High Precision Swing Motor Gearbox DX80 Hydraulic Motor Reduction Gearbox
Price:
Negotiable
MOQ:
1 Pc
Delivery Time:
5-7 Days
Product Description
Excavator Swing Drive Motor DX80 Hydraulic Swing Reduction Assembly Gearbox
As a key transmission component, the swing reducer (commonly called swing gearbox) of an excavator links the slewing motor to the large slewing gear ring. Its core purpose is to lower speed and raise torque, achieving smooth full‑circle 360° rotation of the upper structure.
Main Structural Layout
Sun Gear: Matched with slewing motor splines, it imports high‑speed power energy.
Planet Gears: 3‑4 gears for every stage, rotating circumferentially around and axially on the sun gear for torque transmission.
Ring Gear: Permanently fixed to the housing and meshes with the planet gear assembly.
Planet Carrier: Provides power output to drive the lower small driving pinion.
Brake: Built‑in wet multi‑disc braking unit, spring‑activated engagement and hydraulic‑driven release, preventing backward rotational movement.
Housing & Bearings: High‑strength cast/forged steel housing structure, supported by heavy‑duty bearings, dust‑resistant and leakage‑preventive.
Planet Gears: 3‑4 gears for every stage, rotating circumferentially around and axially on the sun gear for torque transmission.
Ring Gear: Permanently fixed to the housing and meshes with the planet gear assembly.
Planet Carrier: Provides power output to drive the lower small driving pinion.
Brake: Built‑in wet multi‑disc braking unit, spring‑activated engagement and hydraulic‑driven release, preventing backward rotational movement.
Housing & Bearings: High‑strength cast/forged steel housing structure, supported by heavy‑duty bearings, dust‑resistant and leakage‑preventive.
Power with high rotational speed and low torque from the hydraulic motor is conveyed via the sun gear, first‑stage and second‑stage planetary gear groups to the output planet carrier. The pinion gear rotates slowly with high torque output, meshing with the inner gear ring of the slewing bearing to drive upper‑body slewing movement.
Typical Malfunction Types & Root Causes
- Irregular noise / Stuttering operation status: Gear surface wear and pitting defects, bearing functional failure, inadequate or polluted lubrication medium, improper meshing clearance of gears.
- Oil infiltration and leakage failures: Worn oil seal components, housing crack damages, overfilled lubricant level height, clogged ventilation breather port.
- Torpid or insufficient‑power slewing performance: Worn gear and bearing components, incomplete brake release mechanism, hydraulic motor internal leakage bypass, mismatched reduction transmission ratio.
- Excessive temperature rise condition: Low oil content or degraded lubricant properties, overload working operation, brake drag resistance friction, insufficient heat emission efficiency.
- Gear slipping / Tooth breakage failures: Sudden impact loading forces, foreign object intrusion into gearbox, fatigue‑caused deterioration wear, shaft alignment deviation during assembly procedure.
| Machinery Test Report | Provided | Warranty | 3 Months |
| Video outgoing-inspection | Provided | Brand Name | OEM |
| Place of Origin | China | Part Name | Swing Reduction Assembly |
| Model | DX75 DX80 | Keyword | Swing Gearbox |
| MOQ | 1 Piece | Quality | Tested Great Performance |
| Application | Excavator | Delivery Time | 7-35 Days |
| Service | Professsional Service | Condition | Brand New |
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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