Liftmaster K73-37199, CHASSIS, SL3000
The LiftMaster K73-37199 is the main chassis replacement kit for the SL3000 Series commercial slide gate operator platform. In the field, the chassis is the structural base that keeps the drive system, electrical box, cover hardware, chain path, and related internal assemblies positioned correctly. A damaged or badly corroded chassis can cause more than cosmetic problems. It can affect sprocket alignment, chain tracking, limit switch relationship, service-panel fit, and the way the operator mounts to the pad or post hardware. This part is normally ordered when the original SL3000 chassis has been physically damaged, heavily rusted, modified in the field, or stripped during a larger rebuild. Because the SL3000 family has several generations and UL-related revisions, this chassis should be matched to the original operator model and parts breakdown, not just the outside appearance of the cabinet.
Compatible With
This compatibility list is based on common LiftMaster service-part references. Final fitment should be verified by the operator model, generation, configuration code, and parts diagram.
- SL3000 commercial slide gate operators
- SL3000U slide gate operators
- SL3000UL slide gate operators
- Select LiftMaster / Elite SL3000 Series perimeter access slide gate systems when confirmed by parts diagram
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster / Chamberlain Group |
| Product Type | Chassis replacement kit |
| Part Number | K73-37199 |
| Application | SL3000 Series commercial slide gate operator structural replacement |
| Compatible Operator Type | Commercial slide gate operator |
| Common Model References | SL3000, SL3000U, SL3000UL |
| Notes | Match by model, generation, and parts diagram before ordering. |
Also Known As / Related Part Numbers
These numbers and phrases are related search references or catalog variations. Similar references should not be treated as direct replacements unless the parts diagram confirms the match.
- K73-37199
- 73-37199
- K7337199
- LM-K73-37199
- Chassis, SL3000
- SL3000 chassis kit
Technician Note
Match this part to the original operator parts diagram before ordering. Barrier gate, slide gate, swing gate, and access-control service parts can look similar while using different mounting points, wiring layouts, suffix codes, voltage requirements, or generation-specific hardware.
Before Ordering
- Confirm the manufacturer part number on the original part or parts diagram.
- Verify the exact operator model and model suffix.
- Check serial range, generation, voltage, and configuration when applicable.
- Compare connector layout, mounting style, harness length, and included components.
- For electrical assemblies, shut off power and use a qualified technician for installation.
Professional Advisory
Do not bypass required safety devices or modify wiring to make an incorrect part fit. If the operator has high-voltage wiring, damaged conductors, water intrusion, or unsafe gate movement, have the system inspected by a qualified gate technician before returning it to service.
Product Questions & Answers
Is K73-37199 the complete SL3000 gate operator?
No. K73-37199 is the replacement chassis component. It is not a complete operator and does not include the full drive system, control board, motor, or external accessories unless specifically supplied with the service kit.
Which SL3000 models commonly use this chassis?
This chassis is commonly associated with LiftMaster and Elite SL3000, SL3000U, and SL3000UL commercial slide gate operators. Final fitment should be checked against the operator parts diagram.
When should the chassis be replaced?
A chassis is usually replaced when the original frame is bent, corroded, damaged from impact, or no longer holding mechanical and electrical assemblies in proper alignment.
Can this chassis be used on other LiftMaster slide gate operators?
It should not be treated as universal. Similar slide gate operators may use different cabinets, mounting points, gearboxes, and internal layouts.
Who should install this chassis?
A qualified gate technician is recommended because the operator may need mechanical realignment, electrical component transfer, and safety system testing after the chassis is replaced.
