Buy 229-8842 - Genuine CAT Fuel Injector - wisentpartscenter.com

Description

CAT 10R-9000 Fuel Injector - Genuine Caterpillar HEUI Fuel Injector for 3126B Engines

The CAT 10R-9000 is a genuine HEUI (hydraulically actuated, electronically controlled) unit injector for the Caterpillar 3126B. It meters and injects fuel on ECM command. Available new (229-8842) or as a CAT Reman unit (10R-9000).

Key Functions:

- Meters and injects fuel into the 3126B under ECM control
- HEUI-type unit injector

Fitment & Specifications:

- Application: CAT 3126B (confirm by engine serial number)
- Type: HEUI unit injector

Verify fitment with us before ordering to ensure the correct part for your application.

Purpose of the Part

It's the injector for the 3126B - it delivers the fuel charge to the cylinder, timed and metered by the ECM. A worn or failed one shows up as rough running, low power, or misfire on that cylinder.

Issue Symptoms / When to Replace

- Rough idle, misfire, or a dead cylinder
- Low power, hard starting
- Excess smoke or high fuel consumption
- Injector-related codes / injection actuation pressure faults on the 3126B

Diagnose with CAT ET before condemning an injector - the 3126B HEUI system can throw actuation-pressure faults from the pump or IAP sensor, not just the injectors.

Installation Notes

Many 3126B injectors carry an E-trim/injector code that gets entered into the ECM with CAT ET after install. Whether it's required varies by engine serial number - some builds need it, some don't - so check the procedure for your ESN. Skipping a required code can cause low/high power, rough idle, or emissions faults.

How to Identify an OEM Part

Genuine CAT injectors carry the CAT part number marked on the body, plus an individual E-trim code stamped on the top or side.

Why buy from Wisent Parts
  • ⏱️
    Fast shipping
    Orders before 12PM EST ship same business day.
  • 🛡️
    180-day warranty
    All parts covered from delivery date.
  • ↩️
    Easy returns
    30-day returns.
  • ✅
    Verify fitment
    Send VIN/ESN and we’ll confirm.

Shop with confidence

Warranty & Return Information
Warranty Information

Wisent Parts offers a 180-day warranty on all parts from the date of delivery. This warranty covers orders placed directly through our website. If a part fails during this period, we’re here to help - whether it’s a replacement, repair, or refund. For full details, refer to the Warranty page.

Return Information

Wisent Parts accepts returns within 30 days of delivery. All returns are subject to a restocking fee. To qualify, parts must be unused and in their original condition. For full return instructions and restocking fee details, please refer to the Returns page.