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Home > Products > Excavator Machinery Parts >
E349D2 Crawler Excavator Parts Final Drive Excavator Travel Reducer Komatsu Hitachi

E349D2 Crawler Excavator Parts Final Drive Excavator Travel Reducer Komatsu Hitachi

E349D2 Crawler Excavator Parts

Final Drive Excavator Travel Reducer

E349D2 Excavator Travel Reducer

Place of Origin:

China

Model Number:

E349D2

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E349D2 Crawler Excavator Parts Final Drive Excavator Travel Reducer Komatsu Hitachi E349D2 Crawler Excavator Parts Final Drive Excavator Travel Reducer Komatsu Hitachi
Product Details
Machine Model:
E349D2
Part Name:
Travel Motor Reduction Gearbox
Warranty:
3 Months
Catagory:
Excavator Spare Parts
Color:
Metallic
Application:
Excavator E349D2
Highlight:

E349D2 Crawler Excavator Parts

,

Final Drive Excavator Travel Reducer

,

E349D2 Excavator Travel Reducer

Payment & Shipping Terms
Minimum Order Quantity
1 Pc
Packaging Details
Carton
Delivery Time
7-35days
Payment Terms
T/T
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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.
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 ReportProvidedWarranty3 Months
Video outgoing-inspectionProvidedBrand NameOEM
Place of OriginChinaProduct NameExcavator Final Drive
Product DescriptionTravel Reduction GearboxQualityOEM Standard
ConditionBrand NewModel NumberE349D2
MOQ1 PieceDelivery Time5-7 Days
ApplicationExcavatorPackingStandard Packing

E349D2 Crawler Excavator Parts Final Drive Excavator Travel Reducer Komatsu Hitachi 0Company Profile

E349D2 Crawler Excavator Parts Final Drive Excavator Travel Reducer Komatsu Hitachi 1

E349D2 Crawler Excavator Parts Final Drive Excavator Travel Reducer Komatsu Hitachi 2

E349D2 Crawler Excavator Parts Final Drive Excavator Travel Reducer Komatsu Hitachi 3

Tags：

Excavator Spare Parts

Construction Machinery Parts

Crawler Excavator Parts

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