1. Einleitung
This manual provides essential instructions for the proper installation, maintenance, and troubleshooting of the DoorKing #40 chain accessory (Model DK2600-442). This chain is designed for use with DoorKing Model 9050 and 9070 slide gate operators. Please read this manual thoroughly before beginning any installation or maintenance procedures to ensure safe and correct operation.
The package includes 20 feet of #40 chain and two master links, which are crucial components for connecting the chain ends and securing it to the gate operator system.
2. Sicherheitshinweise
Always observe the following safety precautions during installation, maintenance, and operation of the gate operator system:
- Stromversorgung trennen: Always disconnect all electrical power to the gate operator before performing any installation, maintenance, or repair work.
- Qualifiziertes Personal: Installation and service should only be performed by qualified and experienced personnel.
- Persönliche Schutzausrüstung (PSA): Tragen Sie geeignete persönliche Schutzausrüstung, einschließlich Schutzbrille und Handschuhen, um Verletzungen zu vermeiden.
- Engpässe: Be aware of moving parts and potential pinch points when working near the gate operator and chain.
- Sichere Komponenten: Ensure all components, especially master links, are securely fastened to prevent accidental detachment.
3. Installationsanweisungen
This section outlines the steps for installing the #40 chain onto your DoorKing Model 9050 or 9070 slide gate operator.
3.1 Komponenten überview
The accessory package includes:
- 20 feet of #40 roller chain
- Two #40 master links

Abbildung 1: Example of #40 roller chain and master links. The chain is a series of interconnected metal links, and the master links are used to join chain ends.
3.2 Schritte zur Kettenmontage
- Bereiten Sie den Bediener vor: Ensure the gate operator is powered off and the gate is in a safe, stationary position. Refer to your specific DoorKing 9050 or 9070 operator manual for detailed safety and preparation steps.
- Measure and Cut Chain: Carefully measure the required length of chain for your gate installation. The chain should span the length of the gate, allowing for connection to the operator's chain brackets. Cut the #40 chain to the appropriate length using a chain breaker tool.
- Attach Chain to Gate Brackets: Securely attach one end of the #40 chain to the gate's front chain bracket. Use one of the provided master links to create a loop or connection point as required by your gate's design. Ensure the master link clip is fully seated and secure.
- Route Chain Through Operator: Route the chain around the operator's drive sprocket. Ensure the chain teeth engage correctly with the sprocket.
- Attach Second End to Gate Brackets: Pull the chain taut and attach the other end to the gate's rear chain bracket. Use the second master link to complete this connection. Again, verify the master link clip is securely in place.
- Kettenspannung einstellen: The chain should be taut but not overly tight. There should be a slight amount of slack (typically 1/4 to 1/2 inch of vertical movement) to prevent excessive wear on the operator and chain. Adjust the chain tensioning mechanism on your gate operator as per its specific manual.
- Überprüfen Sie alle Verbindungen: Double-check all chain connections, especially the master links, to ensure they are properly installed and secure.
- Testbetrieb: Restore power to the gate operator. Carefully test the gate's movement, observing the chain for smooth operation, proper tension, and any signs of binding or misalignment. Make any necessary adjustments.
4. Wartung
Regular maintenance of the #40 chain is crucial for extending its lifespan and ensuring reliable gate operator performance.
4.1 Inspektionsplan
- Monatlich: Visually inspect the entire length of the chain for signs of wear, rust, corrosion, bent links, or damage. Check master links for security.
- Vierteljährlich: Check chain tension. Adjust if too loose or too tight.
- Jährlich: Perform a thorough cleaning and lubrication.
4.2 Reinigung und Schmierung
- Stromversorgung trennen: Always disconnect power to the gate operator before cleaning or lubricating the chain.
- Reinigen Sie die Kette: Use a stiff brush and a suitable degreaser to remove dirt, grime, and old lubricant from the chain. Wipe the chain clean with a rag.
- Schmiermittel auftragen: Apply a high-quality chain lubricant specifically designed for outdoor use or gate operators. Ensure the lubricant penetrates between the rollers and pins of the chain. Avoid using grease, which can attract dirt.
- Überschüssiges Material abwischen: Wipe off any excess lubricant to prevent it from attracting dust and debris.

Abbildung 2: Applying lubricant to the #40 roller chain. Ensure lubricant reaches all moving parts of the chain links.
4.3 Chain Replacement
Replace the chain if you observe significant wear, stretching, rust that cannot be removed, or any broken links. Worn chains can lead to poor gate operation and potential safety hazards.
5. Fehlerbehebung
This section addresses common issues related to the #40 chain. For issues related to the gate operator itself, refer to the DoorKing 9050 or 9070 operator manual.
| Problem | Mögliche Ursache | Lösung |
|---|---|---|
| Chain is excessively noisy. | Lack of lubrication, improper tension, worn chain or sprocket. | Clean and lubricate the chain. Adjust chain tension. Inspect chain and sprocket for wear and replace if necessary. |
| Chain appears loose or sags. | Chain stretching due to wear, improper initial tension. | Adjust chain tension. If chain is significantly stretched or worn, replace it. |
| Gate movement is jerky or inconsistent. | Uneven chain tension, binding links, worn chain or sprocket. | Check and adjust chain tension. Inspect chain for bent or binding links. Replace worn components. |
| Master link detaches. | Improper installation of master link clip, excessive force, worn master link. | Reinstall master link correctly, ensuring clip is fully seated. Replace master link if damaged or worn. |
6. Spezifikationen
- Produktmodell: DK2600-442
- Kettentyp: #40 Rollenkette
- Länge: 20 Fuß (6.1 Meter)
- Enthaltene Komponenten: 2 x #40 Master Links
- Kompatibilität: DoorKing Model 9050 and 9070 Slide Gate Operators
- Material: Stahl
7. Garantieinformationen
This DoorKing #40 chain accessory is typically covered under a limited warranty against defects in materials and workmanship. The specific terms and duration of the warranty may vary. Please refer to the warranty documentation provided with your original DoorKing gate operator or visit the official DoorKing webAuf der Website finden Sie detaillierte Garantieinformationen. Bewahren Sie Ihren Kaufbeleg für Garantieansprüche auf.
Note: Damage resulting from improper installation, lack of maintenance, or misuse is generally not covered under warranty.
8. Kundendienst
For technical assistance, replacement parts, or further information regarding your DoorKing #40 chain or gate operator, please contact DoorKing customer support or your authorized DoorKing dealer.
DoorKing Official WebWebsite: www.doorking.com
Please have your product model number (DK2600-442) and gate operator model (9050 or 9070) available when contacting support.





