Product Overview
The ERR100BLS2420NNF3S1BPA1NNNNNNNNNN belongs to the Sauer Danfoss Series 45 (S45) E-frame open-circuit axial piston variable displacement pump family, with a displacement of 100 cc/rev (6.1 in³/rev), load sensing (LS) control, and right-hand rotation. The pump delivers continuous working pressure up to 310 bar (4495 psi) and peak pressure up to 400 bar (5800 psi), making it one of the most widely used specifications in the Series 45 family for construction machinery, agricultural equipment, and industrial hydraulic systems.
The Series 45 family covers displacements from 25 to 147 cc/rev, with maximum speeds up to 3600 rpm and continuous operating pressures up to 310 bar. The pumps feature a swashplate variable displacement design that continuously adjusts output flow by varying the swashplate angle in response to system pressure and load demand. The monoblock rigid cast iron housing minimizes leakage paths, reduces operational noise, and enhances structural rigidity in high-vibration environments.
As a complete model code, the ERR100BLS2420NNF3S1BPA1NNNNNNNNNN encompasses full parameters including displacement, control type, mounting flange, drive shaft, and port configuration. The mounting flange, drive shaft spline, and port layout are identical to the original Sauer Danfoss ERR100 pump, enabling direct bolt-on replacement without system modification or adapter plates.
Every pump undergoes 100% simulated operating-condition testing before shipment, including rated pressure hold, flow characteristic verification, and control response validation—delivering immediate reliability upon installation.
Technical Specifications
Model Identification:
ERR100BLS2420NNF3S1BPA1NNNNNNNNNN — Complete model code, Series 45 E-frame, 100 cc/rev displacement, load sensing (LS) control
ERR100BLS2020NNN3S2NPA1NNNNNNNNNN — Reference model, factory setting: DA 200 bar, LS standby 20 bar
Displacement:
ERR100: 100.0 cc/rev (6.1 in³/rev)
ERR130: 130.0 cc/rev (7.93 in³/rev)
ERR147: 147.0 cc/rev (8.97 in³/rev)
Pressure Ratings (ERR100):
Continuous working pressure: 310 bar (4495 psi)
Peak intermittent pressure: 400 bar (5800 psi)
Maximum case pressure: 3 bar
Speed Range (ERR100):
Minimum stable speed: 500 rpm
Continuous rated speed: 2450 rpm
Maximum intermittent speed: 2880 rpm
Theoretical Flow:
Control Types:
LS Load Sensing Control — Automatically adjusts pump displacement based on load pressure signal, delivering only the flow required by actuators
Factory settings (reference model): DA 200 bar, LS standby 20 bar
PC setting range: 100-280 bar (AG/AR code); 290-310 bar (BE/BR code)
LS setting range: 10-34 bar (145-508 psi)
Optional controls: pressure compensator (PC), electro-proportional, hydraulic remote control
Structural Parameters:
Pump type: Open-circuit swashplate axial piston variable displacement
Mounting flange: SAE C 4-bolt (SAE J744)
Drive shaft: ANSI B92.1 splined shaft (z17 12/24dp)
Rotation: Right-hand (clockwise), viewed from shaft end
Port position: Radial (side)
Through-drive: Not supported (this configuration)
Recommended fluid: ISO VG32 / VG46 anti-wear hydraulic oil, DIN 51524-2 HLP grade
Fluid cleanliness requirement: NAS 8 or better
Operating oil temperature: -20°C to +90°C
Weight: Approximately 51.3 kg (113 lbs) axial ports / 54.9 kg (121 lbs) radial ports
Key Technical Advantages
1. Complete Model Coding Enables 100% Drop-in Interchange
The Series 45 model code system follows a standardized structure: ERR indicates E-frame right-hand rotation, 100 indicates the displacement class, B indicates the housing version, LS indicates load sensing control, and subsequent characters correspond to mounting flange, shaft, auxiliary drive, seal, and other options. The SAE C 4-bolt mounting flange, ANSI B92.1 splined drive shaft, and radial port layout of the ERR100BLS2420NNF3S1BPA1NNNNNNNNNN are identical to the original Sauer Danfoss ERR100, enabling direct bolt-on replacement without piping modification.
2. Load Sensing Control Significantly Reduces Energy Consumption
The LS load sensing control on the ERR100BLS2420NNF3S1BPA1NNNNNNNNNN automatically adjusts pump displacement based on actual load pressure at the actuator, delivering only the required flow. The LS setting range is 10-34 bar (145-508 psi). When actuators stop, the pump reduces displacement to near zero, maintaining only standby pressure—significantly reducing system heat generation and energy loss.
3. Monoblock Cast Iron Housing Reduces Noise and Leakage
The pump features a monoblock rigid cast iron housing. The single-piece structure reduces leakage paths, lowers operational noise, and enhances structural rigidity in high-vibration environments. Compared to multi-piece housing pumps, fewer components simplify maintenance and ensure stable performance under high-impact and continuous vibration conditions.
4. Precision Machining Ensures High Volumetric Efficiency
Piston-cylinder interfaces undergo precision lapping, and the valve plate is optimized to reduce pressure pulsation and flow ripple. The precision-machined rotating group maintains stable volumetric efficiency at 310 bar continuous duty, minimizing internal leakage and heat generation. Theoretical flow reaches 245 L/min at 2450 rpm, with input torque at maximum displacement of 1.592 N·m/bar.
5. Modular Configuration for Diverse Applications
The Series 45 family offers a wide selection of SAE mounting flanges, spline shafts, port sizes, and rear cover options, enabling flexible system integration and tandem pump combinations. The radial port layout (code 24) of the ERR100BLS2420NNF3S1BPA1NNNNNNNNNN adapts to specific piping arrangements, providing equipment manufacturers with flexible system integration solutions.
Application Areas
Wheel loaders and backhoe loaders
Compact and mid-size excavators
Road rollers and road construction machinery
Forklifts and material handling equipment
Agricultural machinery (tractors, combine harvesters)
Drilling rigs and mining mobile equipment
Concrete pump trucks and engineering vehicles
Expert Maintenance Tips
1. Pre-Installation Model Verification
Verify the complete model code on the pump nameplate before installation. The ERR100BLS2420NNF3S1BPA1NNNNNNNNNN is configured for right-hand rotation, with an ANSI B92.1 splined drive shaft (z17 12/24dp) and SAE C 4-bolt mounting flange. Ensure drive shaft-to-coupling concentricity within 0.05 mm to prevent premature seal failure from radial loads.
2. Hydraulic Fluid Cleanliness Requirements
Use ISO VG32 / VG46 anti-wear hydraulic oil, DIN 51524-2 HLP grade. Fluid cleanliness should be NAS 8 or better (equivalent to ISO 4406 18/16/13). Suction filter rating should be no coarser than 10 μm. Flush the system thoroughly before first operation. Operating oil temperature range: -20°C to +90°C.
3. LS Line Connection
The LS load-sensing port line must be connected to the system load signal port. The line must remain sealed with no leakage. LS line leakage prevents the pump from properly responding to load demand. The LS setting range is 10-34 bar; factory reference standby pressure is 20 bar.
4. First Start-Up Procedure
Fill the pump housing with clean hydraulic oil before first start. Run at 500-800 rpm unloaded for 5-10 minutes to purge air. Confirm no suction line leakage and steady oil flow from the case drain line before gradually increasing speed and loading to rated conditions. Case drain back pressure must not exceed 3 bar, and the drain line end should always remain submerged below the reservoir oil level.
5. Routine Maintenance
Replace hydraulic oil filters every 2,000 operating hours or annually. Periodically inspect the pump exterior for leaks and check the drive shaft seal condition. If flow decline or pressure instability is observed, prioritize inspection of the valve plate and piston-cylinder wear. Recommended overhaul interval: no more than 8,000 operating hours or 5 years.
