Marantec 98875 Chain Rail Position Reference Tab
Marantec 98875 is the chain rail position reference tab used on select Marantec chain-drive garage door opener rail systems. It is commonly referred to as a shark tooth or position reference tab because it is the rail-mounted reference piece that works with the opener reference switch. When the tab is missing or damaged, the opener may not know where the trolley is in the travel cycle, which can lead to limits that will not set, incorrect stopping points, or travel error symptoms. This is not a complete chain assembly. It is a rail reference component that must match the original chain rail design and the specified Marantec part number.
Common Replacement Reasons
- Opener cannot find or hold travel limits
- Door stops in the wrong position
- Reference tab is missing from the chain rail
- Travel errors continue after chain movement is confirmed
Compatible With
- Marantec EX-2005, EX-2007, and LC1000 rail assemblies when the original tab type matches
- Marantec M4500, M4500e, M4500eI, M4700, M4700e, M4700eI, and M4900e rail assemblies when confirmed by rail type
- Marantec M50, M55, Q7500, Q7700, and Q7900 rail assemblies when confirmed by the parts diagram
- Marantec Synergy 260, Synergy 270, Synergy 280, Synergy 360, Synergy 370, Synergy 380, and Synergy Solo rail assemblies when the rail uses the same replacement tab design
Features and Specifications
| Manufacturer | Marantec |
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| Product Type | Chain rail position reference tab |
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| Part Number | 98875 |
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| Application | Reference tab repair for select chain rail systems |
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| Compatible Operator Type | Residential Marantec chain-drive garage door opener rails |
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| Related Rail Type | Chain rail |
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| Related Reference Switch | 104083 commonly referenced |
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| Notes | Belt rail applications commonly use 96834 instead |
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Also Known As / Related Part Numbers
- 98875
- MAR-98875
- Marantec 98875 chain tab
- Marantec shark tooth position reference tab
- Marantec chain rail reference tab
- Position reference tab for Marantec chain rail
- Related belt tab: 96834
- Related reference switch: 104083
- Related chain connector reference: 8030234 in some older diagrams
Technician Note
Limit problems on Marantec chain rail systems are often caused by the tab, reference switch, or rail connection. Inspect all three before replacing more expensive electronics.
Important Ordering Warnings
- For chain rails only
- Not a complete chain assembly
- A failed reference switch can mimic a broken tab
Before Ordering Checklist
- Confirm the opener uses a chain rail
- Match the existing tab style to part 98875
- Inspect the reference switch and rail connection
- Check that the chain and trolley are moving correctly
- Do not use 96834 unless the opener has a belt rail
Professional Advisory
Keep hands clear of the chain and rail path. Disconnect power before inspection, and have a qualified technician service the opener if the door is binding or if the rail hardware is damaged.
Product Questions and Answers
What is Marantec 98875 used for?
Marantec 98875 is a replacement position reference tab for compatible Marantec chain rail systems.
Is 98875 the same as 96834?
No. 98875 is for chain rail applications, while 96834 is commonly used for belt rail tab repair.
Does the chain tab affect travel limits?
Yes. The tab works with the reference switch to help the opener determine open and close travel position.
Will 98875 fit every Marantec chain rail?
No. It should be used only on chain rail assemblies that specify 98875 or match the original tab design.
What related part should I inspect?
Inspect the reference switch, commonly searched as 104083, because a bad switch can cause similar symptoms.
