Genie 36773S.S Belt/Chain Drive Carriage Assembly with Door Arm – For 8-Foot Garage Doors

Genie

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• Product Description

  The Genie 36773S.S Belt/Chain Drive Carriage Assembly is a genuine replacement trolley for compatible Genie garage door openers equipped with an 8-foot rail configuration.

  The carriage travels along the opener rail and connects the moving belt or chain assembly to the garage door arm. When engaged, it transfers the opener’s movement to the garage door, allowing the door to open and close.

  This 8-foot version includes the straight door arm already attached to the carriage. It is intended for compatible Genie openers installed on an 8-foot-high garage door using the appropriate 8-foot rail or extension configuration.

  Features

  • Replacement carriage for compatible Genie belt-drive and chain-drive openers
  • Designed specifically for an 8-foot-high garage door configuration
  • Current Genie service part number 36773S.S
  • Also commonly marked or searched as 36773S
  • Travels inside the opener rail
  • Engages the belt or chain connector
  • Includes attached straight door arm
  • Includes emergency-release carriage mechanism
  • Compatible with select Genie residential opener models
  • No remote-control programming required
  • Travel limits must be cleared and reprogrammed after installation

  Product Specifications

  • Product type: Garage door opener carriage assembly
  • Manufacturer: Genie
  • Complete service part number: 36773S.S
  • Alternate marking: 36773S
  • Compatible drive types: Belt drive and chain drive
  • Garage door height configuration: 8 feet
  • Installation location: Inside the opener rail
  • Straight door arm included: Yes
  • Emergency-release mechanism included: Yes
  • Rail included: No
  • Belt or chain included: No
  • Opener motorhead included: No
  • Programming requirement: Open and close travel limits must be reset after installation

  Compatible Genie Garage Door Openers

  The Genie 36773S.S carriage is listed for compatible 8-foot rail versions of the following opener models and families:

  • 1028
  • 2028
  • 3020H
  • 3020H-B
  • 3120
  • 3022
  • 3024
  • 3042
  • 4022
  • 4024
  • 4042
  • SilentMax 1000
  • SilentMax 1200
  • IntelliG 1000
  • IntelliG 1200
  • ReliaG 650
  • ReliaG 850

  Compatibility depends on both the opener model and the installed rail length. A compatible opener using a standard 7-foot rail requires a different carriage.

  Important Garage Door Height Matching

  The 36773S.S is the 8-foot version of this carriage family.

  Use the following guide:

  • 36773R.S: Compatible 7-foot garage door rail configurations
  • 36773S.S: Compatible 8-foot garage door rail configurations
  • 36773T.S: Compatible 9-foot through 14-foot garage door rail configurations

  Garage door height refers to the actual height of the door and the corresponding opener rail configuration—not the length of the garage or the height of the ceiling.

  Do not order the 8-foot carriage solely because the rail appears long. Confirm the door height and installed rail or extension-kit configuration.

  Important Fitment Notes

  This carriage should be selected by checking:

  1. The complete garage door opener model number
  2. The actual garage door height
  3. Whether the opener uses a belt or chain rail
  4. The original carriage shape
  5. The part number shown in the opener’s parts diagram
  6. Whether an 8-foot extension kit is installed

  For example, a Genie SilentMax 1000 installed on a standard 7-foot-high garage door normally uses the 36773R.S carriage. The same compatible opener installed with an 8-foot extension configuration uses the 36773S.S carriage.

  Do not order based only on the opener model name.

  Not Compatible With

  The Genie 36773S.S is not intended for:

  • Standard 7-foot rail configurations requiring 36773R.S
  • 9-foot through 14-foot rail configurations requiring 36773T.S
  • Genie screw-drive garage door openers
  • Genie wall-mount garage door openers
  • Older chain-drive systems using a different carriage design
  • Other brands of garage door openers
  • Commercial trolley operators
  • Rail systems that do not match the listed Genie carriage design

  This is not a universal garage door opener carriage.

  Common Signs of a Damaged Carriage

  A replacement carriage may be needed when:

  • The belt or chain moves but the garage door does not
  • The carriage will not engage with the moving belt or chain connector
  • The emergency-release mechanism will not reconnect
  • The carriage body is cracked or physically damaged
  • The door arm connection is damaged
  • The carriage binds or moves unevenly inside the rail
  • The opener runs but the carriage remains stationary
  • The carriage releases unexpectedly during operation

  Similar symptoms can also be caused by a broken belt, damaged chain, loose tensioner, disconnected belt or chain bullet, damaged rail, incorrect travel limits, or a poorly balanced garage door.

  Inspect the complete opener system before replacing the carriage.

  Important Diagnostic Notes

  Before ordering a replacement, check whether the carriage is properly re-engaged after the emergency-release cord has been pulled.

  Depending on the opener configuration, the carriage may reconnect when the opener is operated or when the release mechanism is returned to the engaged position.

  If the opener motor runs but neither the belt nor chain moves, the problem is probably not the carriage. Inspect the motor drive gear, sprocket, belt, chain, and internal opener components.

  If the belt or chain moves but the carriage does not travel with it, inspect the carriage engagement mechanism and belt or chain connector.

  Package Contents

  • One Genie 36773S.S belt/chain drive carriage assembly
  • Attached straight garage door arm
  • Carriage emergency-release mechanism
  • Installation instructions

  The following items are not included unless specifically stated:

  • Opener motorhead
  • Rail assembly
  • Belt
  • Chain
  • Rail extension kit
  • Curved door arm
  • Header bracket
  • Mounting straps
  • Wall control
  • Safety sensors
  • Remote controls
  • Release rope and handle
  • Additional installation hardware

  Reuse of the original hardware may be required.

  Installation Overview

  Replacing this carriage is more involved than simply sliding it onto the exterior of the rail. Genie’s installation procedure requires removing the opener and rail assembly from its ceiling and header supports and performing the repair on a clean bench or floor.

  The general procedure includes:

  1. Close the garage door completely.
  2. Disconnect the garage door from the opener using the emergency release.
  3. Unplug the garage door opener.
  4. Disconnect the wall-control and Safe-T-Beam wiring.
  5. Disconnect any battery-backup or network wiring, when equipped.
  6. Separate the door arms from the garage door.
  7. Support and remove the motorhead and rail assembly.
  8. Separate the rail from the opener motorhead.
  9. Loosen the belt or chain tensioner.
  10. Partially remove the belt or chain and drive components from the rail.
  11. Slide the damaged carriage out through the door end of the rail.
  12. Install the replacement carriage with the door arm facing the garage door end of the rail.
  13. Reassemble and properly tension the belt or chain.
  14. Reinstall the opener and reconnect all wiring.
  15. Clear and reprogram the opener’s travel limits.
  16. Test all opener and safety functions.

  Refer to the opener’s owner’s manual and Genie installation instructions for the exact procedure.

  Installation Orientation

  Install the replacement carriage with its attached door arm facing the garage door end of the rail.

  Incorrect orientation can prevent the carriage from connecting properly to the garage door arm or traveling correctly through the rail.

  Before fully reassembling the rail, verify that:

  • The carriage faces the correct direction
  • The belt or chain connector engages correctly
  • The release mechanism moves freely
  • The carriage slides smoothly without binding
  • The belt or chain is routed correctly
  • The tensioner and drive components are properly seated

  Belt or Chain Tension

  The belt or chain must be loosened during carriage replacement and properly retensioned during reassembly.

  Excessive tension can place unnecessary load on the rail, sprocket, bearings, belt, chain, and motor components. Insufficient tension can cause sagging, slipping, noise, or unreliable carriage movement.

  Follow the tension specifications in the opener’s installation manual. Do not tighten the belt or chain solely by appearance.

  Travel-Limit Programming

  The opener’s open and close travel limits must be cleared and reprogrammed after the carriage and rail assembly have been reinstalled.

  Do not repeatedly operate the opener before the limits are correctly set. Incorrect limits can cause the carriage to strike the end of the rail, place excessive force on the garage door, or damage the replacement components.

  After programming, verify that the door stops at the correct fully open and fully closed positions.

  Check the Garage Door Before Installation

  A damaged carriage may be caused or accelerated by excessive resistance from the garage door.

  Before reconnecting the opener, manually check the garage door for:

  • Broken or weakened springs
  • Poor door balance
  • Bent or obstructed tracks
  • Damaged rollers
  • Loose or damaged hinges
  • Excessive door weight
  • Binding sections
  • Damaged cables or drums
  • Improper track alignment

  With the opener disconnected, the door should move smoothly by hand and remain reasonably balanced.

  Do not install a new carriage and continue operating the opener if the garage door is unusually heavy, binding, or equipped with a broken spring.

  Safety Warning

  Disconnect electrical power before removing the opener, disconnecting wiring, separating the rail, or touching internal opener components.

  The opener motorhead and rail assembly are heavy overhead components and must be properly supported during removal and installation. Do not stand beneath an unsupported opener or rail.

  Garage door springs, cables, and bottom fixtures are under extreme tension. Do not loosen or adjust these components while replacing the opener carriage.

  After installation, test:

  • Manual garage door balance
  • Full opening and closing travel
  • Belt or chain tension
  • Emergency-release operation
  • Open and close travel limits
  • Opener force settings
  • Safe-T-Beam photoelectric sensors
  • Contact-reversal system
  • Wall control
  • Remote controls

  Do not operate the garage door opener until all required safety systems are functioning correctly.

  Genie 36773S.S 8-Foot Belt/Chain Drive Carriage

   Genuine Genie 36773S.S belt and chain drive carriage assembly for compatible openers installed on 8-foot garage doors. Straight door arm included.