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MRH-3150 Precision Engineered Motor Replacement

MRH-3150 hydraulic motor, Geometric Displacement 3087cm3/r. Rated Pressure 210bar, Rated Power 135KW.

  • MRH-3150

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Product Introduction

MRH-3150 hydraulic motor, Geometric Displacement 3087cm3/r. Rated Pressure 210bar, Rated Power 135KW.

The MRH-3150 hydraulic motor is a high-performance, reliable, compact, and easy-to-maintain hydraulic power unit. It is suitable for a wide range of industrial applications and machinery, providing excellent power output and stable operating performance. With its superior performance, reliable quality, and wide applicability, it provides powerful and stable power support for a wide range of industrial equipment, making it a trusted hydraulic power solution.

Model Suffix Explanation

Typical full‑model example: MRH‑3150‑SWN‑2

  1. MRH‑3150: Frame size, fixed‑displacement radial‑piston motor

  2. S: Shaft type

  3. W: Built‑in spring‑applied hydraulic‑release multi‑disc brake (load‑holding brake for winch)

  4. N: Port housing configuration

  5. 2: Design revision number

Note: MRH series is fixed‑displacement only. No built‑in two‑speed shift function. If variable‑speed is required, external hydraulic circuit control is needed.

Core Design Features

‑ Multi‑piston radial‑cam hydrostatic balance design, high volumetric & mechanical efficiency‑ Excellent break‑away torque, stable smooth rotation under very low‑speed working condition‑ Bi‑directional rotation‑ Optional integrated static multi‑disc brake for load‑holding (critical for marine winch / windlass)‑ Heavy‑duty marine‑grade structure, suitable for harsh offshore deck environment‑ Separate case drain port, mandatory for correct bearing lubrication

Typical Applications

  1. Marine: Anchor windlasses, mooring winches, hatch cover drives, ship capstans, deck cranesSTC MARINE...

  2. Heavy‑duty industrial: Large winches, heavy reel winder/unwinder, rotary slewing drives

Critical Installation & Piping Guidelines

  1. Case drain line: Must connect directly to hydraulic tank. Do not tee‑off into main return line. Minimum pipe bore ≥ 12 mm for drain runs up to 5 m. Larger bore for longer piping.

  2. Vertical‑shaft‑up mounting: Must use specified drain port with check‑valve to prevent oil siphoning and bearing starvation.

  3. Shaft coupling: Strict alignment required. Avoid excessive radial / axial external loads on output shaft.

  4. System filtration recommendation: ISO 4406 cleanliness level ≤ 22/18/13, absolute filter ≤ 20 μm.

  5. For fire‑resistant hydraulic fluids: Special seal set must be specified upon ordering.

Ordering Checklist

  1. Complete full part‑number (MRH‑3150‑xxx‑x)

  2. Shaft type (flange shaft / spline shaft)

  3. Brake option: With / without built‑in multi‑disc brake(W)

  4. Port housing code, design revision

  5. Shaft mounting orientation: Horizontal / Vertical‑up / Vertical‑down

  6. Seal material: Standard NBR or special seals for non‑mineral oil

  7. Application: Marine / industrial, duty‑cycle profile

Common Trouble‑shooting Hints

‑ Insufficient output torque: Verify system working pressure; inspect internal piston‑cam wear; check system contamination.
‑ High case drain flow: Internal component wear; motor overhaul is required.
‑ Shaft seal oil leakage: Excessive case back‑pressure, damaged seal or scratched shaft surface.

‑ Brake cannot hold load: Check brake spring fatigue, brake disc wear, residual pressure inside brake release circuit.

1


Technical Parameters

MODEL

DISPACEMENT
mL/r

MAX. SET
PRESSURE
Mpa
(kgf/cm2）

SPEED RANGE rpm

WEIGHT
kg

at 20.6MPa
（210 kgf/cm2）

at 24.5MPa
（250 kgf/cm2）

MRH-3150

3087

24.5
（250）

5∽135

7∽115

300


Installation Dimensions

download Installation Dimensions for MRH-3150.pdf

FAQ

FAQs
  • Is the installation dimension of your MRH-3150 hydraulic motor the same as the original motor from JP, and do any modifications need to be made during installation?
    加 Created with Sketch.
    形状 Created with Sketch.
    Our MRH-3150 hydraulic motor has the same installation dimension as the original motor from JP, 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.
    The MRH-3150 hydraulic motor has identical mounting dimensions to a hydraulic motor manufactured in Japan, confirming they are identical. This ensures compatibility and proper operation of your equipment.
  • Is the Accessories of your MRH-3150 hydraulic motor interchangeable and compatible with the original one from the JP?
    加 Created with Sketch.
    形状 Created with Sketch.
    Our MRH-3150 hydraulic motor parts are different from the original parts made in Japan and cannot be used interchangeably.
    Although the parts of MRH-3150 hydraulic motor are different from those of Japanese origin, these differences are optimizations and improvements based on actual domestic conditions, giving the product unique advantages in performance, cost and market adaptability.
  • What about the quality of your MRH-3150 hydraulic motor?
    加 Created with Sketch.
    形状 Created with Sketch.
    Our MRH-3150 motor has been used and verified for nearly twenty years. It has good performance and high reliability. The probability of quality problems within 12 months of product use is close to.
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