GY21127 Rear PTO Clutch Wire Harness Fits John Deere L120/130 LA130/140 GY20166
GY21127 Rear PTO Clutch Wire Harness Fits John Deere L120/130 LA130/140 GY20166
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Rear PTO Clutch Wire Harness for John Deere
Rear PTO clutch wire harness for John Deere L120, L130, LA130, and LA140 tractors replaces OEM numbers GY21127 and GY20166.
Overview
The rear PTO clutch wire harness delivers reliable electrical connection from the mower’s ignition switch to the electric PTO clutch on John Deere 100 Series lawn tractors. Constructed with weather-resistant insulation and factory-correct connectors, this harness prevents intermittent clutch engagement and protects wiring from heat and vibration. Equipment owners and small engine mechanics use this direct-fit harness to restore consistent blade engagement without splicing or modifying the tractor’s electrical system.
Built For Performance
- Plug-and-play connectors match the PTO clutch and chassis interface
- OEM-grade cross-linked polyethylene insulation resists oil and engine heat
- Tinned copper terminals fight corrosion from moisture and grass debris
- Pre-formed routing keeps the harness clear of the mower deck belt
- Integrated locking tab secures the connector to the clutch coil
- Direct replacement for John Deere part numbers GY21127 and GY20166
Fits These Machines
- for John Deere L120
- for John Deere L130
- for John Deere LA130
- for John Deere LA140
On-The-Job Use
- Replacing a damaged harness when the PTO clutch fails to engage
- Restoring power to the electric clutch after wiring shorts or rodent damage
- Testing the PTO circuit during tractor diagnostics
- Installing a new electric clutch on a John Deere 100 Series mower
Specs At A Glance
| Part Number(s) | GY21127, replaces GY20166 |
| Length | Approximately 18 inches |
| Connector Type | 2-pin weatherpack style |
| Wire Gauge | 12 AWG |
Good To Know
Q: Can a bad PTO wire harness cause the blades not to engage? A: Yes, a broken wire, corroded terminal, or loose connector can interrupt power to the electric clutch, preventing blade engagement even if the clutch itself is functional.
Q: How do I install this rear PTO harness on my John Deere tractor? A: Disconnect the battery, unplug the old harness from the clutch and chassis, route the new harness along the original path avoiding the belt, and snap the connectors into place.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.
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