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Owner's manual
T5. How to mount it, feed it air, sound it safely and look after it.

Download the manual
- Mounting plate template1 page · print at 100 %
- Service and reassembly guide8 pages · photos of every step
- Quick start and safety card2 pages
Read the safety section of the manual and the Safety notice before you connect air. No pressure rating has been established for the T-Series.
Before you connect air
- Hearing. It is extremely loud. Wear hearing protection to test it, and never sound it near people or animals.
- Its own air. Never tee into a vehicle's air brakes. Use a pressure switch and a tank with a relief valve.
- Bolts. Hand tools only, never a drill or impact gun. Foot: 1/2-13 bolts, SAE flat washers and nylock nuts, never lock washers. Wings, bell pads and foot: finger tight, then a quarter turn more, then stop. Rear caps: black M5 Allen screws on printed washers with nylock nuts, snugged in the star order while you hold the stack centred (on bells 1 and 2 the screw next to the wing goes in from the back). Cracks from over-tightening are not covered by the warranty.
- Heat. Keep it 12 in (30 cm) from the exhaust and anything hot. The plastic softens at about 158 °F (70 °C).
- First run. Fill the tank to about 50 psi only, then step up while you check for leaks and cracks (manual, page 16).
- The law. Check the rules where you install and sound it.
Videos
Nozzle seal, gasket, diaphragm, gasket, rear cap, then six black M5 Allen screws on printed washers with nylock nuts, snugged in the star order while the stack is held centred.
Manifold, wings, then the bells, each on its own 2 mm mount seal. Finger tight plus a quarter turn, hand tools only.
What is in the manual
| Safety | 3 |
| Know your T5 | 5 |
| What's in your horn | 6 |
| Specifications | 7 |
| Hardware and tools | 8 |
| Before you install | 9 |
| Installation guidelines | 10 |
| The air system | 11 |
| Choosing a location | 12 |
| Mounting the horn | 13 |
| Air supply | 14 |
| Valve and wiring | 15 |
| First run | 16 |
| Using and caring for the horn | 17 |
| How the rear stack works | 18 |
| Servicing a rear stack | 19 |
| Bells and mount seals | 21 |
| Troubleshooting | 22 |
| Parts, warranty and support | 23 |
| Build and test record | 24 |
| Drilling template | 25 |
More help
The install guide shows where the horn goes on a semi, a flatbed or a pickup, and how the air gets to it. Gaskets, diaphragms, nozzle sleeves and every other part are in the shop. Stuck? Send a message with a short video of the sound.