LiftMaster K73-36109 Chassis
The LiftMaster K73-36109 chassis is a replacement frame for select CSW24 Series commercial swing gate operators. The chassis supports the gear reducer, arm drive area, control enclosure relationship, and internal mounting points that keep the swing gate operator aligned under load. If the base frame is bent, cracked, heavily corroded, or damaged around mounting locations, the operator may develop drive binding, cover fit problems, uneven load transfer, or water intrusion. This chassis is intended for rebuilds where the correct CSW24 platform has been identified and the remaining components are serviceable.
For parts-counter accuracy, treat the part number as the primary identifier. LiftMaster gate operator service parts often share similar shapes, mounting points, and hardware names across several product generations, but small differences in shaft length, cabinet footprint, mounting holes, drive geometry, voltage platform, or operator family can make a similar part unusable. This replacement should be selected from the installed operator's model label and the correct exploded parts diagram, not from a general description alone.
Compatible With
LiftMaster CSW24V, CSW24VH, and CSW24DC style swing gate operator applications where K73-36109 is shown in the parts diagram.
- CSW24V swing gate operators
- CSW24VH swing gate operators
- CSW24DC references when confirmed by diagram
Features & Specifications
| Manufacturer | LiftMaster |
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| Product Type | Chassis |
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| Part Number | K73-36109 |
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| Application | Replacement service part for select LiftMaster gate operator assemblies |
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| Compatible Operator Type | Swing gate or slide gate operator, model dependent |
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| Compatible With | LiftMaster CSW24V, CSW24VH, and CSW24DC style swing gate operator applications where K73-36109 is shown in the parts diagram. |
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| Included Components | Replacement chassis frame. |
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| Notes | CSW24 chassis fitment depends on exact model generation. Do not substitute with RSW or CSW200 chassis numbers without diagram confirmation. |
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Also Known As / Related Part Numbers
The following numbers and descriptions may appear in parts diagrams, distributor listings, or customer searches. Related numbers are provided to help identify the correct part, not to claim every number is an exact one-for-one substitute.
- K73-36109
- 73-36109
- LM-K73-36109
Technician Note
CSW24 chassis fitment depends on exact model generation. Do not substitute with RSW or CSW200 chassis numbers without diagram confirmation. When replacing a chassis, shaft, or other core mechanical service part, inspect surrounding hardware, bearings, sprockets, chain path, limit components, covers, seals, and mounting points. A damaged supporting part can cause repeat failure if the original cause is not corrected.
Before Ordering
- Match the operator model number and suffix from the nameplate.
- Compare the original part number with the parts diagram for that exact operator generation.
- Inspect related hardware for damage, wear, corrosion, or missing fasteners.
- Confirm whether the repair involves a slide gate, swing gate, residential, light commercial, or heavy commercial operator platform.
- Do not substitute similar-looking LiftMaster chassis or shaft parts unless the manufacturer parts diagram confirms the match.
Professional Advisory
Gate operators can move heavy gates with significant force. Structural and drive-system repairs should be performed by a qualified gate technician when there is cabinet damage, shaft damage, limit travel trouble, electrical exposure, unsafe movement, or missing safety equipment. After the repair, the operator should be tested for proper travel, secure mounting, smooth movement, and required entrapment protection.
Important Ordering Warning
Several LiftMaster chassis and shaft kits use very similar part numbers. Suffixes such as -1, -2, and -5 are important and may identify a different operator platform. Do not assume interchangeability based only on a partial number or product appearance.
Questions & Answers
What is the LiftMaster K73-36109 used for?
The LiftMaster K73-36109 is used as a replacement chassis for select LiftMaster gate operator service repairs where the original part is damaged, worn, corroded, or no longer supporting the operator correctly.
Which operators are commonly associated with K73-36109?
This part is commonly associated with CSW24V swing gate operators, CSW24VH swing gate operators. Other model references should be treated as verify-by-parts-diagram applications unless the installed operator breakdown lists this exact part number.
Can I order K73-36109 by matching the picture only?
No. Many LiftMaster chassis, shaft, and mechanical service parts look similar. Match the operator model label, part number, mounting layout, and parts diagram before ordering.
What symptoms can point to a failed or damaged chassis?
Possible symptoms include loose or shifting components, poor gate movement, binding, unusual noise, uneven cover fit, damaged mounting points, corrosion, or visible frame/shaft damage.
Should this part be installed by a technician?
Professional installation is recommended. These parts can affect alignment, travel limits, chain path, arm geometry, or high-load gate movement, and the operator should be tested with all required safety devices after service.
