is used to link to from the SS bar and slave selct console to the motor controller SDI serial data in...
  • Page 54 Life Fitness T-Series Consumer Treadmills ELECTRONIC OVERVIEW – BLOCK DIAGRAM Section 4...
  • Page 55 Life Fitness T-Series Consumer Treadmills NOTES: Section 4...
  • Page 56 Life Fitness T-Series Consumer Treadmills SECTION VI MISCELLANEOUS INFORMATION Section 5...

  • Page 57: Preventive Maintenance Tips

    Life Fitness T-Series Consumer Treadmills PREVENTIVE MAINTENANCE TIPS Preventive Maintenance Schedule ITEM WEEKLY MONTHLY QUARTERLY BI-ANNUAL ANNUAL DISPLAY CONSOLE ASSEMBLY Hardware Inspect Overlay Clean Inspect Emergency Clean Inspect Switch/Key HANDLEBAR ASSEMBLY Hardware Inspect Handlebar Inspect Side Hand Rails Inspect FRAME ASSEMBLY...
  • Page 58 6. Follow the Assembly Instructions included in the parts bag to complete the assembly of your treadmill. Left & Right Uprights Hardware Kit Assembly Instructions ( T3 & T3i Only ) Handrail ( T5 & T5i Only ) Handrails Crossbar...
  • Page 59 If any parts are missing, contact Life Fitness Customer Support Services at the number listed on the back page of this assembly instruction booklet.
  • Page 60 UPRIGHT MOUNTING BOLT Qty: 4 (Models T5 & T5i Only) 3/8 - 16 x 3.25” HANDRAIL Qty: 1 STOP CORD Qty: 1 (Models T3 & T3i Only) MOTOR COVER SCREW Qty: 2 6-20 x 6 1” 2” 3” 4” 5”...
  • Page 61 Section 5...
  • Page 62 WHEN LOWERING THE DISPLAY CONSOLE ASSEMBLY (#3) ONTO THE USER LEFT UPRIGHT (#1). MODELS T3 AND T3i ONLY (Models T5 and T5i Skip to Step 5) Locate the HANDRAIL (#11) and one TOP HANDRAIL SPACER (#5). On the user right side of the HANDRAIL insert a SHORT MOUNTING BOLT (#6) through the bottom most of the three top mounting holes of the HANDRAIL.
  • Page 63 WHEN TWISTING THE USER LEFT UPRIGHT (#1) BACK INTO POSITION. Repeat Step 4 for Models T3 and T3i or Steps 5 and 6 for Models T5 and T5i to assemble the USER RIGHT HANDRAIL. For Models T5 and T5i, tighten all five mounting bolts and then back them off one full turn.
  • Page 64 MODELS T5 AND T5i ONLY Locate the HANDRAIL CROSSBAR (#9). With the bend facing upward and pitched toward the DISPLAY CONSOLE, carefully place the HANDRAIL CROSSBAR between the user left and right handrails as shown and align the mounting holes. Insert one SHORT MOUNTING BOLT (#6) on either end of the HANDRAIL CROSSBAR and tighten using a 5/32”...
  • Page 65 Simply make a copy (or copies) of the FAX sheet and fill in the necessary information. You may FAX us at any time, 24 hours a day, to either of the numbers shown. A Life Fitness service representative will process your order, or respond to your problem, as quickly as possible.
  • Page 66 CUSTOMER SUPPORT SERVICES PARTS ORDER SALE ( IF BOTH PLEASE INDICATE ) PRODUCT TROUBLESHOOTING WARRANTY NAME: CUSTOMER NO: DATE: PHONE: FAX: CONTACT NAME: METHOD OF SHIPMENT: 1 DAY 2 DAY GROUND PARTS ORDER FORM ITEM NO. PART NUMBER DESCRIPTION QUANTITY PRODUCT TROUBLESHOOTING PRODUCT NAME: SERIAL NO.
  • Page 67 Life Fitness T-Series Consumer Treadmills NOTES: Section 5...

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