1. Product Overview
The Larson Standard Duty Aluminum Pneumatic Door Closer is designed to provide smooth and controlled closing for storm doors. This closer is suitable for use with wood, metal, or vinyl doors and features non-corrosive components, making it ideal for various environments, including coastal locations.
- Provides smooth closing action for storm doors.
- Compatible with wood, metal, and vinyl doors.
- Constructed with non-corrosive components for durability.
- Allows the door to open up to a full 90 degrees.
- Includes a hold-open washer for convenience.

Figure 1: Larson Standard Duty Aluminum Pneumatic Door Closer. This image shows the complete door closer unit.
2. Package Contents
Verify that all components are present before beginning installation.
- 1 x Pneumatic Door Closer Cylinder
- 2 x Mounting Brackets
- 1 x Hold-Open Washer
- Mounting Screws
- Instruction Sheet

Figure 2: All components included with the Larson Standard Duty Aluminum Pneumatic Door Closer. This includes the closer cylinder, mounting brackets, screws, and a hold-open washer.
3. Setup and Installation
Installation of the Larson door closer is a screw-in process. Ensure you have the necessary tools before starting.
Required Tools:
- Phillips Head Screwdriver
- Tape Measure
Installation Steps:
- Position Brackets: Determine the optimal placement for the mounting brackets on your storm door and door frame. The closer is designed to allow the door to open a full 90 degrees.
- Secure Brackets: Using the provided screws and a Phillips head screwdriver, securely attach the mounting brackets to the door and frame. Ensure they are level and aligned.
- Attach Closer: Connect the pneumatic door closer cylinder to the installed brackets.
- Test Operation: Open and close the door to ensure smooth movement and proper engagement of the closer.

Figure 3: The door closer assembled with its mounting brackets. This configuration is ready for installation onto a door and frame.
4. Operating Instructions
The door closer features adjustable closing speed and a hold-open function.
Adjusting Closing Speed:
A single screw adjustment is located on the end of the closer cylinder. Turning this screw clockwise will decrease the closing speed (slower close), and turning it counter-clockwise will increase the closing speed (faster close). Adjust gradually until the desired closing speed is achieved.
Using the Hold-Open Washer:
To keep the door open in a desired position, slide the included hold-open washer onto the closer rod when the door is open. This will prevent the door from closing until the washer is removed or the door is pushed past the washer's position.
5. Maintenance
The Larson Standard Duty Aluminum Pneumatic Door Closer requires minimal maintenance.
- Regular Cleaning: Wipe the closer cylinder and brackets periodically with a damp cloth to remove dust and debris.
- Check Fasteners: Occasionally inspect all mounting screws to ensure they remain tight. Tighten any loose screws to maintain proper operation.
- Lubrication: No lubrication is typically required for pneumatic door closers.
6. Troubleshooting
Refer to the following common issues and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Door does not close completely. | Closing speed is too slow or closer is misaligned. | Increase closing speed by turning the adjustment screw counter-clockwise. Check bracket alignment and ensure no obstructions prevent full closure. |
| Door closes too quickly. | Closing speed is too fast. | Decrease closing speed by turning the adjustment screw clockwise. |
| Door closer is noisy or erratic. | Loose mounting screws or internal issue. | Check and tighten all mounting screws. If the issue persists, the closer may need replacement. |
| Door does not stay open with hold-open washer. | Washer not properly engaged or damaged. | Ensure the hold-open washer is fully slid onto the rod. Inspect the washer for damage and replace if necessary. |
7. Specifications
| Feature | Detail |
|---|---|
| Brand | Larson |
| Model Number | CH1040306 |
| Material | Aluminum |
| Finish | Aluminum |
| Color | No Color (typically white/off-white) |
| Item Weight | 14 ounces |
| Product Dimensions | 12.63 x 1.5 x 1.5 inches |
| Installation Type | Screw-In |
| Number of Pieces | 1 (closer unit) |
| Recommended Use | For use with doors to ensure smooth and safe closing |
8. Warranty Information
This Larson product comes with a manufacturer's warranty. For specific details regarding the warranty period and coverage, please refer to the documentation included with your product or visit the official Larson website. Keep your proof of purchase for warranty claims.
9. Support
For further assistance, technical support, or to inquire about replacement parts, please contact Larson customer service or visit their official website.
Manufacturer: Larson Store
Online Store: Visit the Larson Store on Amazon





