LCN 4021T-3071 Standard Cylind...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$491.00
$378.58
LCN 4021T-3071 Standard Cylinder Assembly for Door Closers - Cast Iron Construction

LCN 4021T-3071 Standard Cylinder Assembly for Door Closers - Cast Iron Construction

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Model: 4021T-3071 RH 689
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$491.00
$378.58
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LCN Standard Cylinder Assembly for 4020T Series Door Closers - Cast Iron Construction

Professional Replacement Component for Door Closer Systems

The LCN Standard Cylinder Assembly is specifically engineered for 4020T Series door closers, featuring durable cast iron construction for reliable performance in commercial applications. This handed cylinder assembly provides precise replacement functionality for maintaining optimal door closer operation. Designed to meet ADA compliance requirements, this component ensures continued accessibility and smooth door operation in professional installations.

Professional Features & Benefits

  • Series-Specific Compatibility: Engineered exclusively for 4020T Series door closers ensuring perfect fit and optimal performance integration.
  • Cast Iron Construction: Durable cast iron material provides exceptional strength and longevity for demanding commercial applications.
  • Handed Design: Precision-manufactured for specific door handing requirements ensuring proper installation and operation.
  • ADA Compliance: Meets ADA accessibility standards for commercial door closer applications requiring compliant operation.
  • Standard Configuration: Provides reliable replacement functionality maintaining original door closer specifications and performance.
  • Commercial-Grade Quality: Engineered for professional door control systems in high-traffic commercial environments.

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: 4021T-3071
  • Product Subgroup: Parts and Accessories
  • Product Type: Standard Cylinder Assembly
  • Series: 4020T 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 door closer components deliver professional-grade reliability with cast iron construction engineered for demanding commercial applications. ADA compliant design ensures accessibility requirements are met while maintaining dependable door control performance. Precision manufacturing and series-specific compatibility provide the exact replacement functionality needed for continued system operation.

Manufacturer Resources

LCN Full Line Catalog

Product Specs

Series:
4020T Series
Subcategory:
Parts and Accessories
Product Group:
Door Controls
Product Subgroup:
Parts and Accessories
Product Type:
Cylinder Assembly
Commercial/Residential:
Commercial
ADA Compliant:
Yes
Parts and Accessories Type:
Replacement Parts
Product Attribute:
Parts and Accessories
Product Model:
4021T-3071
Product Category:
Door Controls
Department:
Door Hardware

LCN 4021T-3071 RH 689 – Frequently Asked Questions

1) Do I have to order the LCN 4021T-3071 cylinder assembly by door handing?
Yes, handing matters on this one. The 4021T-3071 cylinder assembly is a handed part, sold in left hand and right hand versions, so you need to know which way the door swings before you order. Stand outside the door (the side the closer is not usually mounted on for regular arm installs) and determine handing the way you would for any door closer. Ordering the wrong hand means the body will not work on that opening.
2) Is the 4021T-3071 a complete door closer or just a replacement part?
It is a replacement component, not a complete closer. The cylinder assembly is the closer body that houses the hydraulics; arms, shoes, mounting plates and fasteners are separate. If you are replacing a whole unit rather than repairing one, order a complete 4020T Series closer instead.
3) What finishes can I get the 4020T cylinder assembly in to match the closers already in my building?
Six finishes are offered: 689 aluminum, 690 statuary bronze, 691 light bronze, 693 gloss black, 695 dark bronze and 696 brass. Each is available in both left hand and right hand. For a property manager matching a run of existing openings, 689 aluminum and 695 dark bronze are the two you will most often find already hanging on commercial doors.
4) Will rebuilding a 4020T closer with this cylinder assembly keep the opening ADA compliant?
The 4021T-3071 cylinder assembly is listed as ADA compliant, so a 4020T closer rebuilt with it can still be adjusted to meet accessible opening force and closing speed requirements. The compliance still depends on how you set the spring size and valves on the door once it is installed.
5) My 4020T closer is leaking oil at the body. Do I replace the whole closer?
A leaking or seized cylinder is exactly what this part addresses. The 4021T-3071 standard cylinder assembly replaces the hydraulic body while you keep the existing arm and mounting hardware, provided that hardware is in good condition. Match the handing and the finish of the closer coming off the door.
6) Is a cast iron closer cylinder durable enough for a high traffic entry?
Cast iron is the construction here, and it is what LCN uses for commercial duty bodies rather than lighter residential closers. This part is rated for commercial use and is intended for high traffic applications such as schools, hospitals, offices, retail and government buildings.
How fast can I get the LCN 4021T-3071 RH 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 4021T-3071 RH 689 come with a warranty?
Absolutely. The LCN 4021T-3071 RH 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 4021T-3071 RH 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 4021T-3071 RH 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.
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