Marantec 178746 Vault Release Adapter Kit 560mm
The Marantec 178746 vault release adapter kit is used to connect an outside keyed release setup to the emergency release system on select Marantec garage door opener rails. This type of part is important on garages that do not have a separate entry door because a power outage, failed opener, or broken transmitter could otherwise leave the door inaccessible from outside. The 560 mm length must match the rail and release arrangement so the release can be pulled correctly without binding or being too short. This item is often searched with the newer or related 189253 vault release adapter reference, and some supplier data ties the adapter to older Marantec 1045xx, 122803, 120xxx rail references and newer 1875xx rails. Verify the rail number and lock hardware before ordering.
Compatible With
- Select Marantec garage door opener rail systems requiring an outside vault release connection
- Older Marantec 1045xx rail references when confirmed by parts diagram
- Marantec 122803 rail reference when confirmed by parts diagram
- Older 120xxx Marantec rail references when confirmed by parts diagram
- Newer 1875xx Marantec rail references when confirmed by parts diagram
- Garage doors without a secondary entry door where an emergency keyed release is needed
Features and Specifications
| Manufacturer | Marantec |
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| Product Type | Vault release adapter kit |
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| Part Number | 178746 |
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| Related / Current Reference | 189253 appears in some supplier references |
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| Length | 560 mm |
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| Application | Emergency release adapter for select Marantec rail systems |
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| Included Components | Adapter kit; outside vault lock may not be included |
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| Notes | Confirm rail number, cable length, and lock hardware |
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Also Known As / Related Part Numbers
- 178746
- 189253
- Vault Release Adapter Kit
- Vault Lock Adapter Kit
- 560mm vault release adapter
- Marantec emergency release adapter
- 1045xx rail reference
- 122803 rail reference
- 120xxx rail reference
- 1875xx rail reference
Technician Note
Match the part number, operator model, and product family before ordering. For safety-related or wiring-related parts, confirm the original installation and parts diagram instead of relying on appearance alone.
Before Ordering
- Confirm the Marantec part number printed on the old part or shown in the parts diagram.
- Match the opener model, product generation, and accessory type.
- Check frequency, wiring style, safety-device requirements, and included components where applicable.
- Review whether the old number has been superseded or is only a related search number.
- Use a qualified garage door technician for unsafe door movement, electrical diagnosis, or control-board wiring.
Professional Advisory
Garage door and gate products should be installed and serviced with all required safety devices in place. If wiring, safety sensor diagnosis, or opener troubleshooting is uncertain, have the system checked by a qualified technician.
Product Questions and Answers
What is the Marantec 178746 adapter used for?
It connects an outside keyed vault release setup to the opener emergency release on select Marantec rail systems.
Does this include the outside lock cylinder?
Common listings describe this as the adapter kit. The vault lock itself may not be included, so package contents should be checked before ordering.
Why does another listing show part number 189253?
189253 appears in supplier references as a related or current vault release adapter number. Match the rail and package label before treating it as the same item.
Why does the 560 mm length matter?
The release adapter length needs to match the rail and release location. A wrong length can prevent the emergency release from working correctly.
When is a vault release recommended?
It is commonly used on garages with no separate entry door so the door can be released from outside during a power outage or opener failure.
