Overview
The MTS Company CJSU-1 is a fuel sending unit for 1972–1977 Jeep CJ5 and 1972–1975 CJ6 models, and for 1976–1977 Jeep CJ7 models. It is designed to give an accurate reading at the gauge.
The unit includes a locking ring and O-ring, so the seal and retaining hardware for the tank opening come with the sender.
Key features
- Replacement sending unit for CJ5, CJ6 and CJ7 models from 1972 to 1977
- Locking ring and O-ring included
- Trims named include Base, Golden Eagle and Renegade on CJ5 and CJ7
- Part number CJSU-1, UPC 70000026209
Fuel sender care on CJs
Older CJ fuel systems rely on a sender whose float arm sets a resistance that the dash gauge reads. Over time the float can sink, the arm can bend and the contacts can wear unevenly, which makes the gauge swing or sit at one reading. Checking the arm for free movement is a quick first step before removing the unit.
When the sender comes out, inspect the tank opening for debris and check the pick-up area at the bottom of the tank for sediment. Replacing the O-ring and locking ring each time the unit is removed keeps the seal reliable. Clean the mating surface so the new seal sits flat.
Work away from open flames and keep the battery disconnected during fuel work. A fuel smell that persists after reassembly means the seal needs another look before the vehicle is driven. Reconnect the battery only after the connections are dry and tight.
- Check the float arm for free movement
- Inspect the tank for sediment
- Replace the O-ring with the sender
- Clean the seal surface before fitting
Specifications
| Brand | MTS Company |
|---|---|
| Part number | CJSU-1 |
| UPC | 70000026209 |
| Part type | Fuel sending unit |
| Included hardware | Locking ring and O-ring |
| Fitment type | Direct fit |
Vehicle fitment
It fits 1972–1977 Jeep CJ5 (Base, Golden Eagle, Renegade), 1972–1975 Jeep CJ6 (Base) and 1976–1977 Jeep CJ7 (Base, Golden Eagle, Renegade).
The fitment does not include CJ5 or CJ7 models from 1978 onward, or any CJ models from 1971 or earlier. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Keep the included locking ring and O-ring with the unit during fitting. Fuel system work carries fire risk, so work with the battery disconnected.
What’s included
A locking ring and O-ring are included. Check the package contents against your installation for any fuel pump or pick-up tube you need.
