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177348141121-0 - Northline Parts

John Deere LT and LTR Seat Suspension Springs M128761 2-Pack

SKU: NLT1U00196
$22.99 In Stock
$22.99
Sale price  $22.99 Regular price 
Ships for free in 2–4 business days.
This new aftermarket seat suspension compression springs is intended for the compatible models and reference numbers shown below. It cross-references M128761.
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Compatible Models

We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.

Compatible equipment / model
  • John Deere LT133
  • John Deere LT150
  • John Deere LT155
  • John Deere LT160
  • John Deere LT166
  • John Deere LT170
  • John Deere LT180
  • John Deere LT190
  • John Deere LTR155
  • John Deere LTR166
  • John Deere LTR180

Product Overview

If the seat bottoms out, sits crooked, or pounds the operator over every bump, tired or missing support springs may be the simple cause rather than the seat pan itself.

This pair of compression springs replaces M128761 beneath compatible John Deere LT and LTR seats. Each spring is approximately 83.12 mm free length with a 35.3 mm outside diameter; compare the mounting pockets and old spring size.

Key Features & Performance

  • Two seat-support springs
  • Restores suspension height and cushioning
  • 19.1 N/mm published spring rate
  • Closed square-end compression design
  • New aftermarket pair

Replaces Part Numbers

  • M128761

Common Uses

  • Replacing collapsed seat springs
  • Correcting an uneven seat
  • Refreshing operator comfort during mower service
  • Replacing rusted or missing supports

Technical Specifications

  • Product Type: Seat suspension compression spring
  • Quantity: 2
  • Free Length: 83.12 mm
  • Outside Diameter: 35.3 mm
  • Wire Diameter: 4.318 mm

Installation & Fitment

  • Remove the key and park on level ground
  • Support the seat before releasing spring tension
  • Clean and inspect both spring pockets
  • Replace springs as a pair for even support
  • Confirm the seat switch and hinges still operate correctly

Compatibility Notice

Northline Parts does its best to list all known compatible models, but the correct part may fit an application not shown.

Model, production date, serial number, dimensions, electrical or mounting configuration, installed options, and previous repairs can affect fitment. Compare the removed part and equipment information before purchase.

Frequently Asked Questions

Q: Why replace both springs? A: A matched pair helps keep the seat level and avoids combining one fatigued spring with one new spring.

Q: Can these fix a cracked seat pan? A: No. Inspect the pan, hinge, brackets, and suspension hardware separately.

Q: How do I confirm fitment before ordering? A: Match the original reference number, equipment model and serial number, dimensions, connector or mounting details, and the product photos. Do not rely on appearance alone.

Q: Is this made by the original equipment manufacturer? A: No. This is a new aftermarket part. Brand names and model numbers are used only to identify compatible equipment.

Part Summary

keywords: John Deere M128761 seat spring, LT150 seat suspension springs, LT155 seat spring pair, LT180 mower seat support, LTR seat compression spring

Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.

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