China Swing Reduction Gear Supplier for Excavators
Find the swing reduction gear that matches your excavator, without replacing a usable swing motor unnecessarily.
Send the machine model, part number, nameplate, or photos of the old gearbox, and we check the available replacement route before quotation.
- Complete swing reduction gearbox options
- Gearbox-only matching for excavator applications
- Selected planetary gears, carriers, shafts, bearings, and related parts
- One-piece replacement and repeat supply inquiries
Not sure whether you need the gearbox, swing motor, or complete swing drive? Send a photo of the full unit and tell us what happened before the failure.
Gearbox Only
Match by Part Number
Checked Before Quotation
Model Confirmation First
Everything You Need to Source a Swing Reduction Gear
Use the sections below to identify the component, prepare matching information, compare supply options, and send a complete inquiry.
Replacement Challenges
Why brand alone is not enough to quote.
Supply Solutions
Start with the information you already have.
Know What You Need
Gearbox, motor, or complete swing drive.
Matching Guide
Five details that speed up model checking.
Excavator Applications
Mini, standard, large, and wheeled machines.
Brand & Model Coverage
Check by brand, model, and part number.
Supply Options
Choose the supply scope that fits the repair.
Confirmation Process
From identification to a clear quotation.
Installation Checks
Check the system before the new gearbox goes in.
Old & Discontinued Models
Routes when the original is hard to source.
Flexible Order Quantities
One replacement or repeat supply.
Products We Supply
Find gears by machine or reference number.
Quality Confirmation
Confirm the product you are actually ordering.
Why Work With Us
A clearer route from old unit to replacement.
Export Packing
Protect gearbox, interfaces, and pinion in transit.
Warranty Support
Keep identification and installation evidence.
FAQ
Selection, replacement, and repair questions.
Send Your Inquiry
Send details, get model checking & a quote →
A Swing Gearbox Can Look Right and Still Be Wrong
Two swing reduction gears may look similar while using different mounting patterns, input splines, reduction stages, output shafts, pinion teeth, or internal configurations. Confirming only the excavator brand is rarely enough for a responsible quotation.
Internal wear is not visible from the outside
Internal damage is not visible from the outside
Broken gear teeth, worn bearings, carrier damage, shaft wear, contaminated oil, or damaged seals may only become clear after disassembly. Share teardown photos when you are looking for repair parts rather than a complete assembly.
The model has more than one configuration
Same series can use different swing assemblies by year, serial range, or component supplier.
The old label is missing
Oil, corrosion, or repainting can hide the number. Casting marks and dimensions may still give a route.
The fault may not be inside the gear
Slow swing, noise, or leakage can involve the motor, brake, valve, circuit, or bearing. Describe the symptom.
A full drive is quoted when only the gearbox is needed
If the motor is serviceable, a gearbox-only replacement may cut unnecessary cost.
Not Sure Which Component Failed?
Send a photo of the full unit and describe what happened before the failure. We check whether the inquiry is for the gearbox, swing motor, or complete swing drive before quoting, so you compare the correct product.
Start With What You Already Know
You do not need a complete technical drawing before contacting us. Choose the route that matches the information available, and we will tell you what else is needed for the next check.
You have the gearbox part number
Send the full number exactly as stamped, with the excavator model. A photo helps, since one missing digit or prefix can point to a different assembly.
You only know the excavator model
Send the brand, full model, serial number if available, and photos of the installed swing unit. We check whether the machine uses more than one gearbox configuration.
You have the old gearbox but no readable number
Photograph the housing, mounting flange, motor interface, output pinion, bolt pattern, and any casting marks. We may then request measurements or tooth counts.
You need internal parts
Send teardown photos and identify the damaged items. Include gear tooth counts, bearing codes, shaft dimensions, and mating-part photos where possible.
You need an alternative for an unavailable unit
Send all known numbers and dimensions. Depending on the model, we can check a current replacement, compatible gearbox, repair-parts route, or complete swing drive alternative.
Choose your matching route
Tell us which situation matches yours and we will send the exact checklist for the next step.
Swing Reduction Gear, Swing Motor, or Complete Swing Drive?
These names are often mixed in quotations. Confirming the supply boundary before pricing helps you compare the correct products.
| Component | What It Includes | Choose This When | What to Confirm |
|---|---|---|---|
| Swing Reduction Gear / Gearbox | Reduction housing, planetary gear sets, carriers, shafts, bearings, output pinion, and related mechanical parts; contents vary by model | The gearbox is damaged but the hydraulic motor can be reused | Motor-to-gearbox interface, mounting pattern, output pinion, reduction configuration |
| Swing Motor | Hydraulic motor and model-specific brake or valve components; assembly varies | Hydraulic testing points to a motor-side fault and the gearbox is serviceable | Motor model, ports, displacement, brake/valve arrangement, gearbox interface |
| Complete Swing Drive | Matched motor and reduction gearbox assembly | Both sections are damaged, the interface is uncertain, or an assembled replacement is preferred | Complete assembly number, machine model, installation space, hoses/ports, output interface |
| Swing Bearing / Slewing Ring | Large ring bearing connecting the upper structure and undercarriage | Inspection shows ring gear, raceway, bolt, or bearing play damage | Bearing number, dimensions, hole pattern, gear details |
If you are unsure, send one photo showing the complete installed unit and another showing the disassembled area. We first confirm which product category should be quoted.
Five Details That Make Model Checking Faster
The more complete the identification package, the less time is spent comparing uncertain alternatives. Start with the first two items and add the rest when the number is missing or ambiguous.
Machine identity
Excavator brand, full model, serial number, and production year when known. Avoid shortened model names that omit series or suffix letters.
Part and assembly numbers
Photograph every readable label, stamped code, casting number, or invoice reference. Tell us whether it belongs to the gearbox, motor, or complete assembly.
Full-unit photos
Clear photos from the top, side, motor interface, mounting flange, and output pinion side. Place the removed gearbox on a clean surface.
Interface and pinion details
When numbers are unavailable, we may ask for mounting hole count and spacing, pilot diameter, height, input spline, output shaft dimensions, and pinion tooth count.
Required supply scope
State whether you need a complete gear, gearbox without motor, complete swing drive, or internal parts. Include quantity and destination country.
Photo Tips
Clean the label and stamped areas without grinding or repainting them.
Use natural light and keep numbers in focus.
Include one full-unit photo before taking close-ups.
Place a ruler beside dimensions, but also write the measured value.
Do not send only a screenshot of another supplier's product unless it is the exact unit.
Swing Reduction Gears for Construction Machinery
The focus of this page is the swing mechanism that rotates an excavator's upper structure. Model availability can be checked for different machine sizes and duty conditions, but the exact gearbox must be confirmed from the machine and component information.
Mini and compact excavators
Small housings and closely integrated assemblies make accurate model identification especially important. Send clear installation photos before removing or separating components when possible.
Standard crawler excavators
These machines account for many common replacement inquiries, but a familiar model name may still have multiple swing gearbox numbers. Use the assembly number whenever available.
Large excavators and heavy-duty applications
Higher torque, unit weight, packing requirements, and installation handling require additional confirmation. Provide the full machine serial information and ask for lifting, oil, and installation documents when needed.
Wheeled excavators and special machines
Configuration can differ from a crawler model with a similar name. Send the complete machine designation and old unit details rather than matching by excavator tonnage alone.
Check by Machine Brand, Model, and Part Number
We can review swing reduction gear inquiries for a range of excavator brands and component families. Brand matching is only the starting point; the final selection should be tied to the specific machine and assembly details.
Useful references for checking
Excavator model and serial range
Swing machinery assembly number
Reduction gearbox part number
Swing motor model
Previous supplier or invoice number
Photos of the old unit and mounting interfaces
Do not see your brand listed?
Send the information you have. We confirm whether there is a checkable supply route rather than assuming compatibility from appearance.
Send Your Gearbox Details, Get Model Checking First
Send the machine model, part number, nameplate, or old unit photos. We check the configuration and confirm the supply scope before sending pricing, so the quotation matches the actual product.
Choose the Supply Scope That Fits the Repair
The lowest product price is not always the lowest repair cost. Compare what is included, what can be reused, and how much confirmation is possible before choosing an option.
Complete swing reduction gearbox
When the mechanical assembly is damaged and the motor has been checked for reuse. Confirm the input interface and whether seals, bearings, pinion, and hardware are included.
Complete swing drive assembly
When both motor and gearbox need replacement, or a matched assembled unit reduces interface uncertainty. Confirm hydraulic ports, valve configuration, and assembly number.
Internal gearbox parts
For workshops that can inspect and rebuild. May include sun gears, planetary gears, carriers, ring gears, shafts, pinions, bearings, seals, and housings, depending on the model.
New, genuine, or remanufactured routes
Available routes differ by part number. Ask us to state the proposed condition and source clearly. These descriptions should not be treated as interchangeable.
| Option | Often Considered When | Confirm Before Ordering |
|---|---|---|
| New replacement gearbox | You need a complete mechanical assembly with a practical replacement budget | Manufacturer, included parts, compatibility basis, inspection documents |
| Genuine or original-brand part | Brand traceability or exact original supply is required | Packaging, label, source, actual availability, part-number supersession |
| Remanufactured unit | A new unit is unavailable or repair economics favor a rebuilt assembly | Core condition, replaced parts, test scope, warranty terms, return-core requirement |
| Internal repair parts | Your workshop can measure, rebuild, and verify the gearbox | Tooth count, dimensions, mating components, material/heat-treatment documentation if available |
From Identification to a Clear Quotation
Our checking process is designed to make the quotation specific enough for you to compare the actual product, not just a similar-looking photo.
Send the known details
Machine model, part number, photos, required supply scope, quantity, and destination.
Identify the component boundary
We confirm whether the inquiry is for the gearbox, swing motor, complete swing drive, or internal parts.
Compare model references
Available numbers, housing details, interfaces, pinion, and machine application are checked against the proposed product.
Resolve missing information
If several configurations remain possible, we request specific photos, dimensions, tooth counts, or serial information instead of guessing by appearance.
Confirm the proposed option
Review product description, condition, included components, reference numbers, photos, quantity, packing basis, lead time, and warranty terms.
Pre-shipment confirmation
For the ordered unit, confirm the agreed identification and inspection records before packing and shipment.
Check the System Before the New Gearbox Goes In
A replacement swing reduction gear should not be installed as an isolated part of the repair. Damage elsewhere in the swing system can shorten the life of the new unit or leave the original symptom in place.
Before installation
- Check the swing motor output and interface for wear or damage.
- Inspect the swing bearing ring gear and pinion engagement area.
- Remove metal debris, contaminated oil, and damaged fragments.
- Confirm mounting surfaces, bolts, dowels, seals, and hoses.
- Compare the old and replacement units before lifting into position.
During assembly
- Follow the service manual for lifting, alignment, torque, sealant, and sequence.
- Use the specified lubricant type and fill quantity for the exact model.
- Do not force mismatched splines, bolt holes, or pilot surfaces.
- Verify pinion engagement and free movement per the procedure.
During initial operation
- Start with a controlled inspection and listen for abnormal noise.
- Check for leakage, heat, vibration, irregular movement, and play.
- Stop the machine if the symptom suggests incorrect installation.
- Record photos, video, operating conditions, and oil condition if support is required.
The correct procedure depends on the excavator and gearbox model. Use the applicable service documentation and qualified technicians for installation.
When the Original Swing Gearbox Is Difficult to Source
An old part number does not automatically identify a current replacement. Superseded numbers, previous repairs, mixed assemblies, and incomplete records can all change the route.
We may check one or more of the following options after reviewing the old unit:
A current number that supersedes the original reference
A compatible replacement gearbox with confirmed interfaces
A complete swing drive when separate gearbox matching is uncertain
Selected internal parts for workshop rebuilding
A remanufactured unit, when available and suitable
Dimensional comparison for a special or poorly documented application
Send the old part number, complete machine details, teardown photos if available, and all critical dimensions. Keep the old unit for comparison or as a rebuild core.
Confirm the Model First, Then Plan the Quantity
Whether you need one urgent replacement or repeat wholesale supply, the exact configuration is confirmed before quantity planning, so every unit on the order matches the machine.
One Replacement or Repeat Supply
Whether you are repairing one machine or purchasing for regular parts sales, the model must be confirmed before quantity planning.
One-piece and urgent replacement
Send the exact unit details and destination first. We check the applicable option, current availability, and shipping basis for the requested quantity.
Small batches for workshops and dealers
Provide a list with part numbers, machine models, quantities, and preferred condition. Mixed-model inquiries are easier when each line includes its own reference photos.
Repeat and wholesale supply
For recurring models, ask about stable identification records, packaging labels, batch inspection information, and reorder references. Forecast quantities help distinguish repeat demand from a one-time request.
Find Swing Reduction Gears by Machine or Reference Number
Use the product list to locate a known model, then send the old unit details for final checking. Product cards show factual reference information and do not imply live stock.
Gearbox Only
{Swing Reduction Gear Product 01}
- Ref:
- {Part Number}
- Machine:
- {Excavator Brand and Model}
- Scope:
- {Gearbox Only / Complete Drive / Internal Parts}
- Confirm:
- {Output Pinion / Mounting / Input Interface}
Complete Drive
{Swing Reduction Gear Product 02}
- Ref:
- {Part Number}
- Machine:
- {Excavator Brand and Model}
- Scope:
- {Gearbox Only / Complete Drive / Internal Parts}
- Confirm:
- {Output Pinion / Mounting / Input Interface}
Internal Parts
{Swing Reduction Gear Product 03}
- Ref:
- {Part Number}
- Machine:
- {Excavator Brand and Model}
- Scope:
- {Gearbox Only / Complete Drive / Internal Parts}
- Confirm:
- {Output Pinion / Mounting / Input Interface}
Gearbox Only
{Swing Reduction Gear Product 04}
- Ref:
- {Part Number}
- Machine:
- {Excavator Brand and Model}
- Scope:
- {Gearbox Only / Complete Drive / Internal Parts}
- Confirm:
- {Output Pinion / Mounting / Input Interface}
Cannot find your reference in the list? Send the part number and machine details, and we check it manually.
Confirm the Product You Are Actually Ordering
Quality assurance begins with correct identification. Inspection of a well-made but incorrectly matched gearbox cannot make it suitable for the machine.
Depending on the product type and order, the available confirmation record may include:
- Product and packaging photos
- Part-number, label, or casting-mark check
- Visual inspection of housing, interfaces, and output pinion
- Dimensional checks for agreed critical points
- Rotation or assembly checks where applicable
- Oil, seal, or leakage checks where applicable
- Packing label and quantity confirmation
- Supplier material, process, or test records when available
Ask which checks apply to the quoted unit. Test scope differs between a new complete gearbox, an internal gear part, and a remanufactured assembly.
A Clearer Route From Old Unit to Replacement
The value of a swing reduction gear supplier is not measured by the length of a model list. It is measured by how clearly the proposed product is identified, described, checked, and prepared for your order.
Component-boundary checking
We first separate gearbox, swing motor, complete swing drive, and swing bearing inquiries so you do not compare different assemblies under the same name.
Order-specific confirmation
Product condition, included components, identification basis, inspection scope, packing, and warranty terms are stated for the quoted option.
Export-order preparation
Heavy gearbox packing, labels, document references, and shipment details are coordinated according to the product and destination requirements.
Multiple identification routes
Part number, machine model, label, casting mark, full-unit photos, interfaces, and pinion details can all contribute when one reference is incomplete.
Supply-scope options
We can check complete gearboxes, complete swing drives, and selected internal parts instead of forcing every repair into one route.
Repair-focused communication
Workshops can send teardown evidence, tooth counts, bearing codes, and dimensions. Owners can start with the machine model and clear photos.
Protect the Gearbox, Interfaces, and Output Pinion in Transit
Swing reduction gears are dense mechanical assemblies. Packing should control movement, protect machined interfaces, keep dirt and moisture away from openings, and make the package easy to identify on arrival.
The packing plan may include:
- Protection for splines, ports, mounting faces, and the output pinion
- Sealed wrapping or moisture protection appropriate to the shipment
- Stable internal blocking to prevent movement inside the case
- A reinforced carton, pallet, or wooden case for the unit weight
- Product label, order reference, quantity, and package marks
- Photos of the product and closed package before dispatch
Tell us if your destination requires fumigation-compliant wood packaging, special marks, consolidated shipment handling, or a specific label format.
Keep the Identification and Installation Evidence
Warranty terms depend on the quoted product condition, supplier policy, and order agreement. Ask for the applicable period, scope, exclusions, and claim procedure before placing the order.
Before ordering
Ask for the applicable warranty period, scope, exclusions, and claim procedure for the quoted product condition. Terms differ between a new gearbox, an internal part, and a remanufactured unit.
If a problem occurs
Stop operation when continued use could cause more damage, then send:
Order number and product reference
Machine model and installation date
Operating hours since installation
Photos and video showing the symptom
Installation, lubricant, and initial-operation information
Inspection findings from motor, circuit, and bearing
The evidence is used to separate product, installation, lubrication, contamination, and connected-system factors. Do not disassemble or modify the unit during a claim unless the agreed support process asks you to.
Send the Details You Have. We Tell You What Is Missing.
You can start with a part number or a few clear photos. For a faster check, include the full machine model, required supply scope, quantity, and destination.
Hi, I'm Jeason.
I handle swing reduction gear inquiries. Send your machine model, part number, nameplate, or photos of the old unit, and I confirm the exact supply scope with you before quoting.
- Component boundary confirmed before pricing
- Gearbox only, complete drive, or internal parts
- Pre-shipment confirmation before packing
Good photo examples
Full unit on a clean surface, mounting flange and bolt pattern, output pinion side, and any stamped or casting numbers.
Questions About Selection and Replacement
Common questions on identification, supply scope, repair, installation, and quotation. Send your machine details for anything not covered here.
01
Is a swing reduction gear the same as a swing motor?
No. The swing motor converts hydraulic flow into rotary input, while the reduction gearbox uses gears to reduce speed and transmit torque to the swing mechanism. Some suppliers use swing drive or swing machinery for the combined assembly, so confirm exactly what is included in the quotation.
03
What should I send if the nameplate is missing?
Send full photos from several angles, all casting or stamped numbers, the machine model, mounting-hole details, pilot diameter, input interface, output pinion dimensions, and tooth count. We will tell you which measurements are most useful for the next comparison.
05
Can you supply only the internal gears or carrier assemblies?
Selected internal parts may be checked for some gearbox models. Teardown photos, tooth counts, dimensions, bearing codes, and the exact gearbox reference are usually needed because similar housings can contain different internals.
07
Will a new gearbox solve slow or weak swing movement?
Not necessarily. Slow or weak swing can involve the hydraulic motor, brake release, valves, pump flow, pressure, contamination, swing bearing resistance, or mechanical damage. Inspect the connected system before assuming the gearbox is the only cause.
09
Can you check an old or discontinued part number?
Yes, the number can be reviewed, but a current alternative may require additional photos, dimensions, machine information, or the old unit for comparison. Available routes can include a superseding number, compatible gearbox, internal parts, remanufactured unit, or complete drive.
11
How do I compare quotations from different suppliers?
Compare the exact part reference, product condition, included components, compatibility basis, product photos, inspection scope, packing, lead time, warranty terms, and whether the quote is for a gearbox only or a complete swing drive.
02
Can you confirm the gearbox from the excavator model alone?
Sometimes the machine model narrows the search, but it may not identify one exact gearbox. Production year, serial range, swing assembly number, motor model, and old-unit photos may be needed when the model has multiple configurations.
04
Can I buy the swing gearbox without the hydraulic motor?
That depends on the model and whether the existing motor and interface are suitable for reuse. Send the motor model, gearbox number, and interface photos so a gearbox-only route can be checked.
06
Should I replace the complete gearbox or repair the old one?
The decision depends on the damage, parts availability, workshop capability, downtime, and total repair cost. A repair route may suit localized damage with identifiable parts; a complete replacement may be more practical when several major components or the housing are damaged.
08
What should be checked before installation?
Compare the old and new units, inspect the motor interface and swing ring gear, remove debris, confirm alignment and mounting surfaces, use the specified lubricant, and follow the machine service procedure for lifting and fastener torque.
10
What information is needed for a quotation?
Send the excavator brand and model, gearbox or assembly number, required supply scope, quantity, destination country, and clear product photos. Include your condition preference and delivery target if they affect the purchase decision.
12
What evidence should I keep after installation?
Keep the product label, packing list, pre-installation photos, lubricant information, installation date, machine hours, and initial-operation records. These details make later technical or warranty review more useful.
Continue With the Component You Actually Need
If inspection points to another part of the swing or travel system, continue with the matching category below.
Swing Motor
For hydraulic motor, brake, valve, port, and displacement-related matching.
View Swing MotorsComplete Swing Drive
Matched motor-and-gearbox assembly when both sections are required.
View Complete Swing Drives
Swing Gearbox Parts
Gears, carriers, shafts, bearings, seals, housings, and pinions for repair.
View Gearbox PartsSwing Bearing
Slewing ring and ring-gear assembly between upper structure and undercarriage.
View Swing Bearings
Travel Reduction Gear
Planetary gearbox for the excavator travel and final-drive system.
View Travel Reduction Gears
Travel Motor / Final Drive
Track drive motor, travel gearbox, or complete final-drive requirements.
View Travel Drive Products
Hydraulic Pump
Main pump identification, replacement, and related hydraulic supply.
View Hydraulic Pumps
Excavator Gear Parts
Planetary, sun, ring, shaft, carrier, and bearing inquiries across assemblies.
View Excavator Gear Parts