Stairmaster 4400 PT/CL, 4600 PT/CL, 4200 PT manual Lubrication, Maintenance Instructions, Page

MAINTENANCE INSTRUCTIONS

2.Inspect the Poly-V belt and HTD belts for excessive wear during the quarterly lubrication. Adjust the belt tension if necessary.

Lubrication

There are nine components that need periodic lubrication: the drive chain, the step chains, the pedal arm return springs, the step chain connection points, the pedal arm bushings, the leveling arm bushings, the spring pulley shafts, the pedal shafts and the leveling arm pins. These parts are shown in Figure 11, page 74. Remove the bottom cover to get to the components. If you have a 4600 PT/CL you will also need to remove the upper covers.

1.Place a protective mat on the floor while you lubricate your machine. A rubber floor mat is available from StairMaster® Health & Fitness Products, Inc.

2.Lubricate the drive chain and the step chains weekly. Try to penetrate the entire length of the chains with 30W motor oil.

3.Remove the drive chain and step chains every three months to thoroughly clean and lubricate them. Use a mild degreaser and a stiff brush to remove dirt and corrosion from the chains.

4.Unhook the pedal arm return springs from the spring hanger every week. To protect them from corrosion, wipe the entire length of each pedal arm return spring with a cloth dampened with 30W motor oil before reconnecting it. Replace the spring if it is rusty or otherwise damaged.

5.Remove the double pitch master link from the step chain connection points every three months. Clean the master link and the bushing in the pedal arm. Lubricate the master link and bushing with a thin coat of multi-purpose grease before reassembling.

6.Remove the pedal arms and leveling arms every three months. Clean the pedal arm and leveling arm shafts and bushings with a clean cloth. Protect the shafts from corrosion by wiping them with a cloth dampened with 30W motor oil.

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