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HMHDB400 radial flow motor for heavy machinery

HMHDB400 radial flow motor for heavy machinery

HMHDB400 hydraulic motor, standard Displacement 6800cm3/r, optional non-standard Displacement 6468cm3/r、6137cm3/r、5322 cm3/r、4340 cm3/r、4000 cm3/r. Rated Pressure 210bar, Rated Power 185KW. Heavy load bearing, the shaft can bear greater Side Load.

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HMHDB400

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Product Introduction

HMHDB400 hydraulic motor, standard Displacement 6800cm³/r, optional non-standard Displacement 6468cm³/r、6137cm³/r、5322 cm³/r、4340 cm³/r、4000 cm³/r. Rated Pressure 210bar, Rated Power 185KW. Heavy load bearing, the shaft can bear greater Side Load.

HMHDB400 is a model designation used by Hyundai Heavy Industries (HHI) and/or their affiliated hydraulic component brands (often under Hyundai Electric & Machinery Co., Ltd., or OEM partners) for high-performance hydraulic motors, typically used in heavy machinery like:ExcavatorsLoadersCranesAgricultural machineryMining equipmentConstruction and industrial vehicles.

Note: "HMHDB" likely stands for:H – HyundaiM – MotorHDB – High Torque, Double Gear / or specific series code400 – Likely refers to displacement (cc/rev) or frame size

Common Applications of HMHDB400 Hydraulic MotorExcavator Track Drives

Provides high torque at low speed for digging and moving.Swing Motors in Cranes & Excavators
Handles heavy rotation loads.Loader Bucket Cylinders (via gear reduction)
Used with planetary gearboxes.Mining & Heavy-Duty Equipment
Designed for continuous operation under extreme conditions.

Technical Parameters

Motor type Metric	Geometric displacement mL/r	Average actual running torque (Nm/bar)	SPEED		PRESSURE		OUTPUT POWER
Motor type Metric	Geometric displacement mL/r	Average actual running torque (Nm/bar)	Rated. rpm	Max. rpm	Rated. bar	Max. bar	Rated. KW	Max. KW
B400	6800	97.31	88	110	210	275	185	220
B400/6468	6468	91.53	90	112	210	275	181	215
B400/6137	6137	85.87	92	115	210	275	172	205
B400/5322	5322	73.20	100	125	210	275	160	190
B400/4340	4340	58.66	110	137	210	275	140	165
B400/4000	4000	53.42	115	143	210	275	135	160

Installation Dimensions

Installation Dimensions for HMHDB400.pdf

FAQ

FAQs

Is the installation dimension of your HMHDB400 hydraulic motor the same as the original motor from UK, and do any modifications need to be made during installation?

Is the installation dimension of your HMHDB400 hydraulic motor the same as the original motor from UK, and do any modifications need to be made during installation?
A: Our HMHDB400 hydraulic motor has the same installation dimension as the original motor from UK, and it can be used without any modifications. As long as the model is confirmed to be the same, all the installation dimensions of the motor will be exactly the same as this.
This is a crucial detail for a successful replacement, especially in heavy machinery like excavators, loaders, or industrial.
Is the Accessories of your HMHDB400 hydraulic motor interchangeable and compatible with the original one from the UK?

All accessories of Our HMHDB400 hydraulic motor are same as the original from UK.
Includes: mounting flanges, shafts, seals, O-rings, oil ports, gaskets, bolts, and alignment featuresThis is a major win for reliability, installation speed, and long-term performance — especially in heavy-duty applications like excavators, loaders, cranes, or industrial machinery.
Why is there only a heavy-duty HMHDB400 hydraulic motor, but no light-duty or standard one, such as HMB400?

The HMHDB400 hydraulic motor is designed with a double-row cylinder block layout and a double-row eccentric wheel with an included angle of 162°. This design causes most of the resultant forces on the Rear Bearing and Front Bearing to cancel each other out, leaving only a small portion of the resultant force acting on the Rear Bearing and Front Bearing. with bearings that are standard configuration for other HMB motors, the bearings' life is far greater than other HMB hydraulic motors. Therefore, only the HMHDB400 heavy load hydraulic motor.

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HMHDB400 radial flow motor for heavy machinery

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