Sealey SA371 and SA372 Tyre Inflator User Guide

Quick guide from the manual

This document provides operating and maintenance instructions for Sealey tyre inflator models SA371 and SA372. These devices are designed for measuring and adjusting tyre pressure in motor vehicles. Always ensure the air supply is disconnected before performing any maintenance or changing accessories.

Operation

To read pressure: Place the chuck squarely and firmly onto the tyre valve. Fully depress the lever and release it to get a reading.

To inflate: Place the chuck squarely and firmly onto the valve. Fully depress the lever for an appropriate period, then release it to display the current pressure. Repeat this process until the desired pressure is achieved.

To deflate: Depress the lever halfway until air can be heard escaping. Hold for an appropriate period, then fully depress the lever momentarily and release it to display the new pressure. Repeat until the correct pressure level is reached.

Maintenance

Regular maintenance is required for long service life and accuracy:

• Weekly: Check for correct operation, smooth lever movement, and fast gauge response. Inspect tyre connector seals and flexible hoses for leaks, chafing, or wear. Remove from service if damaged.
• Monthly: Remove the oil screw and place 2-3 drops of light oil into the gauge mechanism.

Troubleshooting

If you encounter issues, consider the following:

• Air leaks from connector: Replace seals if an airtight seal is difficult to obtain.
• Damaged hose: Replace the complete hose assembly immediately if deep chafing or cracking appears.
• Erratic readings or stiff lever: Try oiling the valve mechanism. If this does not resolve the issue, the valve assembly may need replacement.
• Slow inflation: Check for low supply pressure, a blocked inlet filter, or a damaged valve mechanism.
• Gauge does not return to zero: This indicates a stiff or damaged gauge mechanism. The unit must be returned to an authorised repair centre for recalibration.

Safety

Do not direct the outlet at yourself, others, or animals. Do not carry the inflator by the hose or tug it from the air supply. Avoid operating near strong magnetic fields, corrosive gases, or liquids. Do not drop or bump the unit, and keep it dry.