Description
PAI 350602 is an aftermarket multi-function temperature sensor that replaces Caterpillar OEM 197-8391, 234-4297, 2644297, and 1309811 on Cat 3100 series, C7, and 3126B engines. Two-pin rectangular Deutsch-style connector, 3/4-16 UNF thread, and 3.04 in overall length, supplied with PAI 321230 O-ring (equivalent to OEM 2385080).
Specifications
| Manufacturer | PAI Industries |
|---|---|
| Part Number | 350602 |
| Part Type | Temperature Sensor (oil/coolant) |
| Connector | 2-pin rectangular |
| Thread | 3/4-16 UNF |
| Overall Length | 3.04 in (77.2 mm) |
| Engine Compatibility | Cat 3100 series, C7, 3126B |
| Included Hardware | PAI 321230 O-ring (OEM 2385080) |
Cross References
This temperature sensor replaces or is equivalent to the following part numbers:
- Caterpillar: 197-8391, 1978391, 234-4297, 2644297, 1309811
- PAI Industries: 350602
- Caterpillar O-ring: 2385080 (PAI 321230)
Applications
This sensor fits the following Caterpillar engines:
- Cat 3126 / 3126B 7.2L (mid-1990s — 2003 on-highway truck applications)
- Cat C7 7.2L (2004+ on-highway and industrial)
- Cat 3100 series mid-bore engines sharing the 197-8391 sensor port
Representative vehicles using these engines:
- International 4300/4400 medium-duty (Cat C7) (2004–2009)
- Freightliner Business Class M2 / FL70 with Cat 3126B / C7 (1998–2009)
- School and transit bus chassis powered by Cat 3126B / C7
Verify your engine serial number, sensor port (oil rail vs coolant gallery), and mating connector keying before ordering. The 3/4-16 UNF thread and 2-pin rectangular connector must match the OEM port to install without adapters.
