Product Overview
The OMP160 151-0346 and OMP315-11186712 belong to the Danfoss (Sauer-Danfoss / White Drive Motors) OMP Series of compact, low-speed, high-torque (LSHT) orbital hydraulic motors.
The OMP160 151-0346 (geometric displacement 160 cm³) is a classic model from the Danfoss OMP series. This product has been discontinued by Danfoss, with the official recommended replacement being the OMP-X 160 (part number 11186706). The OMP-X series is built on a modular platform that maintains complete “shape & fit” compatibility with the original OMP series while delivering comprehensive performance upgrades.
The OMP315-11186712 belongs to the next-generation OMP-X 315 platform. This model is the upgraded version of the OMP 315 (replacing OMP315 151-0317 and 151-0617), featuring significant improvements in displacement, torque, bearing capacity, and shaft seal performance. The Orbital X series delivers up to 15% more torque than previous OMP/OMR motors and features an improved HPS high-pressure shaft seal (rated at 225 bar).
Manufactured to strict Danfoss/White original specifications, this product features 100% form-fit-function interchangeability – mounting dimensions, port configurations, and shaft styles are fully identical to original motors, requiring zero modifications for direct replacement. Every motor undergoes 100% simulated duty-cycle testing prior to shipment, with performance validation conducted at rated pressure, flow, and actual load conditions.
OMP Series Family Overview:
The OMP Series is Danfoss’ standard line of orbital motors, with displacements ranging from 25 to 400 cm³/rev. The OMP family offers extensive variant options, including OMP (standard), OMR (low leakage), OMS (medium duty), OMT (heavy duty), OMV (extra heavy duty), OMER (with speed sensor), OMK (compact), and OMPT (with parking brake). Key distinctions:
OMP / OMR: Standard and low-leakage series, 25–500 cm³/rev
OMS / OMT / OMV: Medium to extra-heavy duty, max torque up to 2110 N·m
OMPT: OMP platform with integrated positive holding brake
OMER: OMP platform with integrated speed sensor
Technical Specifications
OMP160 151-0346 (Classic OMP Series)
Model Number: OMP160 151-0346
Series: Danfoss OMP Series
Manufacturer: Danfoss (Sauer-Danfoss)
Geometric Displacement: 160 cm³/rev
Maximum Operating Pressure: 175 bar (2538 psi)
Rated Operating Pressure: 140 bar
Maximum Speed: 1540 RPM
Minimum Speed: 5–10 RPM
Mounting Flange: SAE A2 (2-bolt), pilot Ø82.5 mm
Shaft Type: Cylindrical Ø25 mm, keyway 8 mm
Port Size: G 1/2 BSP
Bolt Hole Circle: 106.4 mm
Weight: Approx. 6.2 kg
Status: Discontinued, replaced by OMP-X 160 (11186706)
OMP315-11186712 (Next-Generation OMP-X 315)
Model Number: OMP315-11186712 (OMP-X 315)
Series: Danfoss White Orbital X (OMP-X Series)
Manufacturer: Danfoss White Drive Motors
Geometric Displacement: 306.1 cm³/rev
Max Continuous Inlet Pressure: 200 bar
Max Intermittent Inlet Pressure: 225 bar
Max Continuous Pressure Drop: 85–100 bar
Max Intermittent Pressure Drop: 115 bar
Max Continuous Speed: 195 RPM
Max Intermittent Speed: 245 RPM
Minimum Speed: 10 RPM
Max Continuous Torque: 340–400 N·m
Max Intermittent Torque: 450–495 N·m
Max Continuous Power: 7 kW
Max Intermittent Power: 8.8 kW
Mounting Flange: SAE A2, pilot Ø82.5 mm
Shaft Type: Cylindrical Ø25 mm, keyway 8 mm (DIN 6885)
Port Size: G 1/2 BSP (side ports)
Drain Port: G 1/4 BSP
Shaft Seal Type: HPS High-Pressure Seal (225 bar rating)
Built-in Features: Check valve (standard)
Bolt Hole Circle: 106.4 mm
Overall Length L: 167.6 mm
Net Weight: 7.50 kg
Recommended Oil Viscosity: 20–75 cSt
Key Technical Advantages
1. Orbital X Platform – Up to 15% Torque Increase
The OMP-X 315 (11186712) is built on Danfoss White’s next-generation Orbital X modular platform. Through an optimized drive train, this platform delivers up to 15% more torque than previous OMP/OMR series motors. For the OMP-X 315, this translates to peak torque output of up to 495 N·m at 225 bar intermittent pressure.
2. HPS High-Pressure Shaft Seal & Built-in Check Valve – Dual Reliability Assurance
All Orbital X series motors feature an improved HPS (High-Pressure Shaft Seal) as standard, rated at 225 bar. Built-in check valves come as standard equipment, effectively preventing cavitation and aeration during load-induced reverse rotation. A drain connection is also provided as standard for easy system integration.
3. Enhanced Bearing Capacity – Confidently Handling High Radial Loads
The Orbital X series is equipped with an enhanced bearing system featuring higher radial load capacity, capable of confidently handling demanding high side-load applications. This enables direct drive of belt pulleys, sprockets, or wheels without requiring external support bearings.
4. Full Series Form-Fit Interchangeability – Zero-Modification Upgrade Path
The Orbital X series maintains 100% “shape & fit” compatibility with the OMP series in mounting dimensions. For the discontinued OMP160 151-0346, direct replacement with OMP-X 160 (11186706) requires no plumbing or mounting modifications. The OMP-X 315 (11186712) fully replaces OMP315 151-0317 and 151-0617.
5. OMPT Integrated Parking Brake – Safety Upgrade Option
For applications requiring parking brake functionality, the OMPT series integrates a positive holding brake directly into the OMP platform. This integrated solution eliminates the need for external brake components, reducing installation space and system costs while improving overall machine safety – ideal for cranes, winches, and vehicle propulsion applications requiring reliable parking brakes.
Application Areas
Agricultural Machinery: Combine harvesters (header drives, reel drives), specialty harvesters for potato, tomato, sugarcane, cotton, coffee, and grapes, forage harvesters, silage machines
Turf & Grounds Maintenance: Zero-turn mowers, golf course maintenance equipment, turf aerators
Material Handling: Forklifts, reach stackers, conveyor belt drives
Construction Equipment: Skid steer attachments, compact excavator swing drives, trenchers
Municipal & Sanitation: Street sweepers (brush drives), snow removal equipment
Fan Drive Systems: Engine cooling fan drives
Winches & Boom Rotation: Winch drives, crane slewing mechanisms
Industrial Applications: Augers, mixers, packaging machinery
Expert Maintenance Tips
1. Distinguish Between Classic OMP and Next-Generation OMP-X Series
The OMP160 151-0346 is from the classic OMP series and has been officially discontinued. The recommended replacement is OMP-X 160 (11186706). While the OMP-X series maintains complete mounting compatibility, it offers improved performance parameters – replacement requires no installation adjustments while delivering higher torque output.
2. Proper Use of Drain Port
The OMP-X 315 (11186712) comes standard with a G 1/4 BSP drain port. When the motor is used in a series configuration, the drain line must be connected to maintain case pressure within allowable limits. Case pressure must not exceed the shaft seal rating (225 bar).
3. Fluid Cleanliness Control
OMP series orbital motors are sensitive to fluid cleanliness. Recommended system filtration: ISO 4406 18/16/13 or better. Recommended oil viscosity: 20–75 cSt. Contaminants accelerate wear on the commutator and roller vane rotor sets, leading to loss of volumetric efficiency.
4. Shaft Installation Precautions
OMP series motors feature a cylindrical Ø25 mm shaft with keyway. Never use hammers to install couplings or pulleys – use appropriate press-fit tools or heat-shrink methods. Improper installation will damage bearings and shaft seals.
5. First Start-Up & Air Bleeding
After installation, bleed air from the system through a loosened outlet fitting. Run the motor at low speed under no load for 5-10 minutes to ensure complete system air bleeding and proper oil film establishment on all lubrication surfaces. Gradually apply load to reach rated operating conditions.
