The K17-50223 pulley is a gear reducer pulley used in the drive train of select LiftMaster / Elite commercial gate operators. It is the pulley that works with the belt path at the gear reducer, so it affects belt tracking, operator speed, and torque delivery to the gate. When this pulley wears or loosens, the operator may run unevenly, make drive noise, or damage the belt.
This part has several old-style Elite references, which is common with CSW200 and related commercial gate operators. Q046 and Q209 may appear in older diagrams or distributor listings. Because these older systems can have revisions, the original part and diagram should be checked rather than relying on appearance alone.
Compatibility references include the CSW200 family and various LiftMaster slide or swing gate operators where Q209 / K17-50223 is shown. Use the parts diagram for confirmation.
| Specification | Details |
|---|---|
| Manufacturer | LiftMaster |
| Product Type | Gear reducer pulley |
| Part Number | K17-50223 |
| Application | Gear reducer pulley in belt drive assembly |
| Compatible Operator Type | Select slide and swing gate operators |
| Common Model Family | CSW200 series |
| Related Elite References | Q046, Q209 |
| Notes | Verify bore, belt alignment, and original pulley reference before ordering |
On CSW200 operators, pulley wear is often tied to belt tension, gear reducer movement, or loose set screws. Inspect the belt, set screws, key, shaft, and motor pulley before putting the operator back in service.
Disconnect power before servicing the operator. For high-voltage wiring, three-phase equipment, moving gate hardware, or uncertain diagnosis, use a qualified gate technician. Do not bypass entrapment protection or safety devices to make an operator run.
Q209 and Q046 are commonly listed as related Elite / LiftMaster references for this gear reducer pulley.
Yes, K17-50223 is strongly associated with the LiftMaster CSW200, CSW200U, and CSW200UL swing gate operator family.
Some listings describe use with various LiftMaster slide and swing gate operators. Use the parts diagram to confirm before ordering for a slide gate model.
It helps transfer belt-driven power through the gear reducer side of the operator drive system.
Older Elite operators may use similar-looking pulleys with different dimensions or offsets. The old part number and diagram are the safest way to confirm fitment.