LCN 4021-3071 Cast Iron Cylind...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$491.00
$368.71
LCN 4021-3071 Cast Iron Cylinder Assembly for Door Closers with Aluminum Finish

LCN 4021-3071 Cast Iron Cylinder Assembly for Door Closers with Aluminum Finish

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Model: 4021-3071 RH 689

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

$491.00
$368.71
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LCN Cast Iron Cylinder Assembly for 4020 Series Door Closers with Aluminum Finish

Professional Door Closer Replacement Component

The LCN Cast Iron Cylinder Assembly is a precision-engineered replacement component designed specifically for 4020 Series door closers. This handed standard cylinder assembly features durable cast iron construction with aluminum finish for reliable performance in commercial door control applications. ADA compliant design ensures accessibility compliance in professional installations.

Professional Features & Benefits

  • Series-Specific Compatibility: Engineered exclusively for 4020 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.
  • Aluminum Finish: Professional aluminum finish offers corrosion resistance and maintains appearance in high-traffic environments.
  • Handed Configuration: Standard handed design accommodates specific door swing requirements for proper closer operation.
  • ADA Compliance: Meets ADA requirements for accessibility applications ensuring code compliance in commercial installations.
  • Commercial-Grade Design: Engineered for commercial door control systems where reliable operation is essential.

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: 4021-3071
  • Product Subgroup: Parts and Accessories
  • Product Type: Door Closer Parts and Accessories
  • Series: 4020 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 code compliance while maintaining the dependable performance expected from LCN door control systems. Precision manufacturing guarantees proper fit and function with 4020 Series door closers.

Manufacturer Resources

LCN Full Line Catalog

Product Specs

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

LCN 4021-3071 RH 689 – Frequently Asked Questions

1) Does the LCN 4021-3071 cylinder assembly have to be ordered left hand or right hand?
Handing matters on this part. The 4021-3071 cast iron cylinder assembly comes as LH - Left Hand or RH - Right Hand, and you pick the one that matches the closer it is going into. Stand on the side the door swings away from you, hinges on your left is left hand. Order the wrong hand and the assembly will not operate the closer correctly, so confirm the hand of the existing 4020 Series closer before you buy.
2) Does replacing the cylinder assembly on a 4020 closer keep the door ADA compliant?
The 4021-3071 cylinder assembly is ADA compliant, so a 4020 Series closer rebuilt with it stays on the accessibility side of the line. That matters on interior openings in schools, healthcare, and government buildings where opening force gets checked. You still set closing speed and force at the closer's own valves and spring adjustment after the swap, so verify the opening force on the door once the part is in.
3) Is a cast iron cylinder assembly worth it on a high traffic commercial door, or should I just swap the whole closer?
Cast iron is what LCN uses on the 4020 cylinder because that body takes the hydraulic pressure every cycle, and it holds up in high traffic openings like retail entries, school corridors, and warehouse doors. Rebuilding with the cylinder assembly makes sense when the rest of the closer is sound and the leak or the lost speed control traces to the cylinder. If the arm is bent, the shoe is pulling out of the frame, or the closer is an older non-4020 unit, replace the closer.
4) I manage a building with a lot of LCN 4020 closers. Can I stock one cylinder assembly for all of them?
Not with one. The 4020 Series cylinder assembly is handed, so a full spare kit for a mixed building means one LH and one RH on the shelf. That is the usual approach for MRO stock rooms standardized on the 4020 Series: keep both hands and you can rebuild any opening in the building without waiting on a hand-specific order.
5) Will the aluminum finish on the LCN 4021-3071 match the closers already on my other doors?
The 4021-3071 comes in an aluminum finish, which is the common painted finish on commercial LCN closers, so a rebuilt unit will read the same as neighbouring aluminum-finish closers in a corridor. Bear in mind this is the cylinder, the part the cover sits over, so on a covered installation the finish is barely seen anyway. If your building is standardized on a dark bronze or brass-look cover, the cover is what carries that appearance, not this component.
How fast can I get the LCN 4021-3071 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 4021-3071 RH 689 come with a warranty?
Absolutely. The LCN 4021-3071 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 4021-3071 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 4021-3071 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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