LiftMaster K16-50094 V-Belt 4L220 Replacement Belt for SL3000 Slide Gate Operators
The LiftMaster K16-50094 is a 4L220 V-belt replacement part for select LiftMaster Elite SL3000 Series slide gate operators. On a slide gate operator, the drive belt is a wear item that transfers power from the motor to the drive components. Over time, the belt can stretch, glaze, crack, fray, slip under load, or lose tension. When that happens, the operator may run while the gate moves poorly, chatter under load, slow down, or fail to move the gate reliably. This part is commonly identified as K16-50094, 4L220, or Elite Q020. Several references tie it specifically to SL3000 Series slide gate operators, including SL3000 1/2 HP applications. It is important not to confuse this 4L220 belt with other V-belts used in different LiftMaster gate operator families. A belt that is close in length but not exact can cause premature wear, poor tensioning, pulley slip, and drive problems. Before replacing the belt, inspect the pulley alignment, motor mount, tension adjustment, drive sprockets, and gate rollers so the new belt is not damaged by an underlying mechanical problem.
Compatible With
This compatibility section is written from the available parts references and should be checked against the operator model label, old part number, and replacement parts diagram before ordering.
- LiftMaster Elite SL3000 Series slide gate operators where K16-50094 is listed
- LiftMaster SL3000 slide gate operator references using the 4L220 V-belt
- SL3000 1/2 HP slide gate operator applications where the parts diagram calls for Q020 / 4L220
- Select SL3000U / SL3000UL-style references only when the exact belt callout matches K16-50094
- Elite Q020 belt service applications by diagram
- Not a substitute for 4L300, Q042, K16-50108, or other V-belt sizes
Also Known As / Related Part Numbers
- K16-50094
- 16-50094
- 4L220
- Q020
- Elite Q020
- SL3000 belt
- V-Belt 4L220
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | Gate operator V-belt |
| Part Number | K16-50094 |
| Application | Drive belt replacement for select SL3000 slide gate operators |
| Compatible Operator Type | Select slide gate operators |
| Belt Size | 4L220 |
| Approximate Belt Dimensions | 1/2 inch width, 22 inch length, 5/16 inch thickness where listed |
| Related Numbers | Q020, 4L220 |
| Notes | Verify belt size and operator diagram before ordering |
Technician Note
A new belt will not correct a gate that is hard to move. Check the gate rollers, chain tension, pulley alignment, motor mount, and drive hardware before assuming the belt was the only problem.
Before Ordering Checklist
- Confirm the operator is an SL3000 Series slide gate operator.
- Match the old belt to 4L220, K16-50094, or Q020.
- Inspect pulleys for rust, burrs, wear, or misalignment.
- Check that the gate rolls freely by hand after proper safety procedures.
- Do not substitute a 4L300 or other belt length for a 4L220 belt.
Professional Advisory
Disconnect power and secure the gate before servicing drive belts. If the belt failed because the gate is binding, the operator may continue to overload and damage parts until the gate hardware is corrected.
Product Questions and Answers
What belt size is K16-50094?
K16-50094 is commonly listed as a 4L220 V-belt.
Which operator commonly uses this belt?
It is commonly associated with LiftMaster Elite SL3000 Series slide gate operators where the parts diagram calls for K16-50094, 4L220, or Q020.
Is K16-50094 the same as Q020?
Yes, Q020 is commonly listed as an alternate Elite reference for the K16-50094 4L220 belt.
Can I use a 4L300 belt instead?
No. 4L300 is a different belt size and is associated with other applications such as K16-50108 / Q042.
What else should I inspect when replacing the belt?
Inspect pulley alignment, gate movement, motor mount tension, drive hardware, and signs of belt dust or slippage.
