LCN 4003T-3071 Cast Iron Cylin...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$511.00
$368.71
LCN 4003T-3071 Standard Cylinder Assembly

LCN 4003T-3071 Cast Iron Cylinder Assembly - Standard Handed Configuration

(No reviews yet) Write a Review

Model: 4003T-3071 689
Selected Finish is

In Stock (leaves warehouse same day if ordered before 3pm ET)

$511.00
$368.71
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

LCN 4000T Series Cast Iron Cylinder Assembly - Standard Handed Configuration

Professional Replacement Cylinder Component

The LCN 4000T Series Cast Iron Cylinder Assembly provides reliable replacement functionality for commercial door control systems. This standard handed cylinder assembly features cast iron construction for durability in demanding commercial applications and maintains ADA compliance for accessibility requirements.

Professional Features & Benefits

  • Cast Iron Construction: Durable cast iron material provides long-lasting performance in high-traffic commercial environments.
  • Standard Handed Configuration: Pre-configured for standard door applications with proper handing for consistent operation.
  • 4000T Series Compatibility: Designed specifically for integration with LCN 4000T Series door control systems for reliable replacement service.
  • ADA Compliance: Meets ADA accessibility requirements for commercial door hardware applications.
  • Commercial-Grade Design: Engineered for demanding commercial applications where dependable cylinder operation is essential.
  • Replacement Part Availability: Provides cost-effective maintenance solution for existing LCN door control installations.

Technical Specifications

  • ADA Compliant: Yes
  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Parts and Accessories Type: Replacement Parts
  • Product Attribute: Parts and Accessories
  • Product Category: Door Controls
  • Product Group: Door Controls
  • Product Model: 4003T-3071
  • Product Subgroup: Parts and Accessories
  • Product Type: Cylinders
  • Series: 4000T Series
  • Subcategory: Parts and Accessories

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Choose LCN Quality?

LCN cylinder assemblies deliver professional-grade reliability with cast iron construction engineered for demanding commercial applications. ADA compliant design ensures accessibility compliance while maintaining dependable performance. Designed as genuine replacement components for seamless integration with existing LCN 4000T Series door control systems.

Manufacturer Resources

LCN Full Line Catalog

Product Specs

Series:
4000T Series
Subcategory:
Parts and Accessories
Product Group:
Door Controls
Product Subgroup:
Parts and Accessories
Product Type:
Cylinders
Commercial/Residential:
Commercial
ADA Compliant:
Yes
Parts and Accessories Type:
Replacement Parts
Product Attribute:
Parts and Accessories
Product Model:
4003T-3071
Product Category:
Door Controls
Department:
Door Hardware

LCN 4003T-3071 689 – Frequently Asked Questions

1) What is the LCN 4003T-3071 cylinder assembly and what does it do on a door closer?
It's a replacement cylinder assembly for the LCN 4000T Series door closer, model 4003T-3071. The cylinder is the hydraulic body of the closer, the part that holds the fluid and the valving that controls closing and latching speed. Buying this means you're rebuilding an existing 4000T closer rather than replacing the whole unit. Cast iron body, built for commercial openings.
2) Will an LCN 4003T cylinder assembly work on any LCN closer, or only the 4000T Series?
Only the 4000T Series. The 4003T-3071 cylinder is built as a genuine replacement component for LCN 4000T Series door control systems, so identify the series stamped on the closer body before ordering. A cylinder from one LCN family is not a drop-in for another.
3) Does the 4003T cylinder assembly need to be ordered for left hand or right hand doors?
This one is the standard handed configuration, meaning it comes pre-configured for standard handing rather than as a non-handed part. Confirm the swing of the opening you're rebuilding matches before you order, because the handing is set at the cylinder, not adjusted in the field.
4) Can I rebuild an LCN 4000T closer instead of replacing the whole unit?
Yes, that's exactly what the 4003T-3071 cylinder assembly is for. When the closer body leaks or loses control of the sweep and latch speeds, the cylinder is the part that's failed. Swapping it keeps the existing arm, shoe, and mounting in place, so the door prep and fastener pattern are untouched. For an MRO or property maintenance program running a lot of LCN 4000T openings, stocking the cylinder is the cheaper path than full closer replacement.
5) Does replacing the closer cylinder with a 4003T keep the opening ADA compliant?
The 4003T-3071 cylinder assembly is ADA compliant, so a rebuilt 4000T closer stays within accessibility requirements for the opening. That matters on healthcare, education, and government work where the opening force at the door has to be verified after any closer service.
6) What finishes does the LCN 4003T cylinder assembly come in, and can I match the closers already on my other doors?
Six finishes: 689 aluminum, 690 statuary bronze, 691 light bronze, 693 gloss black, 695 dark bronze, and 696 brass. Those are the standard LCN sprayed finish numbers, so matching an existing run of 4000T closers is a matter of reading the finish code off the closer or the original order. If you're rebuilding one door in a corridor of twenty, order the finish the rest of them carry.
7) Do I get the arm and mounting hardware with the 4003T cylinder assembly?
The 4003T-3071 is the cylinder assembly only, the hydraulic body of the 4000T closer. It's sold as a replacement component for an existing installation, so the arm, shoe, and mounting hardware already on the door carry over. If the arm is bent or the shoe is pulling out of the frame, order those separately.
8) Is the LCN 4003T cylinder assembly rated for commercial use or is it a light duty residential part?
Commercial. The 4003T-3071 is a cast iron cylinder assembly for commercial door control systems, used on office buildings, schools, healthcare facilities, retail, warehouse, multi-tenant residential, and government work. Cast iron rather than aluminum is what carries the cycle count on a high traffic opening.
How fast can I get the LCN 4003T-3071 689 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the LCN 4003T-3071 689 come with a warranty?
Absolutely. The LCN 4003T-3071 689 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the LCN 4003T-3071 689?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the LCN 4003T-3071 689 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!