CAT Excavator 6-Pin Harness Connector – TE 776434-1 / 776433-1 | 320D / 330D / 336D

Heavy-duty 6-pin connector from the TE Connectivity 776433/776434 series, designed for Caterpillar excavator harness applications. Cross-references part numbers 776434-1 and 776433-1. Used in hydraulic sensor, engine control, and actuator harnesses on CAT 320D, 330D, and 336D excavators. Available bare or with 15cm pre-wired leads (18AWG).

TE Connectivity 776433 / 776434 Series

Key Specifications

Typical Circuit Applications on CAT Excavators

• Hydraulic pump pressure sensor harness (main pump, pilot pump)
• Engine ECM sensor interface (boost, oil pressure, coolant temp)
• Swing motor and travel motor sensor circuits
• Joystick pilot pressure sensor harness
• Fuel injection actuator harness (C6.4, C7.1 engines)

Compatible Applications

• Caterpillar 320D / 320D2 – Hydraulic and sensor harness
• Caterpillar 330D / 330D2 – Engine and hydraulic control connector
• Caterpillar 336D / 336D2 – Actuator and sensor harness
• Caterpillar 323D / 324D / 325D – Shared TE connector series

Frequently Asked Questions

Q: How do I tell 776434-1 (female) from 776433-1 (male) apart?
A: 776434-1 is the socket-side (female) housing — it receives the pins. 776433-1 is the plug-side (male) housing — it holds the pins. Match to your existing connector gender before ordering.

Q: Are terminals included?
A: Yes, terminals are included with all variants.