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CLEAN THE BATTERY
Clean the battery by removing it from the unit and washing with a baking soda and water solution. If necessary,
scrape the battery terminals with a wire brush to remove deposits. Coat terminals and exposed wiring with grease
or petroleum jelly to prevent corrosion.
BATTERY STORAGE
The battery loses some of its charge each day when the unit is not used. Never store battery without a full
charge. Recharge battery before returning to service or every two months, whichever occurs first. When storing
unit for extended periods, disconnect battery cables. Removing battery from unit is recommended.
TIRES
The two front wheels are caster wheels that are free to swivel to accommodate the direction of the Z-series. The
tires on the caster wheels are made of solid polyurethane that do not require air.
The two rear wheels are used to propel the Z-series in the direction of input from the drive handles. Inflation
pressure of the rear tires is important for stability while the Z-series is in operation. If the tire diameter is not equal
between the two tires, the Z-series will pull to one side.
Use the following guidelines for maintaining the tires:
• Balance inflation pressure between the rear tires to help maintain straight travel (see tire side wall for
proper inflation pressure).
• Keep the valve caps in place and tightened to prevent air pressure loss.