Door Arms
The LiftMaster 8557 garage door openers use a 3/4 HP motor with a full belt rail assembly. This model has two lights and optional wifi. Use our parts diagram for reference with all available parts listed below.
The LiftMaster 8557 garage door openers use a 3/4 HP motor with a full belt rail assembly. This model has two lights and optional wifi. Use our parts diagram for reference with all available parts listed below.
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- LiftMaster 178B35 Curved Door Arm SectionSKU: 178B35$15.18Replaces part numbers: 041B0035B, 4178B0035B, 178B32,…
- LiftMaster 178B34 Straight Door Arm SectionSKU: 178B34$19.97Replaces part numbers: 178B33 and 4178B00348. Compatible…