LiftMaster 8550W 8550W Owners Manual - Page 42
Repair Parts, Rail Assembly Parts, Installation Parts
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Repair Parts Rail Assembly Parts Description 1 Belt - for 7 foot door Belt - for 8 foot door Belt - for 10 foot door 2 Belt Pulley Bracket 3 Master Link 4 One-Piece Rail 7 feet (2.1 m) One-Piece Rail 8 feet (2.4 m) One-Piece Rail 10 feet (3 m) 5 Trolley Assembly 6 Tensioner Assembly 7 Trolley Threaded Shaft Part Number 41A5434-11 41A5434-13 41A5434-14 41B5424 4A1008 2777BD 2778BD 2770BD 41B3869-3A 41B4103 109B48 3 6 2 4 7 5 1 Installation Parts Description 1 Curved Door Arm 2 Door Bracket with Clevis Pin and Fastener 3 Emergency Release Rope and Handle 4 Header Bracket with Clevis Pin and Fastener 5 Remote Control Visor Clip 6 Safety Sensor Bracket 7 Safety Sensor Kit with receiving and sending sensors with 3 feet (.9 m) 2-conductor wire 8 Straight Door Arm 9 White and Red/White Wire 10 3V CR2032 Lithium Battery Not Shown User's Guide Part Number 178B35 41A5047-1 41A2828 41A4353-1 29C151 41A5266-1 041A5034 178B34 41B4494-1 10A20 114A4761 2 3 1 7 4 6 5 8 9 10 42