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Swing Reduction Slewing Gearbox Device Without Motor 9148921 For EX100-5 EX110-5 EX120-5 EX130H-5 Hitachi Excavator Original Reducer Gear Parts
Place of Origin:Japan
Brand Name:Hitachi
Certification:ISO9001 / 2006/42/EC
Model Number:EX100-5 EX110-5 EX120-5 EX130H-5
Minimum Order Quantity:1 piece
Price:Negotiable price
Payment Terms:T/T,Paypal and Trade Assurance,L/C,D/A,D/P
Supply Ability:1000pieces
Product Details
Highlight:
9148921 Excavator swing reduction
,EX120-5 slewing gear box
,EX120-5 Excavator swing reduction
Model Name:
EX100-5 EX110-5 EX120-5 EX130H-5
Part Name:
9148921
Quality:
Original New
Brand:
Hitachi
MOQ:
1PC
After-Sales Services:
Online
Condition:
New
Transportation:
Sea / Air / Express Delivery
Product Description
Excavator swing reduction EX120-5 slewing device 9148921 excavator gearbox
Product Description
| Appliion | Excavator |
| Part name | Swing Reduction Slewing Gearbox Device Without Motor |
| Part number | EX100-5 EX110-5 EX120-5 EX130H-5 |
| Model | 9148921 |
| MOQ | 1PC |
| Warranty | 12 months |
| Payment term | T/T, PayPal |
| Delivery | 1 day after the payment received |
| Shipment | By sea, by air, by express, or as required |
List of Spare Parts
| # | Part No | Part Name | Qty. |
|---|---|---|---|
| 01 | 2036830 | SHAFT; PROP. | 1 |
| 01 | 2028036 | SHAFT; PROP. | 1 |
| 02 | 4244693 | SLEEVE | 1 |
| 03 | A811100 | O-RING | 1 |
| 04 | 4248609 | BRG.; SPH. ROL. | 1 |
| 06 | 4244691 | SEAL; OIL | 1 |
| 06 | 4424512 | SEAL; OIL | 1 |
| 07 | 4247567 | O-RING | 1 |
| 08 | 3058620 | COVER | 1 |
| 09 | 1020380 | HOUSING | 1 |
| 11 | J011035 | BOLT; SEMS | 8 |
| 12 | 4293424 | BRG.; SPH. ROL. | 1 |
| 13 | 991350 | RING; RETAINING | 1 |
| 14 | 2036804 | CARRIER | 1 |
| 16 | 4258089 | PLATE; THRUST | 1 |
| 17 | 9742788 | GEAR; PLANETARY | 3 |
| 18 | 4266255 | PLATE; THRUST | 6 |
| 19 | 4337638 | PIN | 3 |
| 21 | 4116308 | PIN; SPRING | 6 |
| 22 | 2036811 | GEAR; RING | 1 |
| 23 | M341440 | BOLT; SOCKET | 12 |
| 24 | 3069697 | GEAR; SUN | 1 |
| 25 | 3069725 | GEAR; PLANETARY | 3 |
| 26 | 2036832 | CARRIER | 1 |
| 27 | 4176070 | PLATE; THRUST | 1 |
| 29 | 4269480 | PLATE; THRUST | 6 |
| 30 | 4330377 | BRG.; NEEDLE | 3 |
| 32 | 4337637 | PIN | 3 |
| 35 | 3069727 | GEAR; SUN | 1 |
| 36 | 8050210 | PIPE | 1 |
| 37 | 94-2012 | PLUG | 1 |
| 60 | 8065302 | COVER (FOR TRANSPORTATION) | 1 |
| 61 | J011050 | BOLT; SEMS (FOR TRANSPORTATION) | 8 |
| 62 | 94-2011 | PLUG (FOR TRANSPORTATION) | 1 |
| 100 | 4330219 | MOTOR; OIL | 1 |
| 102 | 927488 | RING; RETAINING | 1 |
| 104 | 4264452 | PIPE | 1 |
| 106 | 4255227 | PIPE | 1 |
| 107 | 4298608 | CAP | 1 |
| 108 | 3053093 | NAME-PLATE | 1 |
| 109 | M492564 | SCREW; DRIVE | 2 |
| 110 | M341025 | BOLT; SOCKET | 7 |
| 111 | 3074223 | GAUGE; LEVEL | 1 |
| 200 | 9148921 | SWING DEVICE (WITHOUT MOTOR) | 1 |
1.Basic Info
- Product: Swing Reduction Slewing Gearbox Device Without Motor
- OEM Numbers: 9148921
- Compatible Models: Hitachi EX100‑5, EX110‑5, EX120‑5, EX130H‑5
- Application: Excavator Original Reducer Gear Parts
- Condition: Original New
- Note: Unit supplied without swing hydraulic motor
2.Core Advantages
- OEM‑matched gear geometry guarantees smooth meshing with swing circle
- Heat‑treated planetary gears resist impact load during frequent slewing cycles
- Tight tolerance on spline and flange reduces vibration during rotating operation
- Drop‑in replacement, preserves original slewing performance after service
3.Technical Data
- Assembly Type: Two‑stage planetary slewing reduction gearbox
- Function: Decelerate swing motor output speed and generate high torque for upper‑structure rotation
- Internal Components: Planet gears, sun gear, ring gear, carrier assembly, multi‑disc parking brake unit
- Lubricant: Industrial gear oil ISO VG220
- Rated Output Torque: OEM standard torque for 10‑13 ton excavator platform
- Allowable Max Slewing Pressure: 27.5 MPa
- Brake Type: Spring‑applied, hydraulic‑released multi‑disc parking brake built‑inside housing
- Mounting Interface: Original mounting flange, bolt pitch circle and spline dimension
- Output Pinion: Hardened pinion with OEM tooth profile for swing gear ring engagement
- Bench Test Content: No‑load rotation check, brake holding test, gear noise and backlash inspection
- Weight: 83kg approx
4.FAQ
Q1: Can I reuse my existing old swing motor for this gearbox?
A1: Compatible with original matched motor, verify spline dimension and mounting interface before fitting.
Q2: Which maintenance work should be done after installation?
A2: Fill specified gear oil fully, check oil level periodically, inspect backlash of swing gear ring.
Q3: What causes swing gearbox abnormal noise?
A3: Usually insufficient lubrication, worn pinion or damaged planetary gear parts.
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