LiftMaster K17-50223 Q209 Gear Reducer Pulley
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.
Compatible With
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.
- LiftMaster CSW200 swing gate operator
- LiftMaster CSW200U swing gate operator
- LiftMaster CSW200UL swing gate operator
- Select LiftMaster / Elite slide gate operator assemblies using Q209 / K17-50223
- Select LiftMaster / Elite swing gate operator assemblies using Q209 / K17-50223
- Older Elite DC-1000 style references only when the original diagram confirms Q209 / K17-50223
Features & Specifications
| 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 |
Also Known As / Related Part Numbers
- K17-50223
- 17-50223
- Q209
- Q046
- LM-K17-50223
Technician Note
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.
Before Ordering
- Confirm the original part number is K17-50223, Q209, or Q046
- Verify CSW200, CSW200U, CSW200UL, or supported diagram reference
- Check bore size and set screw location
- Inspect belt condition and pulley alignment
- Do not assume all Q-series pulleys interchange
Professional Advisory
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.
Product Questions & Answers
What are the alternate numbers for K17-50223?
Q209 and Q046 are commonly listed as related Elite / LiftMaster references for this gear reducer pulley.
Does it fit CSW200 operators?
Yes, K17-50223 is strongly associated with the LiftMaster CSW200, CSW200U, and CSW200UL swing gate operator family.
Can it be used on slide gate operators?
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.
What does the gear reducer pulley do?
It helps transfer belt-driven power through the gear reducer side of the operator drive system.
Why should I check the old pulley number?
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.
