CATERPILLAR EXCAVATORS:
• Caterpillar 307C/308C/311C/312C/315C 3064/3066 Diesel (2002-2010)
IMPORTANT:
This is an oil pressure SWITCH (on/off) — NOT a variable pressure sensor. It has a single 1-pin connector and provides a simple ground signal when oil pressure drops below 0.3-0.5 bar. Do NOT confuse with 3-pin oil pressure sensors (274-6721, 278-5273, 320-3064) that provide variable 0-5V output to the ECU for gauge reading and engine management. The switch only triggers the warning light — it does NOT feed pressure data to the ECU.
The 3064/3066 engines in Cat 307C-315C excavators are Mitsubishi-built (S4KT/S6KT). Mitsubishi part number MC840-219 cross-references to Cat 266-6210 — same switch. If you see both numbers listed for your machine, they are the same part. Failure symptoms: oil pressure warning light staying on or never illuminating. Before replacing, verify actual oil pressure with a mechanical gauge — a genuine low-pressure condition requires engine service, not just a new switch. Uses 1/8 NPT thread.
⚠️ Confirm 1-pin switch (not 3-pin sensor) matches your application.
Write the First Review!