The patented design of the Cat’s Eye TPMS allows drivers and fleet maintenance managers to quickly and easily see if there is a potential safety hazard from underinflated tires. The bright yellow “eye” opens up slightly if dual tire pressure falls below the recommended pressure setting. When the eye is completely open, the pressure has dropped significantly and needs immediate attention.

The single airing point of Cat’s Eye TPMS fills both tires at once and allows air transfer from one tire to the other, equalizing the pressure in both tires. An internal check valve provides added safety by preventing both tires from going flat in the event of a leak, a blow out or when one of the pressure hoses is cut or broken. With just a glance, you’ll instantly see any unsafe change in tire pressure.




Air Leaks


Bubble test


1. Bubble test to locate leak
2. If leak is located at one of the hose fittings: First remove the fitting and inspect the tire stem for damage or debris. Repair or replace as necessary. Inspect the seal material (inside fitting) for damage. Replace seal or hose if needed.
3. If the leak is located at the base of the gauge, remove the hose or air inlet valve and apply thread sealant liberally to the threads and replace
4. If leak is located at one of the hose crimps, return the hose to Link for repair or replacement.
5. If the leak is located at the Cat’s Eye central airing point, replace the valve core or order a replacement air inlet valve.

“Eye” does not close when tires are at correct pressure

Check Pressure with Gauge

1. Check to see that the Cat’s Eye gauge is the correct pressure rating for your application
2. Remove the fitting from the tire stems and check the air pressure in each tire.
3. Inspect both tire stems by depressing the valve core to ensure that there is no air blockage.
4. Inspect tire stem threads for imperfections. Repair the threads with thread repair tool.

“Eye” does not open when tires have lost pressure

Depress the valve core at the central airing point and check for “eye” movement or remove the hose end fitting from the outside tire.

1. Check to see that the Cat’s Eye gauge is the correct pressure rating for your application
2. If the “eye” does not open when one of the hose ends has been removed from the tire stem, call Link to determine the method of repair or replacement.

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