Buy A3111Y4757 - Genuine Meritor Steering Knuckle - wisentpartscenter.com

Description

Meritor A3111Y4757 Steering Knuckle - Genuine Meritor LH Front Steer Knuckle

The Meritor A3111Y4757 is a genuine left hand steering knuckle for a Meritor front steer axle. It carries the spindle the wheel hub rides on, pivots on the kingpin in the axle beam, and holds the tie rod and steering arm. Left hand side.

Key Functions:

- Carries the spindle and wheel hub
- Pivots on the kingpin to steer the wheel
- Mounts the tie rod and steering arm

Fitment & Specifications:

- Meritor front steer axle
- Left hand (LH)

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

Purpose of the Part

The knuckle is what the wheel steers on. It rides on the kingpin in the axle beam and the tie rod and drag link turn it, while the spindle carries the hub, bearings and brake. Because it holds the front wheel and takes steering, braking and road loads, a cracked or worn knuckle is a safety issue.

Issue Symptoms / When to Replace

Wander or play in the steering, uneven tire wear, a worn or scored spindle, worn kingpin bores, and any cracks. Impact damage from a curb or pothole is a common reason to replace one. Kingpin bore wear shows up as slop that a kingpin kit alone will not fix.

Brand Information

Meritor is the leading heavy truck axle manufacturer and builds this knuckle to the axle's kingpin, spindle and steering geometry. On a forged steering part that carries the front wheel and takes braking and steering loads, the material and machining are what matter, which is why a genuine knuckle is worth it over an unknown copy on a safety part.

Installation Notes

Replace the kingpins, bushings, seals and thrust bearing when installing the knuckle, do not reuse old ones. Ream the bushings to spec for kingpin fit, set the correct thrust bearing preload, and torque the tie rod and drag link to Meritor spec.

How to Identify an OEM Part

A genuine unit has the Meritor part number and forging marks on the casting. Check the number matches your order and confirm it is the correct hand (LH vs RH) and the spindle, kingpin bore and arm layout match the knuckle coming off.

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.