Case 2166 and 2188 Combines Yiled Monitor Installation Instructions

These 2166 and 2188 combines spend their lives in dusty fields, running long days at harvest, and the yield monitor is what tells you if the machine is actually doing the job you think it is. This installation manual helps you mount, route, and hook up the yield monitor and cab wiring correctly so the system reads accurately and stays reliable. I’d pull this out when a monitor was added to a machine that never had one, or when someone’s been “rewiring” and the readings jump around or drop out whenever you hit a bump.

Applications & Use Cases

• Install a new yield monitor on a 2166 or 2188 without guessing cable runs or bracket locations.
• Trace and verify cab and sensor wiring when the monitor powers up but won’t read flow or moisture.
• Confirm connector orientation and routing after cab repairs or interior panel work.
• Isolate a bad harness or loose plug before ordering expensive electronic parts.
• Check proper grounding and power feeds if the display flickers or resets in the field.

FAQ

Q: Can I keep this manual on a tablet in the cab?

A: Yes, it’s handy to zoom in on diagrams and follow steps right where you’re working.

Q: Is it worth printing sections of this manual?

A: Printing the wiring and routing pages is useful so you can mark notes and keep them with the machine file.

Safety Note

Always disconnect power and secure the combine before routing or tying in any yield monitor wiring.

Case 2166 and 2188 Combines Yiled Monitor Index:

GENERAL INFORMATION, 2
Description of System Components, 2
Yield Monitor, 2
Cab Cable/Yield Monitor Cable and Distribution Cable, 2
Grain Flow Sensor, 2
Elevator Adjuster, 2
Radar (If Equipped), 2
Moisture Sensor, 2
Header Height Sensor, 2
Elevator Speed and Ground Speed Cable, 2
Helpful Tips On Installing the System, 3
Safety, 3
Standard Torques, 4

YIELD MONITOR AND CAB CABLE INSTALLATION, 6
Distribution Cable Installation, 12

HEADER HEIGHT SENSOR INSTALLATION, 14

ELEVATOR SPEED AND GROUND SPEED CONNECTION, 17
Radar Installation (If Equipped), 18

MOISTURE SENSOR INSTALLATION, 19
2188 Inclined Delivery Auger Installation, 20
Removing the Moisture Sensor for Cleaning, 24
2166 Horizontal Auger Installation, 25

GRAIN FLOW SENSOR INSTALLATION, 28
1995 Model 2188s and All 2166 Combines, 29
1996 and Later 2188 Combines, 30
All Combines, 30

ELEVATOR ADJUSTER INSTALLATION, 35

INITIAL SYSTEM START-UP, 37

CNH