E349D2 Crawler Excavator Parts Final Drive Excavator Travel Reducer Komatsu Hitachi
Price:
Negotiable
MOQ:
1 Pc
Delivery Time:
7-35days
Product Description
E349D2 Crawler Excavator Machinery Parts Final Drive Travel Reduction Gearbox Komatsu Hitachi
In construction machinery engineering, the swing reducer of an excavator (commonly swing gearbox) is an essential transmission module connecting the slewing motor and large slewing gear ring. It mainly achieves speed reduction and torque increase for smooth 360‑degree rotation of the upper equipment structure.
Core Structural Elements
Sun Gear: Connected to slewing motor splines to intake high‑speed power energy.
Planet Gears: 3‑4 gears per stage orbit and spin on the sun gear to transmit torque force.
Ring Gear: Rigidly mounted on the housing casing and meshes with planet gear groups.
Planet Carrier: Outputs driving power to operate the lower small drive pinion gear.
Brake: Internal wet‑style multi‑disc brake locked by springs and released hydraulically to avoid backward rotation.
Housing and Bearings: High‑strength cast/forged steel housing with heavy‑load‑rated bearings, dust‑resistant and leak‑preventive.
Planet Gears: 3‑4 gears per stage orbit and spin on the sun gear to transmit torque force.
Ring Gear: Rigidly mounted on the housing casing and meshes with planet gear groups.
Planet Carrier: Outputs driving power to operate the lower small drive pinion gear.
Brake: Internal wet‑style multi‑disc brake locked by springs and released hydraulically to avoid backward rotation.
Housing and Bearings: High‑strength cast/forged steel housing with heavy‑load‑rated bearings, dust‑resistant and leak‑preventive.
High‑speed low‑torque power from the hydraulic motor is delivered through the sun gear and two‑stage planetary assemblies to the planet carrier. The low‑speed high‑torque pinion meshes with the slewing bearing inner gear ring to drive upper‑body rotational movement.
Typical Malfunctions and Underlying Triggers
- Strange noise and jerky running: Gear abrasion, surface pitting, bearing failure, scarce contaminated lubricant, improper meshing gap.
- Oil seepage and leakage troubles: Worn oil seal parts, housing cracks, overfilled lubricant liquid, clogged air‑vent openings.
- Torpid or power‑short slewing: Worn gear/bearing components, partial brake release, internal hydraulic motor bypass, non‑matching transmission ratio.
- Excessive heat generation: Low oil level, deteriorated lubrication fluid, overload operation, persistent brake friction, ineffective heat emission.
- Gear jumping and tooth damage incidents: Impact load pressures, impurity infiltration, fatigue‑caused wear, installation‑induced shaft misalignment.
| Machinery Test Report | Provided | Warranty | 3 Months |
| Video outgoing-inspection | Provided | Brand Name | OEM |
| Place of Origin | China | Product Name | Excavator Final Drive |
| Product Description | Travel Reduction Gearbox | Quality | OEM Standard |
| Condition | Brand New | Model Number | E349D2 |
| MOQ | 1 Piece | Delivery Time | 5-7 Days |
| Application | Excavator | Packing | Standard Packing |
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Company
Lanzhou Fudong Guangqi Trading Co., Ltd
Location
No. 7 West South Binhe Road, Xigu District, Lanzhou City, Gansu Province, China
Contact Person
Liang