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Hydraulic Pump Wiring Harness for Hitachi EX100-2 EX120-2 EX100-3 Excavator
Keep your Hitachi EX100-2 EX120-2 working with the TOPARTS Hydraulic Pump Wiring Harness. It replaces the original harness one-for-one and is built for the vibration, heat and dirt that come with daily work on site.
Its Role in the Machine
The hydraulic pump harness connects the pump controller with the proportional solenoids, pressure sensors and swash plate control on the main pump. It is how the electronics tell the pump how much flow to deliver and how the controller learns what the pump is actually doing.
On electronically controlled hydraulic systems, pump output is constantly adjusted to match engine load and operator demand. All of that adjustment happens through the signals travelling along this harness, so its condition has a direct effect on digging power and fuel economy.
Hitachi ZAXIS and EX series machines combine electronic engine control with electronically managed hydraulics, so both systems depend on sound wiring to deliver their rated performance.
How to Tell It Is Time for a New One
You may notice:
- Work modes having little or no effect on performance
- Higher fuel consumption than normal
- Hydraulic functions feeling slow or weak
- Oil-soaked or heat-damaged wiring around the pump
Intermittent faults like these are classic signs of ageing wiring, and they rarely improve on their own.
Maintenance Advice
Once the new harness is fitted, a quick look during routine services goes a long way. Check for rubbing points, loose clamps and oil contamination, and keep the engine bay and battery area clean so that debris does not build up around the wiring.
Installation Guide
- Relieve hydraulic pressure and let the system cool before working near the pump.
- Wipe oil residue off connectors before unplugging them.
- Check the pump solenoids and pressure sensors for damage while the harness is out.
- Secure the new harness away from hot hydraulic lines with the original clamps.
Made to Last on the Job Site
TOPARTS harnesses are made to the original layout so that every connector reaches its component without strain. Protective conduit and tape guard the wires against abrasion, heat and oil in the engine bay and around the frame.
Confirming Fitment
Model names are not always enough to confirm fitment, because manufacturers sometimes change harness designs within a model's production run. Check the part number on your existing harness, or send us your machine model and serial number, and we will check it for you.
Specifications
- Part Name: Hydraulic Pump Wiring Harness
- Condition: Aftermarket new
- Product Weight: 2 kg / 4.41 lbs
- Brand: TOPARTS
- Feature: Original connector layout; plug-and-play installation
Applicable Models
Hitachi EX100-2 EX120-2 EX100-3
Shipping and Payment
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- Track Your Order: An email containing the tracking number with a link will be sent to you as soon as it ships.
Note: Please verify your part number and match our product pictures to your original item before ordering. If you have any questions, please feel free to contact us. Thanks.
