Inspect Pulleys; Inspect Weight Stack And Selector Pin - Precor Discovery Series Selectorized Line Owner's Manual

Inspect Cables, Connections, and Tension
Each week, give the cables and connections a thorough inspection and check
cable tensions. The following lists the specific things you need to inspect:
 Check the cable termination at the weight stack. Make sure that the cable
bolt is threaded at least a minimum of seven turns into the selector stem
or a minimum of ¹ ₂-inch (13 mm), so that there is no more than ³ ₄-inches
(19 mm) between the top of the jam nut and base of the bolt head. Check
and adjust accordingly. Also make sure that the locking jam nut is tight
against the selector stem.
 Check the cable, especially near the pulleys, wheels, and cams.
 Check the cable as it terminates at the cam, which is stationary on most
equipment. Inspect the bolt passing through the cam end fitting to be sure
the two jam nuts are tightened against each other. Also, check the entire
cable routing to verify that there is no interference with any structure.
 Inspect the ball end of the cable where the cable connection rests in the
clevis housing.

Make sure that each cable is properly adjusted and tightened at the top of
the weight stack.
 Check cable pulleys, end connections, and end fittings. Make sure all
connections are tight, adjusting cable tension as necessary.
Discovery Selectorized Line Owner's Manual: Maintenance

Inspect Pulleys

Precor uses precision ball bearing idler pulleys to guide the cable smoothly.
Inspect each pulley for damage, including hairline cracks, chips, or missing
sections. Worn surfaces in the pulleys can cause severe damage to the cables
and must be replaced at the first sign of wear or damage.
Be certain that the wheels turn freely as the equipment is used. Inspect each
pulley for excessive side-to-side play, which indicates worn bearings or loose
mounting bolts. If excessive play is discovered, remove the pulley to inspect
the bearings and replace the entire pulley if necessary.

Inspect Weight Stack and Selector Pin

Weight stacks are made of precision machined plates that are designed as a
single mechanism to stack precisely. Use only Precor-supplied add-on weights
and weight selector pins.
On a weekly basis, inspect weight stacks and selector pins. Wipe each plate
with a damp cloth as needed. Inspect all plates for sharp burrs or damage.
Wipe dirt and dust off the guide rods.
Make sure the equipment uses only the original Precor selector pin. In
addition, make sure the selector pin can be fully inserted and retained in each
weight plate.
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