Marantec 8030735, Door Arm, Straight (NEW)
The Marantec 8030735 straight door arm is the main straight link in many Marantec opener door-arm assemblies. It connects between the moving trolley and the door bracket so the opener can push the door closed and pull it open in a controlled line. When this arm is bent, missing, drilled incorrectly, or replaced with a non-matching part, the opener can pull at the wrong angle and create noise, reversal, loose hardware, or damage around the door bracket. This straight arm is commonly used on sectional garage doors and compatible Marantec rail systems. It should be matched by part number, length, hole spacing, and rail/door style. If a one-piece door or special geometry is involved, check whether a curved arm is also required by the installation manual.
Compatible With
- Select Marantec residential garage door operators with matching straight door arm geometry
- Marantec Synergy Solo, Synergy 260, Synergy 270, Synergy 280, Synergy 360, Synergy 370, and Synergy 380 applications where the door arm setup matches
- Marantec M4500, M4500e, M4700, M4700e, and M4900e style opener installations
- Marantec M50 and M55 garage door opener applications with compatible trolley and door bracket connection
- Marantec Q7500, Q7700, and Q7900 style installations where the original arm is 8030735 or matching style
- Marantec M-Line, Q-Line, EOS, and Synergy rail systems when the parts diagram calls for the straight arm
- Compatible installations using Marantec heavy-duty 2-piece, standard belt rail, or standard rail references where the arm geometry matches
Features & Specifications
| Manufacturer | Marantec |
|---|
| Product Type | Straight door arm |
|---|
| Part Number | 8030735 |
|---|
| Application | Connects opener trolley to garage door bracket |
|---|
| Compatible Operator Type | Residential Marantec garage door openers |
|---|
| Approximate Arm Style | Straight arm, commonly listed around 14-1/4 inch length in parts references |
|---|
| Notes | Confirm length, hole spacing, and rail/door application |
|---|
Also Known As / Related Part Numbers
- 8030735
- MAR-8030735
- Marantec 8030735
- Marantec straight door arm
- Straight garage door arm
- Door arm straight new
- Straight arm for Marantec opener
Technician Note
Door arms look simple, but the length, hole spacing, angle, and bracket connection matter. A straight arm should be matched to the original installation or Marantec parts diagram.
Before Ordering
- Confirm the existing arm is straight and not the curved-arm version.
- Compare the hole spacing and length to the original part.
- Inspect the door bracket and top door section for damage or flexing.
- Verify the rail and trolley are not binding before replacing the arm.
- Confirm the door is properly balanced and not overloading the opener.
Important Ordering Warnings
- Do not keep running the opener if the arm is bent, loose, or pulling out of the top door section.
- Do not drill random new holes if the correct arm or bracket is missing; poor alignment can damage the opener or door.
Professional Advisory
A garage door technician should inspect the door if the previous arm bent or tore loose, because that often points to a heavy door, stuck rollers, broken spring, or weak top section.
Product Questions & Answers
What is Marantec 8030735 used for?
It is a straight door arm used to connect the opener trolley to the garage door bracket on compatible Marantec garage door opener installations.
Is this the same as the curved door arm?
No. The curved arm is commonly referenced as 8030734. Straight and curved arms serve different geometry needs and should not be swapped without checking the manual.
Which openers commonly use this straight arm?
It is commonly associated with many Marantec Synergy, M-Line, Q-Line, EOS, M4500, M4700, M4900, M50, and M55 style opener applications when the door-arm layout matches.
Can this arm be used with heavy-duty rails?
It may be used with compatible Marantec rail systems where the parts diagram calls for it, including certain heavy-duty and standard belt rail references. Confirm the exact rail style before ordering.
Why did my door arm bend?
A bent arm can be caused by a stuck or heavy door, poor door balance, missing reinforcement, binding rollers, or a wrong arm/bracket setup. The door should be inspected before replacement.
