Life Fitness 4500HR Service Manual page 29

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Life Fitness Model 4500HR Treadmill

How To ... REMOVE AND REPLACE THE LIFT ACTUATOR ASSEMBLY

Tools Required: Phillips screwdriver, standard screwdriver, hex key wrench set

WARNING: FAILURE TO OBSERVE SAFE 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 VENT COVER. (See "How To...").

Step 3

Remove the MOTOR COVER. (See "How To...").

Step 4

Ground yourself to the machine by positioning an ANTI-STATIC GROUNDING STRAP around your wrist and

attaching the other end (alligator clip) to a MOUNTING SCREW, or a connecting GROUND WIRE SCREW.

Step 5

Unplug the LIFT ACTUATOR (P4), from the CONTROL BOARD ASSEMBLY.

Step 6

Disconnect the large LIFT MOTOR NUT from the pins holding it to the LIFT FRAME ASSEMBLY by removing the

two HAIR PIN CLIPS and PUSH BOLTS.

Step 7

Remove the HAIR PIN CLIP and CLEVIS PIN securing the unthreaded end of the LIFT ACTUATOR to the

FRAME.

Step 8

Remove any WIRE TIES and carefully lift and remove the malfunctioning LIFT ACTUATOR from the machine.

Step 9

NOTE: BE CAREFUL TO ROUTE THE WIRES OF THE LIFT

Position the new LIFT ACTUATOR

ACTUATOR IN A MANNER WHICH WILL AVOID PINCHING OR

ASSEMBLY in place and reverse Steps 1

DAMAGE TO WIRES BY MOVING PARTS. USE WIRE TIES TO

through 7 to return all parts to their proper

INSURE WIRES STAY SAFE AND SECURE AGAINST THE

locations.

FRAME OF THE TREADMILL.

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