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Rotary Reducer 800300438 XCMG Crane

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Product Description: Rotary Reducer 800300438 for XCMG Crane

The Rotary Reducer 800300438 is a genuine OEM planetary gearbox component engineered for the slewing (rotating) mechanism of XCMG cranes, including truck-mounted cranes, all-terrain cranes, and crawler cranes. As the core power transmission unit of the crane‘s slewing system, the rotary reducer converts the high-speed, low-torque output of the hydraulic slewing motor into low-speed, high-torque rotational motion, enabling smooth, powerful, and precise 360° rotation of the crane’s upper structure—including the cab, boom, and load—relative to the fixed undercarriage.

Rotary Reducer Applications Across XCMG Crane Models

The 800300438 rotary reducer is designed for use across multiple XCMG crane platforms, including:

Truck-mounted cranes — QY series (QY50B, QY70K, QY25K, etc.)
All-terrain cranes — XCT series, XCA series
Crawler cranes — XGC series
Truck-mounted crane variants — SQ series hydraulic loading cranes

For the QY70K and QY70K-I truck crane, the slewing system features a planetary reducer and constant closed-type brake with free sliding function, powered by a hydraulic motor and buffer valve fitted in the hydraulic system for smooth control and reliable inching.

1. Primary Rotary Reducer Assembly

Part Number	Part Name / Description
800300438	Rotary Reducer / Slewing Reducer Assembly (行星回转减速机) — Planetary gearbox for crane slewing mechanism

2. XCMG Reducer Seal Kit and Component Parts (Reference Only)

Swing motors and reducers share sealing components across the XCMG lineup. The following part numbers are provided as reference for associated sealing and repair components.

Part Number	Part Name / Description
803599367	ANELLO Seal Ring — 91.8 × 100 × 2mm; precision-engineered for reliable sealing in XCMG construction machinery; used on final drives, swing motors, and hydraulic pumps across XCMG excavators, loaders, and cranes
803197150	ANELLO Seal Ring — 75 × 87 × 12mm; direct factory replacement for final drives, swing motors, and hydraulic pumps across XCMG equipment
803196981	Seal — 75 × 90 × 10mm; genuine XCMG spare part for maintaining operational integrity
860558551	Seal Kit — For XE210 series machinery; complete seal kit including O-rings, backup rings, and seals; net weight 0.13kg
910908766	Seal Kit — For jack down applications; includes all O-rings, backup rings, and dust seals needed for one complete cylinder reseal
860102206	Seal — For 35300 series machinery
860110159	Buckle Seal — For Y00370096 series machinery; replaces 0734401106

3. Reducer Related Reference Numbers (For Cross-Identification)

The following additional part numbers are provided for cross-reference identification purposes. These numbers may represent rotary reducers, swing reducers, or reducer components for other XCMG machinery models.

Part Number	Part Name / Description
800302367	Reducer — CR51A150KC07400; applicable to A1-2004 series machinery; alternative reducer assembly for XCMG equipment
803419714	Swing Motor and Reducer Assembly Parts — Alternative assembly for XCMG mining excavators; associated with 803419541
804001415	Main Pump Assembly Parts — Associated with swing motor and reducer systems
860115256	Differential Assembly — For Z00360196A series machinery; Meichi 82214207; reference for drivetrain components
860100147	Fork — PY180G.13.1-1; for 001210034MP series machinery

4. XCMG Slewing System Component Reference Codes

XCMG parts system uses specific coding for slewing and reducer components:

Code / Reference	Component Description
8602110A — A version	Swing Reduction Gearbox code for XE210W excavator; includes reinforced bearing preload; correct part code eliminates abnormal noise and extends swing circle life

5. Applicable XCMG Crane Models (Reference)

The rotary reducer and its associated components are applicable to the following XCMG crane models:

Model	Tonnage Class	Description / Notes
QY70K / QY70K-I	70-ton	Truck crane; planetary reducer with constant closed-type brake; free sliding function
QY50B	50-ton	Truck crane; 8×4 chassis; Styr WD615.67A engine
QY25K	25-ton	Truck crane; 6×4 chassis; standard K-series slewing system
QY35K	35-ton	Truck crane; compatible slewing mechanism
QY50K	50-ton	Truck crane; K-series platform
QY65K	65-ton	Truck crane; K-series platform
SQ8ZK3Q / SQ10ZK3Q	Truck-mounted crane	Reducer motor for hydraulic loading cranes; precision-engineered spare part; high-strength cast iron housing; planetary gear reduction for torque transmission
XCA series	All-terrain crane	Comprehensive XCMG all-terrain crane range
XCT series	All-terrain crane	XCMG all-terrain crane range
XGC series	Crawler crane	XCMG crawler crane range

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Product Detail

Product Description: Rotary Reducer 800300438 for XCMG Crane

Rotary Reducer Applications Across XCMG Crane Models

The 800300438 rotary reducer is designed for use across multiple XCMG crane platforms, including:

Truck-mounted cranes — QY series (QY50B, QY70K, QY25K, etc.)
All-terrain cranes — XCT series, XCA series
Crawler cranes — XGC series
Truck-mounted crane variants — SQ series hydraulic loading cranes

1. Primary Rotary Reducer Assembly

Part Number	Part Name / Description
800300438	Rotary Reducer / Slewing Reducer Assembly (行星回转减速机) — Planetary gearbox for crane slewing mechanism

2. XCMG Reducer Seal Kit and Component Parts (Reference Only)

Swing motors and reducers share sealing components across the XCMG lineup. The following part numbers are provided as reference for associated sealing and repair components.

Part Number	Part Name / Description
803599367	ANELLO Seal Ring — 91.8 × 100 × 2mm; precision-engineered for reliable sealing in XCMG construction machinery; used on final drives, swing motors, and hydraulic pumps across XCMG excavators, loaders, and cranes
803197150	ANELLO Seal Ring — 75 × 87 × 12mm; direct factory replacement for final drives, swing motors, and hydraulic pumps across XCMG equipment
803196981	Seal — 75 × 90 × 10mm; genuine XCMG spare part for maintaining operational integrity
860558551	Seal Kit — For XE210 series machinery; complete seal kit including O-rings, backup rings, and seals; net weight 0.13kg
910908766	Seal Kit — For jack down applications; includes all O-rings, backup rings, and dust seals needed for one complete cylinder reseal
860102206	Seal — For 35300 series machinery
860110159	Buckle Seal — For Y00370096 series machinery; replaces 0734401106

3. Reducer Related Reference Numbers (For Cross-Identification)

Part Number	Part Name / Description
800302367	Reducer — CR51A150KC07400; applicable to A1-2004 series machinery; alternative reducer assembly for XCMG equipment
803419714	Swing Motor and Reducer Assembly Parts — Alternative assembly for XCMG mining excavators; associated with 803419541
804001415	Main Pump Assembly Parts — Associated with swing motor and reducer systems
860115256	Differential Assembly — For Z00360196A series machinery; Meichi 82214207; reference for drivetrain components
860100147	Fork — PY180G.13.1-1; for 001210034MP series machinery

4. XCMG Slewing System Component Reference Codes

XCMG parts system uses specific coding for slewing and reducer components:

Code / Reference	Component Description
8602110A — A version	Swing Reduction Gearbox code for XE210W excavator; includes reinforced bearing preload; correct part code eliminates abnormal noise and extends swing circle life

5. Applicable XCMG Crane Models (Reference)

The rotary reducer and its associated components are applicable to the following XCMG crane models:

Model	Tonnage Class	Description / Notes
QY70K / QY70K-I	70-ton	Truck crane; planetary reducer with constant closed-type brake; free sliding function
QY50B	50-ton	Truck crane; 8×4 chassis; Styr WD615.67A engine
QY25K	25-ton	Truck crane; 6×4 chassis; standard K-series slewing system
QY35K	35-ton	Truck crane; compatible slewing mechanism
QY50K	50-ton	Truck crane; K-series platform
QY65K	65-ton	Truck crane; K-series platform
SQ8ZK3Q / SQ10ZK3Q	Truck-mounted crane	Reducer motor for hydraulic loading cranes; precision-engineered spare part; high-strength cast iron housing; planetary gear reduction for torque transmission
XCA series	All-terrain crane	Comprehensive XCMG all-terrain crane range
XCT series	All-terrain crane	XCMG all-terrain crane range
XGC series	Crawler crane	XCMG crawler crane range

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Product Category

Rotary Reducer 800300438 XCMG Crane

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Product Description: Rotary Reducer 800300438 for XCMG Crane

Rotary Reducer Applications Across XCMG Crane Models

1. Primary Rotary Reducer Assembly

2. XCMG Reducer Seal Kit and Component Parts (Reference Only)

3. Reducer Related Reference Numbers (For Cross-Identification)

4. XCMG Slewing System Component Reference Codes

5. Applicable XCMG Crane Models (Reference)

Product Description: Rotary Reducer 800300438 for XCMG Crane

Rotary Reducer Applications Across XCMG Crane Models

1. Primary Rotary Reducer Assembly

2. XCMG Reducer Seal Kit and Component Parts (Reference Only)

3. Reducer Related Reference Numbers (For Cross-Identification)

4. XCMG Slewing System Component Reference Codes

5. Applicable XCMG Crane Models (Reference)

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