Quick Answer

The LCN 2310ME Sentronic door closer has 18 replacement parts available at Security Parts. The most frequently replaced components are the 2310ME-3034 track roller, the 2310ME-3038 standard track, the 2310ME-3077T standard arm, and the 2310ME-3351 ME switch assembly. The standard arm requires hand and finish specification at order. The track is non-handed but still requires finish specification. The ME switch assembly requires voltage specification and accepts both AC and DC input. All 18 parts are stocked individually and available to order now.

What Is the LCN 2310ME?

The LCN 2310ME is a Sentronic series door closer designed for fire and smoke barrier doors. It is UL and cUL listed for smoke barrier or labeled fire doors and meets ANSI/BHMA A156.15 and NFPA 101 Life Safety Code standards. The closer mounts concealed in the frame with a single lever track arm that runs concealed inside the door. This keeps all mechanical and electrical components out of sight while delivering full fire life safety function.

The 2310ME holds the door open at an adjustable position using an electrical signal. When that current is interrupted, whether by a fire alarm activation, a power failure, or a manual switch, the holding mechanism releases immediately and the door closes fully under spring power. When the hold-open function is not engaged or when current is cut, the 2310ME functions as a standard full rack-and-pinion door closer. This behavior is built in by design. Fire-rated openings must close and latch automatically on any power interruption, and the 2310ME is built to meet that requirement.

How Does the LCN 2310ME Hold-Open System Work?

The hold-open function is controlled by an electrical signal fed to the ME switch assembly (2310ME-3351). When the signal is active, the assembly engages the holding mechanism and the door stays open at the set position. When the signal drops, the hold-open releases instantly and the spring closes the door.

The ME switch assembly circuitry accepts either AC or DC input. Voltage must still be specified at order. The 2310ME is available with a 24V holding solenoid or a 120V holding solenoid. A transformer (2310ME-3210) can be used to reduce 120V line voltage down to 24V AC. The wiring input range for the closer covers 12V, 24V, and 120V AC/DC, which allows the 2310ME to integrate with a wide variety of fire alarm panels and detection systems.

The hold-open position is not mechanical. It is set electrically and the door closes under spring force once the signal drops. This is what makes the 2310ME suitable for fire and smoke barrier doors where consistent, code-compliant closing is required.

What Are the Size and Spring Options on the LCN 2310ME?

The 2310ME is available in size 3 or size 4. Cylinder assemblies are size-specific and are not adjustable between sizes. Confirm the size of the existing installation before ordering any cylinder-related parts. Closing power of the 2310ME Series may be increased up to 15%. The closer ships with minimum closing power pre-set. Closing power can be increased by turning the spring adjusting screw clockwise, with a maximum adjustment of 18 turns. The holding force is set at maximum from the factory and can be decreased and increased again, but cannot be increased beyond the original factory setting.

A normal closing time from a 90-degree open position is 5 to 7 seconds. If the door closes outside this range and the spring has not been adjusted beyond the maximum, inspect the track roller and track for wear before making further adjustments.

Where Is the LCN 2310ME Typically Installed?

The 2310ME is used in commercial buildings, healthcare facilities, schools, institutional settings, and any opening that requires a door to stay open during normal operations but close and latch automatically on a fire alarm activation or power failure. Its concealed-in-frame mounting makes it well suited for openings where exposed arms or hardware would create an obstruction or accessibility issue.

The 2310ME mounts concealed in the frame. The related 4310ME mounts on the hinge pull side with a single lever track arm. The 4410ME mounts on the top jamb push side with a double lever regular arm. All three are part of the Sentronic ME series but use different mounting configurations and have their own specific part numbers. Do not substitute parts between the 2310ME, 4310ME, and 4410ME without confirming compatibility with Security Parts.

For a full overview of LCN door operator and closer categories stocked at Security Parts, see the door operators parts guide and the door closers parts guide.

What LCN 2310ME Parts Are Available?

All 18 LCN 2310ME replacement parts are stocked individually at Security Parts. The table below lists every part by number, name, and the specification required at the time of order.

Track and Arm Components

The track-arm system on the 2310ME consists of three separate parts: the track roller, the standard track, and the standard arm. Each is ordered individually and each serves a distinct mechanical function. The track and roller are non-handed. The arm is handed. Understanding these distinctions before ordering prevents receiving the wrong part.

What Does the LCN 2310ME Track Roller Do?

The 2310ME-3034 track roller rides inside the door track as the door travels through its opening and closing cycle. It is a quiet, low-friction roller assembly. The track roller is non-handed and does not require a finish specification. It inserts directly into the standard track and is secured by the roller lock screw (2310ME-425).

The track roller shoulder dimension is 1/16 inch (2mm). This is useful for confirming a replacement roller matches the original when inspecting a worn component. When the track roller wears, the door may begin to drag, produce noise, or close inconsistently. The roller lock screw (2310ME-425) secures the roller in position. If the roller is being replaced, inspect the roller lock screw at the same time.

What Is the Standard Track on the LCN 2310ME?

The 2310ME-3038 standard track runs concealed inside the door and guides the track roller through the full door travel cycle. The standard track is non-handed. The same part number fits both left-hand and right-hand doors. Finish specification (F) is required at order.

The track and track roller are separate parts and each is ordered individually. If only the roller shows wear, order the 2310ME-3034 roller alone. If the track channel is damaged or bent, order the 2310ME-3038 track separately. Neither part requires replacing the full arm assembly.

Important for older installations: LCN redesigned track-style closer components in February 2016. This redesign affected the roller, track, hold-open clip, and bumper. Closers installed before February 2016 may require different or additional parts. If you are servicing an older 2310ME installation and a part does not appear to match the current catalog, contact Security Parts at 845-935-0301 before ordering.

Is the LCN 2310ME Standard Arm Handed?

Yes. The 2310ME-3077T standard arm is handed and requires both a finish specification (F) and a hand specification (H) at order. Confirm the hand of the door before ordering. Installing the wrong hand will prevent the arm from seating correctly on the closer shaft.

To identify the hand of the door, stand on the outside (the side the door swings away from when opened). If the hinges are on the right, the door is right-hand. If the hinges are on the left, the door is left-hand. The arm attaches to the closer shaft and is secured with the arm screw (2310ME-159). Both the arm and arm screw are ordered separately.

Electrical and Control Components

The 2310ME includes several electrical components unique to the Sentronic series. These parts control the hold-open function, the wiring interface, and the power supply. Each is ordered individually. Several require voltage to be confirmed before ordering.

What Is the LCN 2310ME ME Switch Assembly?

The 2310ME-3351 ME switch assembly is the on/off switch that controls the hold-open function. When the switch receives an electrical signal, the holding mechanism engages and the door stays open. When the signal is removed or the current is interrupted, the holding mechanism releases and the door closes under spring power.

Voltage specification (V) is required at order. The 2310ME-3351 is available in 24V or 120V. The ME switch assembly circuitry accepts either AC or DC input, which allows it to integrate with most commercial fire alarm panels and detection systems. Confirm the voltage of the existing electrical system before ordering. A 24V switch assembly installed on a 120V circuit, or vice versa, will not function correctly and may damage the component.

What Does the LCN 2310ME Transformer Do?

The 2310ME-3210 transformer reduces line voltage from 120V to 24V AC. It mounts on a plate designed for a 4-inch x 4-inch x 2-1/8-inch electrical box. No voltage or finish specification is required when ordering the transformer.

If an installation runs 120V line voltage but uses a 24V ME switch assembly, the transformer provides the voltage conversion in between. If the hold-open function fails and the ME switch assembly tests correctly, inspect the transformer before ordering additional parts. A failed transformer will prevent the switch assembly from receiving proper voltage even if the assembly itself is functional.

What Does the LCN 2310ME Input Jumper Do?

The 2310ME-3431 input jumper manages the wiring configuration for the activation input on the closer. No specification is required at order. When rewiring an existing 2310ME installation or replacing control components, confirm whether the input jumper needs replacement alongside the ME switch assembly.

What Does the LCN 2310ME Wiring Cover Do?

The 2310ME-172 wiring cover protects the electrical wiring and connections on the closer body. No specification is required at order. If the wiring cover is cracked, missing, or damaged, replace it before returning the closer to service. Exposed wiring connections on a fire life safety device create both a reliability risk and a compliance concern.

Does the LCN 2310ME Electrical System Accept AC and DC Input?

Yes. The ME switch assembly circuitry accepts either AC or DC input. This gives the 2310ME broad compatibility with different fire alarm panel types. Most commercial fire alarm systems output 24V DC. Some older systems and transformer-fed circuits output 24V AC or 120V AC. The 2310ME handles all of these when the correct voltage variant of the switch assembly is specified at order.

The wiring input range covers 12V, 24V, and 120V AC/DC. When in doubt about the voltage in an existing installation, measure the output at the wiring terminals before ordering any replacement electrical component. Contact Security Parts at 845-935-0301 if confirmation is needed before placing the order.

Finish and Cover Components

Which Finish Plate Does the LCN 2310ME Use?

The 2310ME has two finish plate options ordered separately. Both require a finish specification (F) at order.

Measure the frame depth before ordering. The cover screw (2310ME-31) secures the finish plate and is ordered separately. Note that the 2310ME-72 in the LCN catalog refers to both the finish plate 11 and short finish plate 12 together as a combined set. When ordering at Security Parts, order each plate individually by its specific part number.

What Is the LCN 2310ME Fire Shield?

The 2310ME-420 fire shield is used in fire-rated installations of the 2310ME closer. No specification is required at order. If the fire shield is damaged or missing from a fire-rated installation, replace it before returning the door to service. On fire-rated openings, missing or damaged components that are part of the rated assembly may affect code compliance.

Screw Packs and Hardware

Which Screw Pack Do I Need for the LCN 2310ME?

The 2310ME uses two different screw packs depending on the door substrate and mounting method. Both require a finish specification (F) at order.

Confirm the door substrate and mounting method before ordering. Ordering the wrong screw pack will require a separate order before installation can proceed.

What Happens When Power Is Cut to the LCN 2310ME?

When electrical current to the 2310ME is interrupted, the hold-open mechanism releases immediately and the door closes under its own spring force. The closer then functions as a standard full rack-and-pinion door closer until power is restored and the hold-open signal is re-engaged. This fail-safe behavior is required for fire and smoke barrier door applications and is built into the 2310ME by design.

What Should I Do If the Door Slams Shut After Power Interruption?

If the door closes faster than the normal 5 to 7 second range, the closing speed adjustment valve may be set too fast. Use a 3/32-inch hex wrench and adjust the closing speed valve slowly. Test the door after each adjustment. Do not allow the door to slam into the frame under any spring setting. Slamming causes damage to the frame, latch hardware, and arm assembly over time.

If adjusting the closing speed valve does not correct the problem, inspect the track roller (2310ME-3034) for wear. A worn roller provides less resistance during the closing cycle and can make the door appear to close faster than expected. Replace the track roller if it shows visible wear or flat spots.

Can the LCN 2310ME Be Released Manually Without Cutting Power?

Yes. Pulling the door firmly when it is in the held-open position releases the hold-open mechanism and allows the door to close under spring power. This is the manual release method described in the LCN installation instructions for the 2310ME. The door should close completely after a manual release. If it does not close and latch, inspect the spring power setting and confirm the closing speed valve is not over-restricted.

The LCN ME Series does not provide a solid 180-degree hold-open position. The hold-open position is adjustable within the closer's range. If a 180-degree hold-open is required, a different product type is needed.

For guidance on door closer sizing and adjustment, see the LCN door closer sizing guide and the guide to adjusting a commercial door closer.

How Do I Order the Correct LCN 2310ME Replacement Part?

Several 2310ME parts require specification at the time of order. Using the wrong variant will result in a part that does not fit or does not function correctly. The table below summarizes what to confirm before placing each type of order.

How to Identify the Hand of a 2310ME Installation

Stand on the outside of the door (the side the door swings away from when opened). If the hinges are on the right, the door is right-hand. If the hinges are on the left, the door is left-hand. The 2310ME standard arm is handed and confirming this before ordering prevents receiving the wrong variant.

How to Identify the Finish of an Existing 2310ME Component

LCN closer hardware is available in standard finish codes. Common codes include 689 for aluminum, 693 for dark bronze, and 626 for satin chrome. If the finish designation is not legible on the existing hardware, match it visually and confirm with Security Parts at 845-935-0301 before ordering.

What Is Included in the LCN 2310ME Rebox Kit?

The 2310ME Rebox Kit includes the box and instruction sheet for the closer. The rebox kit, flat box, and instruction sheet are each available individually and do not require any specification at order. These are ordered when original packaging and documentation need to be replaced for a reinstallation or compliance inspection.

LCN 2310ME Troubleshooting: Hold-Open and Closing Issues

The troubleshooting guidance below is based on verified LCN documentation. It covers the most common issues reported on Sentronic ME Series closers. For complex electrical faults, contact Security Parts at 845-935-0301 before ordering parts.

What Causes the LCN 2310ME to Creep Shut?

If the 2310ME creeps shut or will not hold open, first verify that proper voltage is being supplied to the closer. Measure at the wiring terminals and confirm the voltage matches the specification of the installed ME switch assembly. If the voltage is correct, check the on/off switch (ME switch assembly). A faulty or worn switch assembly that is not maintaining the holding signal will cause the door to creep shut even when voltage is present.

Replace the 2310ME-3351 ME switch assembly if voltage is confirmed correct and the on/off switch is not maintaining the hold-open signal. Also inspect the input jumper (2310ME-3431) and transformer (2310ME-3210) if the switch assembly tests correctly.

What Causes the LCN 2310ME to Pop Back Into Hold Open While Closing?

If the door pops back into the hold-open position while it is in the process of closing, the closing speed adjustment is set too fast. A fast closing speed can cause the door to rebound and re-engage the hold-open before it travels through the full closing cycle. Slow down the closing speed valve using a 3/32-inch hex wrench and retest. If the issue continues after adjusting the closing speed, contact Security Parts for further guidance.

What Causes the LCN 2310ME to Close Too Slowly or Fail to Latch?

If the door closes slowly or fails to latch, check the spring power adjustment first. The maximum spring increase is 18 turns clockwise from the factory setting. Closing power of the 2310ME Series may be increased up to 15%. If the spring is already at maximum and the door still fails to latch, inspect the track roller (2310ME-3034) for wear or binding inside the track. A worn roller creates resistance during the closing cycle and can prevent consistent latching on high-traffic or heavy doors.

For guidance on installing a commercial door closer and adjusting it correctly, see the how to install a commercial door closer guide.

Routine Maintenance and Inspection Checklist for the LCN 2310ME

Scheduled maintenance on the 2310ME reduces unplanned part replacements and keeps fire-rated openings code-compliant. The following checks should be part of every maintenance visit on an installation that uses the 2310ME.

What to Inspect During Routine 2310ME Maintenance

• Track roller (2310ME-3034): Look for flat spots, cracking, or wear on the roller surface. A worn roller is the most common source of noise and inconsistent closing speed on this series. Check the shoulder dimension is intact and the roller moves freely inside the track.
• Standard track (2310ME-3038): Inspect for bending, cracking, or debris inside the channel. Clean the track channel and confirm the roller moves through the full travel range without binding.
• Arm screw and roller lock screw: Check the 2310ME-159 arm screw and 2310ME-425 roller lock screw for tightness. Loose fasteners cause play in the arm-to-shaft connection and accelerate wear on both the arm and closer shaft.
• Wiring connections: Inspect connections at the ME switch assembly (2310ME-3351) and transformer (2310ME-3210) for loose terminals, corrosion, or damaged insulation. Loose or corroded connections are a common cause of intermittent hold-open failure.
• Closing test: Open the door to approximately 90 degrees, release it, and confirm it closes and latches within 5 to 7 seconds. If it does not, check the spring setting and the track roller.
• Hold-open test: Verify the door holds open when the electrical signal is active. Then interrupt the power supply or activate a fire alarm test signal and confirm the door closes fully and latches. If the door does not close and latch during this test, troubleshoot the ME switch assembly and spring power before ordering parts.
• Wiring cover and fire shield: Confirm the 2310ME-172 wiring cover and the 2310ME-420 fire shield (on fire-rated installations) are present, intact, and properly secured.

LCN 2310ME vs Other LCN Sentronic Models: Which Parts Guide to Use

The 2310ME, 4310ME, and 4410ME are all part of the Sentronic ME series but have different mounting configurations and different part numbers. The 2310ME mounts concealed in the frame. The 4310ME mounts on the hinge pull side. The 4410ME mounts on the top jamb push side. Do not substitute parts between these models without confirming compatibility with Security Parts.

About Security Parts

Security Parts stocks replacement parts for commercial door closers, door operators, exit devices, and access hardware. All 18 LCN 2310ME parts listed in this guide are stocked and verified for immediate ordering. Security Parts serves facility managers, locksmiths, door hardware distributors, and maintenance professionals who need the correct part quickly without sourcing delays.

Call 845-935-0301 to confirm part specifications, check availability, or get guidance on a specific 2310ME installation. All 18 LCN 2310ME parts are available to order at Security Parts now.

Related Resources at Security Parts

• Door Operators Parts Guide
• Door Closers Parts Guide
• LCN 9150 Parts Guide
• LCN Senior Swing IQ Parts Guide
• LCN 9530IQ Parts Guide
• How to Install a Commercial Door Closer
• How to Adjust a Commercial Door Closer
• LCN Door Closer Sizing Guide