JUGS Sports Jr. Baseball & Softball (1 wheel) Pitching Machine - Manual (Page 29)

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Maintenance
Review the following instructions carefully to maintain maximum
accuracy with your JUGS Pitching Machine.
• Maintain tire pressure at 16 to 17 psi (25 psi for tennis balls).
Cleaning
• Keep machine clean, and free of grit and dirt. Always use a clean damp
cloth when cleaning. Never use brake fluids, gasoline, petroleum-based
products, or any solvents to clean machine.
• Periodically, you must clean the tires to help maintain their maximum
performance. A dirty tire can easily be distinguished by either a dark ring
around the tire surface or when the surface itself has turned yellow and has a
very glossy or shiny finish.
• Take medium grade sandpaper (sometimes an even coarser grade is
necessary depending on the amount of soil buildup) and begin to scrub the
tire surface as you would a very dirty frying pan. This process can be very
tedious and could take up to 10 minutes per tire. However, it is necessary
in order to completely clean the rubber of all foreign substances, as well as
prepare it for better machine performance. You should sand the tires when-
ever you notice the soil build-up forming. Always sand tires with the power
switch Off and the machine unplugged.
Once you complete this operation the tire surface will, in most cases, take on
the white color it was originally. Maintaining the tire in this fashion will not only
maximize the performance and accuracy of your machine, but it will extend the
life of the tire.
Storage
• Always store machine and extension cord in separate, clean, dry secured
areas. Cover the machine with a suitable dust cover that does not retain
moisture. Do not use plastic.