LiftMaster K17-35661 Gear Reducer Pulley Kit
The K17-35661 pulley kit is used in the drive train of select LiftMaster RSL12V series slide gate operators. Its job is to keep belt-driven power transfer aligned between the motor and the gear reducer so the gate can move smoothly under load. When this pulley area wears, the operator may chatter, slip, lose speed, or show belt dust inside the cover.
This is not a universal slide gate pulley kit. The RSL12V and RSL12VH platform uses specific pulley spacing and belt geometry, and similar looking parts from CSL, SL, or other gate operators should not be substituted without a parts diagram match. When replacing this kit, the belt, mounting hardware, and gear reducer shaft should be inspected at the same time.
Compatible With
Confirmed compatibility is centered on the LiftMaster RSL12V series listed below. Verify by model number, operator generation, and replacement parts diagram.
- LiftMaster RSL12V slide gate operator
- LiftMaster RSL12VH slide gate operator
- Select RSL12V family drive assemblies where K17-35661 is shown on the parts diagram
Features & Specifications
| Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | Gear reducer pulley kit |
| Part Number | K17-35661 |
| Application | Low-voltage slide gate operator drive system |
| Compatible Operator Type | Slide gate operator |
| Included Components | Gear reducer pulley kit components as supplied by LiftMaster |
| Related Component References | K17-50095 gear pulley and K17-50098 motor pulley may appear as related individual pulley references |
| Notes | Verify with RSL12V / RSL12VH parts diagram before ordering |
Also Known As / Related Part Numbers
- K17-35661
- 17-35661
- LM-K17-35661
- K17-50095
- K17-50098
Technician Note
If the original pulley failed because the belt was overtightened or misaligned, correct the root cause before installing the replacement kit. Belt tension that is too tight can shorten pulley, bearing, and gear reducer life.
Before Ordering
- Confirm the operator is RSL12V or RSL12VH
- Compare the original pulley kit to the parts diagram
- Inspect the drive belt for cracking, glazing, or missing teeth
- Check gear reducer shaft play and motor mount alignment
- Do not substitute CSL24 or RSL12U pulley kits for RSL12V without confirmation
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
Does K17-35661 fit the RSL12V?
Yes, K17-35661 is commonly listed for LiftMaster RSL12V slide gate operators.
Does this fit the RSL12VH?
Yes, RSL12VH is also listed with this pulley kit in compatibility references.
Is this the same as K17-36530?
No. K17-36530 is associated with CSL24 series slide gate operators. K17-35661 is for the RSL12V / RSL12VH family.
Why would this pulley kit need replacement?
Common reasons include worn pulley grooves, belt tracking problems, loose hardware, vibration, noise, or visible pulley damage.
They are related pulley references seen with this pulley family, but they should only be ordered separately if the exact parts diagram confirms them for your operator.
