English 
350-8198 Solenoid Wiring Harness for Caterpillar CAT Excavator E374D 374D
If diagnosis has led you to the wiring, the 350-8198 Solenoid Wiring Harness gives you a complete, new harness for Caterpillar E374D, 374D excavators instead of a patchwork of repairs on old, brittle wire.
Why This Harness Matters
Each solenoid on the control valve depends on a sound electrical connection. Cracked or corroded plugs are a common cause of slow functions, travel problems and intermittent hydraulic faults.
Solenoid valves turn electrical commands into hydraulic movement. The plugs and wiring on these valves have to stay tight and dry, or the valve may respond late, weakly or not at all.
Caterpillar machines rely heavily on electronic engine and machine control, which makes healthy wiring essential for performance and fault-free operation.
Questions Buyers Often Ask
Is this harness plug-and-play?
Yes. It is built to the original layout with matching connectors, so it installs in place of the original without cutting or splicing.
How do I know it will fit my machine?
Match the part number on your old harness, or send us your machine model and serial number and we will confirm before you order.
How long does shipping take?
Orders are shipped by express courier such as DHL, FedEx, UPS or TNT, and you will receive a tracking number by email as soon as your parcel leaves our warehouse.
Common Symptoms of a Failing Harness
Watch for these symptoms:
- Cracked plug housings or loose terminals on valve solenoids
- Solenoid fault codes
- Hydraulic functions responding slowly or not at all
When diagnostics point to a circuit fault rather than a failed component, replacing the wiring is often the most cost-effective repair.
What You Get with TOPARTS
We check connector fit, wire continuity and overall layout before shipping, so the harness you receive is ready to install. The materials are chosen for the temperature range, vibration and contamination found on construction equipment.
Installation Guide
- Release hydraulic pressure before working on the valve.
- Match each plug to its solenoid position.
- Seal new joints properly against water and oil.
Why a New Harness Beats Patching
Patching wiring takes time: tracing the fault, cutting, crimping and sealing, often in an awkward position. When the insulation is hardened along the whole length, that time is better spent fitting a new harness that solves every weak spot at once.
Product Details
- Part Name: Solenoid Wiring Harness
- Part Number: 350-8198, 3508198
- Condition: Aftermarket new
- Product Weight: 3 kg / 6.61 lbs
- Brand: TOPARTS
- Feature: Quality checked before shipping; built for heavy-duty use
Fits the Following Machines
Caterpillar CAT Excavator E374D 374D
Payment & Shipping
- 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.
