Life Fitness Lifecycle 5500HR, Service Manual, Page: 24 / 47

6
Life Fitness Model 5500HR Treadmill
How To... REMOVE AND REPLACE THE DRIVE MOTOR ASSEMBLY
Tools Required: Phillips Screwdriver, Socket Set
WARNING: FAILURE TO OBSERVE SAFETY PROCEDURES WHEN SERVICING THIS UNIT
COULD RESULT IN INJURY FROM ELECTRICAL SHOCK
Step 1
Turn the power OFF at the ON/OFF switch and then unplug the unit from the electrical outlet.
Step 2
Remove the MOTOR COVER (See “How To...”).
Step 3
With the power to the machine OFF , hold the handrails and walk on the treadmill until the STRIDING BELT completes at
least one revolution around the rollers (this will aid in releasing any electrical charge which may be held in the
CAPACITOR). Remove the CAPACITOR CAP and
use a DC Voltmeter to check and insure that the CAPACITOR
does not hold a charge prior to proceeding to Step 4.
Step 4
Ground yourself to the machine by positioning an ANTI-STATIC GROUNDING STRAP around your wrist and attaching the
other end to a MOUNTING SCREW or a connecting GROUND WIRE SCREW.
Step 5
Using a Phillips screwdriver, loosen and remove the two SCREWS securing the FRONT PANEL.
HELPFUL HINT: MARK OR SCORE THE PLACEMENT OF THE DRIVE MOTOR MOUNTING BRACKET.
THIS WILL HELP WHEN RE-TENSIONING THE DRIVE MOTOR BELT.
Step 6
With a socket wrench (1/2”), loosen the four
NUTS and WASHERS securing the DRIVE
MOTOR ASSEMBLY to the MOTOR PAN.
Step 7
With a socket wrench (7/16”), loosen and remove
the TENSIONING BOLT from
the DRIVE
MOTOR ASSEMBLY MOUNTING BRACKET.
NOTE: TAKE A MOMENT TO NOTE THE
LOCATIONS OF THE DRIVE MOTOR
ASSEMBLY WIRE CONNECTORS PRIOR TO
DISCONNECTING THEM FROM THE DRIVE
MOTOR ASSEMBLY.
Step 8
Push the DRIVE MOTOR ASSEMBLY towards
the
FRONT ROLLER to relieve the tension on the
DRIVE MOTOR BELT. Roll the DRIVE MOTOR
BELT off the DRIVE MOTOR PULLEY
ASSEMBLY.
Step 9
Disconnect the OPTO-SENSOR (P2) from the
HEATSINK CONTROL BOARD. Cut all
necessary wire ties.
Step 10
Remove the POSITIVE (A1+), NEGATIVE (A2),
CASE GROUND WIRES (green wire to motor
case and a grounding wire to MOTOR PAN) from
their respective locations.
Step 11
Remove the four NUTS and WASHERS securing the DRIVE MOTOR ASSEMBLY to the MOTOR PAN. Carefully lift and
remove the malfunctioning DRIVE MOTOR ASSEMBLY from the machine.
Step 12
Position the new DRIVE MOTOR ASSEMBLY in place and reverse steps 1 through 9 to return all parts to their proper
locations. Replace all wire ties.