Drive Belt Slipping; Upper Arms Loose; Play In Pedal Lever; No Load - Life Fitness 8500 Service Manual

Life Fitness Model 8500, 9100, and 9500HR Cross-Trainers
Malfunction
Grinding, rubbing, knocking noises
when pedal levers rotate under
load.

Drive Belt slipping.

Upper Arms feel loose.
Front to back play in pedal lever.

No Load.

No LEDs on display.

4
Probable Cause
Excessive end play in rocker arms.
Pedal lever vibrates or squeaks during
operation.
Pedal tape not adhering properly.
Loose or worn belt.
Bolts that connect the upper and
lower arms are loose.
Worn bearings.
Poly V-Pulley on intermediate shaft is
loose.
Crankarm loose.
Worn link bearings.
Loose link mounting.
Faulty cables, power console board,
or alternator.
Faulty display console.
Corrective Action
Adjust collars as necessary to take
out the end play. See How To
Replace Rocker Arms.
Align pedal lever. See How To
Replace Pedal Lever.
See How To Replace Pedal Lever
Check belt tension using a J10 belt
gauge. The belt deflection should be
1/4' (7mm) at 170 lb for a new belt
and 160 lb for an existing belt.
Adjust and tighten to a torque of 30-
35 ft lb.
Check for front to back movement in
bearings that connect pedal lever to
the rocker arm. Replace pedal lever
assembly.
Replace intermediate shaft
assembly.
Loosen setscrews and clamping
screw in Crankarm Assembly. Apply
®
blue Loctite 242 on screws. Tighten
setscrews first and then tighten the
clamping screw.
Replace link.
Clean, lube, and reassemble.
Enter diagnostic state 3 and execute
the field duty cycle and increase the
load. If load does not increase,
replace alternator.
Using a voltmeter, verify 8Vdc at the
10 position Molex connector pin 1 on
the display console PCB. If voltage
is present, replace display console.
If not, replace power control board.