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197-4328 Hydraulic Pump Wiring Harness for Caterpillar Excavator E325C 322C
Keep your Caterpillar E325C 322C working with the TOPARTS 197-4328 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.
What This Harness Does
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.
Caterpillar machines rely heavily on electronic engine and machine control, which makes healthy wiring essential for performance and fault-free operation.
Confirming Fitment
Before ordering, compare the part number printed on the label of your original harness with 197-4328. It is also worth comparing the connector shapes and the number of branches with our product photos. If your machine's serial range or engine variant differs, send us your machine details and we will confirm compatibility before you buy.
Made to Last on the Job Site
The goal is simple: a harness that fits like the original and keeps working like it. Matching connectors, correct branch lengths and durable insulation mean stable performance and high reliability in daily heavy-duty use.
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.
Warning Signs to Watch For
Watch for these symptoms:
- Pump or solenoid fault codes on the monitor
- Hydraulic functions feeling slow or weak
- Oil-soaked or heat-damaged wiring around the pump
- Engine bogging down or stalling under heavy hydraulic load
- Work modes having little or no effect on performance
If these symptoms persist after checking fuses, batteries and grounds, the wiring itself is the next thing to suspect.
Installation Tips
- 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.
Specs at a Glance
- Part Name: Hydraulic Pump Wiring Harness
- Part Number: 197-4328, 1974328
- Condition: Aftermarket new
- Product Weight: 3 kg / 6.61 lbs
- Brand: TOPARTS
- Feature: Matches original routing and length; durable, heat-resistant insulation
Application
Caterpillar Excavator E325C 322C
Shipping and Payment
- Payment Method: PayPal, Stripe, Credit card, Visa, etc.
- Shipping Method: DHL, FedEx, UPS, TNT, USPS EMS, etc.
- 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.
