107-0612 (1070612) Caterpillar (CAT) Oil Pressure Sensor—an analog pressure transmitter—is widely used in classic Caterpillar construction machinery and engines. I. Core Basic Information

Part Number: 107-0612 (1070612)

Type: Oil Pressure Sensor (Analog Output; Non-Switch Type)

Brand: Caterpillar

Function: Real-time monitoring of engine oil pressure; outputs a 0–5V or 0.5–4.5V analog voltage signal to the ECU for engine control, pressure alarms, and protection.

II. Key Specifications

Electrical: 3-Pin Waterproof Connector (Power + Signal + Ground); Compatible with 12V/24V Systems

Measurement Range: 0–10 bar (0–145 PSI)

Output Signal: 0.5–4.5V (Corresponding to 0–10 bar)

Thread Specification: M14×1.5 or 7/16"-20 UNF (Common Standard)

Material: Stainless Steel / Brass Body; Oil-Resistant and High-Temperature-Resistant Sealing

Operating Temperature: -40°C to +125°C

III. Main Compatible Models (Engines / Equipment)

Engine Series

3116, 3126, 3126B, 3126E

3306, 3406, 3406B, 3406C, 3408, 3408C, 3412, 3412C

C7, C9, C10, C12, C15, C18, etc.

Construction Machinery / Equipment

Excavators: 320B, 322B, 325B, 330B, 320C, 325C, 330C, 345C, etc.

Wheel Loaders: 950G, 962G, 980G, 988G, etc.

Dozers, Motor Graders, Road Rollers, Generator Sets

IV. Alternative / Interchangeable Models

107-0613 (Same series; similar specifications) 161-1704, 161-1705 (Interchangeable for select models)

224-4536, 238-0118, 239-2396 (Common replacement part numbers for domestic OEM applications)

VI. Common Faults and Replacement Guidelines

Fault Symptoms

Abnormal oil pressure readings; warning light illuminates erroneously or fails to light up

ECU reports oil pressure sensor fault codes (e.g., P0520, P0521, P0522, P0523)

Unstable engine idle, loss of power, or abnormal engine shutdown

Replacement Guidelines

Perform removal and installation only after the engine has cooled down and the system pressure has been relieved

Clean the threads thoroughly and apply high-temperature sealant or thread locker

Tighten to the specified torque (approx. 25–35 N·m) to prevent stripping the threads

After installation, perform a test run to check for leaks and verify that the pressure display is functioning normally