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Steering box assy 80300385 XCMG QY70K Truck Crane

Steering box assy 80300385 XCMG QY70K Truck Crane

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Product Description: Steering Gear Assembly 80300385 for XCMG QY70K Truck Crane

The Steering Gear Assembly 80300385 is a genuine OEM component for the XCMG QY70K Series Truck Crane, a 70‑ton (77 US‑ton) class mobile crane widely used in construction, urban renewal, transportation, ports, bridge building, oilfields, mining and other complex operating environments. As the core hydraulic control unit of the vehicle‘s power steering system, the steering gear assembly converts the operator’s steering wheel input into precisely regulated hydraulic signals that direct the steering cylinders, enabling smooth and responsive turning of the crane‘s multi‑axle chassis.

1. Primary Steering Gear Assembly

Part Number	Part Name / Description	Application / Notes
80300385	Steering Gear Assembly / Power Steering Gear	XCMG QY70K Truck Crane; 70‑ton class; hydraulic power steering core component; converts steering wheel rotation into hydraulic pressure to actuate the steering cylinders; compatible with QY70K‑I and QY70K‑II variants; OEM genuine XCMG spare part

2. Related XCMG Truck Crane Steering Gear Part Numbers (Reference Only)

The following steering gear part numbers are used on other XCMG truck crane platforms. These are provided for cross‑reference only and are not interchangeable with the 80300385 QY70K assembly.

Part Number	Part Name / Description	Application / Notes
80300654	Steering Gear Assembly	XCMG QY25K Truck Crane; 25‑ton class; hydraulic power steering gear; not interchangeable with 80300385
803002565	Power Steering Gear / Steering Gear Assembly	XCMG truck crane series (general reference); verify compatibility before ordering
803000654	Steering Gear Assembly	XCMG QY25K wheeled truck crane (alternate reference model for other K‑series cranes)

3. Associated Steering System Components for QY70K Crane (Generic Reference)

For a complete steering system inspection or overhaul, the following associated components should be examined. Specific part numbers vary by chassis variant and production year and must be obtained from the XCMG parts catalog.

Component Type	Part Name / Description	Application / Notes
Steering Pump	Hydraulic Steering Pump	Hydraulic pump that supplies pressurised oil to the 80300385 steering gear assembly; driven by the chassis engine; part number varies by QY70K chassis variant and production year
Steering Cylinder	Steering Boosting Cylinder	Double‑acting hydraulic cylinder that translates hydraulic pressure from the steering gear into steering axle movement; QY70K typically uses one or two steering cylinders depending on axle configuration
Priority Valve / Flow Control Valve	Priority Valve	Valve that prioritises hydraulic flow to the steering system over auxiliary circuits; LS port from the steering gear connects to this valve
Steering Column Assembly	Steering Column Assembly	Mechanical link between the steering wheel and the steering gear input shaft; includes universal joints and intermediate shafts; QY70K is equipped with a multifunction steering wheel with electrical adjustment and position memory features
Hydraulic Hoses	Pressure, Return, and LS Hoses	High‑pressure supply line, low‑pressure return line, and LS (load sensing) signal line connecting the steering gear to the steering pump and priority valve
Steering Fluid Reservoir	Hydraulic Oil Tank	Tank supplying hydraulic fluid to the steering pump; includes return line filter and breather cap

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Product Detail

Product Description: Steering Gear Assembly 80300385 for XCMG QY70K Truck Crane

1. Primary Steering Gear Assembly

Part Number	Part Name / Description	Application / Notes
80300385	Steering Gear Assembly / Power Steering Gear	XCMG QY70K Truck Crane; 70‑ton class; hydraulic power steering core component; converts steering wheel rotation into hydraulic pressure to actuate the steering cylinders; compatible with QY70K‑I and QY70K‑II variants; OEM genuine XCMG spare part

2. Related XCMG Truck Crane Steering Gear Part Numbers (Reference Only)

The following steering gear part numbers are used on other XCMG truck crane platforms. These are provided for cross‑reference only and are not interchangeable with the 80300385 QY70K assembly.

Part Number	Part Name / Description	Application / Notes
80300654	Steering Gear Assembly	XCMG QY25K Truck Crane; 25‑ton class; hydraulic power steering gear; not interchangeable with 80300385
803002565	Power Steering Gear / Steering Gear Assembly	XCMG truck crane series (general reference); verify compatibility before ordering
803000654	Steering Gear Assembly	XCMG QY25K wheeled truck crane (alternate reference model for other K‑series cranes)

3. Associated Steering System Components for QY70K Crane (Generic Reference)

Component Type	Part Name / Description	Application / Notes
Steering Pump	Hydraulic Steering Pump	Hydraulic pump that supplies pressurised oil to the 80300385 steering gear assembly; driven by the chassis engine; part number varies by QY70K chassis variant and production year
Steering Cylinder	Steering Boosting Cylinder	Double‑acting hydraulic cylinder that translates hydraulic pressure from the steering gear into steering axle movement; QY70K typically uses one or two steering cylinders depending on axle configuration
Priority Valve / Flow Control Valve	Priority Valve	Valve that prioritises hydraulic flow to the steering system over auxiliary circuits; LS port from the steering gear connects to this valve
Steering Column Assembly	Steering Column Assembly	Mechanical link between the steering wheel and the steering gear input shaft; includes universal joints and intermediate shafts; QY70K is equipped with a multifunction steering wheel with electrical adjustment and position memory features
Hydraulic Hoses	Pressure, Return, and LS Hoses	High‑pressure supply line, low‑pressure return line, and LS (load sensing) signal line connecting the steering gear to the steering pump and priority valve
Steering Fluid Reservoir	Hydraulic Oil Tank	Tank supplying hydraulic fluid to the steering pump; includes return line filter and breather cap

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Steering box assy 80300385 XCMG QY70K Truck Crane

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Product Description: Steering Gear Assembly 80300385 for XCMG QY70K Truck Crane

1. Primary Steering Gear Assembly

2. Related XCMG Truck Crane Steering Gear Part Numbers (Reference Only)

3. Associated Steering System Components for QY70K Crane (Generic Reference)

Product Description: Steering Gear Assembly 80300385 for XCMG QY70K Truck Crane

1. Primary Steering Gear Assembly

2. Related XCMG Truck Crane Steering Gear Part Numbers (Reference Only)

3. Associated Steering System Components for QY70K Crane (Generic Reference)

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