Maintenance Repairs And Troubleshooting; Annual Maintenance - PRESTON PRESSURE PS-500 User And Maintenance Manual

CHAPTER 5

MAINTENANCE REPAIRS AND TROUBLESHOOTING

Note: Refer to the Theory of Operation section as a reference on how the various systems
function.

Annual Maintenance

The following annual maintenance is recommended:
1. Check color of beads in air reservoir/dryer. Change if pink or clear. The dryer is a
common in-line dryer used in small air compressor systems. A new dryer can be
purchased from Preston Pressure, or an internet search for "mini inline desiccant air
dryer" may lead to an alternate source.
2. Feel fuses to verify tightness. If a fuse feels loose, remove the fuse, squeeze fuse clip
slightly and re-install fuse.
3. Tug on motors to verify motors are mounted tightly. If play is noticed, disconnect
battery and connectors. Remove bottom assembly panel by removing the four screws
holding the bottom assembly. Tighten the motor mount screws and re-assemble.
4. Verify vacuum reservoir tank is mounted tightly.
5. Verify electrical connectors are seated completely.
6. Verify battery holding clamp is tight.
7. Verify switches and valves on front panel are mounted tightly.
8. Test for leaks.
9. Perform calibration checks and re-calibrate if necessary.
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