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{"title":"ZX850-3 M2X210 Swing Motor Assy , 4637117 Hydraulic Slew Motor","imgUrl":"https:\/\/img.chinax.com\/nimg\/a4\/0e\/fe4065d66c0f76b57cea8093a876-200x200-1\/zx850_3_m2x210_swing_motor_assy_2c_4637117_hydraulic_slew_motor.jpg","attrs":{"Brand Name":"Belparts","Model Number":"ZX850-3 M2X210CHB","Certifiion":"OEM","Place of Origin":"Guangdong, China"}}
{"title":"4651137 M5X130 Swing Drive Motor For ZX670LC-6 Excavator","imgUrl":"https:\/\/img.chinax.com\/nimg\/e2\/19\/0011072144801be7030b87e2445e-200x200-1\/4651137_m5x130_swing_drive_motor_for_zx670lc_6_excavator.jpg","attrs":{"Brand Name":"Belparts","Model Number":"ZX670LC-6 M5X130CHB-10A-50C-300","Certifiion":"OEM","Place of Origin":"Guangdong, China"}}
{"title":"Belparts excavator spare parts 31N9-10180 Swing reduction gear R320LC-7 swing","imgUrl":"https:\/\/img.chinax.com\/nimg\/59\/56\/428a571c37e8a1a3d760c07e7663-200x200-1\/belparts_excavator_spare_parts_31n9_10180_swing_reduction_gear_r320lc_7_swing_gearbox_for_hyundai.jpg","attrs":{"Brand Name":"Belparts","Model Number":"R320LC-7","Certifiion":"OEM","Place of Origin":"Guangdong, China"}}
{"title":"2003373 Swing Hydraulic Motor Fit Excavator E330D","imgUrl":"https:\/\/img.chinax.com\/nimg\/b2\/8b\/1149c553ea5c127a756251a9fedc-200x200-1\/2003373_swing_hydraulic_motor_fit_excavator_e330d.jpg","attrs":{"Brand Name":"Belparts","Model Number":"E330D","Certifiion":"OEM","Place of Origin":"Made in China"}}
{"title":"Steel 21W-26-00020 Swing Motor Assy For Excavator PC75","imgUrl":"https:\/\/img.chinax.com\/nimg\/41\/3e\/ffe8643e266d5dc0b0506ba8da6a-200x200-1\/steel_21w_26_00020_swing_motor_assy_for_excavator_pc75.jpg","attrs":{"Brand Name":"Belparts","Model Number":"PC75","Certifiion":"OEM","Place of Origin":"Guangdong, China"}}
All listed part numbers are iterative supersession revision codes for the same complete swing assembly. Unified mounting flange bolt pattern, output pinion spline specification, hydraulic inlet‑outlet port layout and factory pressure calibration. Genuine original unit supports direct bolt‑on replacement with no modification to revolving platform or hydraulic pipelines required.
Full 360° continuous rotation, perfectly matched to factory hydraulic system for 8‑10 ton JCB midi excavator platform
Mounting PCD, pinion tooth profile and oil‑port position strictly comply with JCB OEM dimensional drawings
Motor housing and gearbox casing are high‑strength cast iron; internal piston shoes, valve plate, planetary gears, carrier and heavy‑load bearings adopt quenched wear‑resistant alloy steel for urban construction, site development and general contracting operations.
3. Internal Structure & Functional Introduction
Axial piston swing motor delivers stable low‑speed high torque to drive upper structure left‑right slewing for digging and material positioning.
Built‑in multi‑disc spring‑applied hydraulic‑release parking brake automatically locks the revolving table when hydraulic pressure drops, preventing free swing on sloped ground.
Two‑stage compact planetary gear set amplifies motor torque, delivering steady slewing output under full bucket load conditions.
Integrated buffer relief valve absorbs hydraulic pressure spikes at swing start‑stop, protecting internal components from pressure‑shock damage.
Compact integrated layout fits the confined installation space of JCB 85Z‑1 / 86C‑1 / 90Z‑1 / 100C‑1 upper revolving frame.
4. Product Advantages
Genuine original Nachi complete swing reducer assembly, 1:1 OEM outer casting dimensions, plug‑and‑play fitment, no cutting or re‑working of hoses, revolving platform or mounting brackets.
Every original swing motor passes full factory hydraulic bench inspection before shipment: swing speed test, pressure stability test, internal leakage test and brake holding torque verification.
Full overhaul spare parts available: complete seal repair kits, piston assemblies, valve plate, planetary gear sets, carrier, bearings and friction brake discs for component‑level maintenance.
Multiple cross‑reference JCB OEM numbers cover four midi‑excavator models, simplifying order processing, stock classification and inventory management for dealers and repair workshops.
Standard 12‑month full warranty for original unit, performance consistent with factory‑installed swing motor assembly.
5. Packaging & Global Delivery Details
Hydraulic oil ports and output pinion are coated with anti‑rust grease and fitted with dust‑proof protective plugs.
Entire swing motor reducer wrapped with moisture‑proof plastic film and secured inside export‑grade solid wooden crate to avoid collision and damp corrosion during long‑distance sea or air transit.
In‑stock original units can be dispatched within 3‑5 working days after order confirmation.
Multiple global shipping solutions available: international air express, sea LCL bulk shipment, overland truck transport for global midi‑excavator aftermarket markets.
6. FAQ
Q: Are 333/W4439, 336/E4311, 336/E4315 mutually interchangeable?A: Yes, these are JCB iterative supersession part numbers for Nachi PCR‑5B‑30A‑FGP‑9407A swing assembly, fully cross‑replaceable for JCB 85Z‑1, 86C‑1, 90Z‑1, 100C‑1.
Q: Does this original swing reducer fit directly on the listed JCB midi excavators?A: Yes, unified OEM mounting dimensions and factory‑calibrated hydraulic parameters support direct bolt‑on installation without extra adjustment or modification.
Q: What is the relation between PCR‑5B‑30A‑FGP‑9407A and JCB OEM part numbers?A: PCR‑5B‑30A‑FGP‑9407A is Nachi original swing motor model designation; 333/W4439, 336/E4311, 336/E4315 are JCB‑assigned OEM part numbers for this full swing motor reducer assembly.
Q: Are overhaul spare parts available for PCR‑5B‑30A‑FGP‑9407A?A: Matching full seal kits, piston shoe assemblies, valve plates, planetary gear carriers and brake friction discs are available for partial overhaul and single‑component replacement work.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter
Year Established:
2013
Total Annual:
$28000000-$41660000
Employee Number:
1200~1300
Ecer Certification：
Verified Supplier
Since 2013
Excavator Hydraulic Parts Manufacturer & Global Supplier Since 2013
Belparts Machinery Limited — Your Trusted Partner in Excavator Hydraulic Parts
Who We Are
Founded in September 2013 and headquartered in Guangzhou, China's premier engineering machinery hub, Belparts ha...
Since 2013
Excavator Hydraulic Parts Manufacturer & Global Supplier Since 2013
Belparts Machinery Limited — Your Trusted Partner in Excavator Hydraulic Parts
Who We Are
Founded in September 2013 and headquartered in Guangzhou, China's premier engineering machinery hub, Belparts ha...
