Mechanical Troubleshooting - Stairmaster Crossrobics 1650 LE Owner's Manual

MECHANICAL TROUBLESHOOTING

If you hear a grinding or clicking noise, or experience excessive vibration
during exercise, a problem exists in the drive train of your machine. Isolate the
problem area by performing the following steps in the order listed below. Refer
to the appropriate "Parts Removal and Replacement" section of this manual
for all disassembly and assembly instructions.
1. Ensure the weight stack guide rods are properly lubricated. Refer to
the general maintenance section for instructions.
2. Remove the seat, seat tray, left side cover and right rear cover.
3. Remove the alternator Poly-V belt and inspect the belt for cracks and/
or fraying. Replace the belt if it is worn.
4. Spin the alternator pulley. The pulley should spin freely four to
five revolutions without any clicking or grinding noises. Replace
the alternator if any noises are heard.
5. Remove the HTD belt and inspect the belt for cracks and/or
fraying. Replace the belt if it is worn (see Figure 8).
6. Spin the 8-inch Poly-V pulley on the pivot adjustment assembly (see
Figure 8). The pulley should spin freely without any clicking or
grinding. Replace the pivot adjustment assembly if any noises are
heard.
7. Rotate the HTD pulley of the lower reduction shaft assembly by hand
(see Figures 8 and 24). The pulley should rotate freely without any
clicking or grinding. Remove the drive chain, then disassemble and
inspect the lower reduction shaft assembly if any noises are heard
(see Figure 24).
8. Remove the step chains and inspect the chains for frozen links. Flex
each link up and down, each link should move freely. Replace a chain
if any frozen links are found. Do not reinstall the chains.
9. Rotate the clutch sprockets (see Figure 17). Each sprocket should lock
in one direction and rotate freely in the reverse direction. Inspect the
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