ERL100BBS3120NNN3S4CPA1NNNNN Sauer Danfoss Piston Pump 100cc 310 Bar

Product Overview

The ERL100BBS3120NNN3S4CPA1NNNNN and ERR147CLS2525NNN3S1BPA1NAAANNNNNN both belong to the Sauer Danfoss Series 45 (S45) open-circuit axial piston variable displacement pump family. They 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 ERL100BBS3120NNN3S4CPA1NNNNN is the ERL100 specification (E-frame, 100 cc/rev), corresponding to the complete model code ER-L-100B-BS-31-20-NN-N-3-S4CP-A1N-NNN-NNN-NNN. It features load sensing/pressure compensator control (type BS) with PC pressure set at 310 bar and LS standby pressure at 20 bar, configured for left-hand rotation. The ERL version incorporates heavy-duty tapered roller bearings, making it suitable for extended continuous heavy-load operation.

The ERR147CLS2525NNN3S1BPA1NAAANNNNNN is the ERR147 specification (E-frame, 147 cc/rev), corresponding to the complete model code ER-R-147C-LS-25-25-NN-N-3-S1BP-A1N-AAA-NNN-NNN. It features load sensing control (LS) with PC pressure set at 250 bar and LS standby pressure at 20 bar, configured for right-hand rotation.

Both pumps feature a monoblock rigid cast iron housing that minimizes leakage paths, reduces operational noise, and enhances structural rigidity in high-vibration environments. The mounting flange, drive shaft spline, and port layout are identical to the original Sauer Danfoss 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.

Technical Specifications 

Model Identification:

• ERL100BBS3120NNN3S4CPA1NNNNN — ERL100 specification, 100 cc/rev, load sensing/pressure compensator control (BS), PC 310 bar, left-hand rotation, SAE C 4-bolt flange

• ERR147CLS2525NNN3S1BPA1NAAANNNNNN — ERR147 specification, 147 cc/rev, load sensing control (LS), PC 250 bar, right-hand rotation, SAE C 4-bolt flange

Displacement (Series 45 E-Frame):

• ERR100 / ERL100: 100.0 cc/rev (6.1 in³/rev)

• ERR130 / ERL130: 130.0 cc/rev (7.93 in³/rev)

• ERR147 / ERL147: 147.0 cc/rev (8.97 in³/rev)

Pressure Ratings (ERL100):

• Continuous working pressure: 310 bar (4495 psi)

• Peak intermittent pressure: 400 bar (5800 psi)

Pressure Ratings (ERR147):

• Continuous working pressure: 260 bar (3770 psi)

• Peak intermittent pressure: 350 bar (5075 psi)

Speed Range (ERL100, heavy-duty bearing version):

• Minimum stable speed: 500 rpm

• Continuous rated speed: 2200 rpm

• Maximum intermittent speed: 2600 rpm

Speed Range (ERR147):

• Minimum stable speed: 500 rpm

• Continuous rated speed: 2100 rpm

• Maximum intermittent speed: 2475 rpm

Theoretical Flow (at rated speed):

• ERL100: 220 L/min at 2200 rpm

• ERR147: 308.7 L/min at 2100 rpm

Control Types:

• ERL100BBS3120 — Load sensing/pressure compensator control (type BS), PC pressure setting 310 bar, LS standby pressure 20 bar

• ERR147CLS2525 — Load sensing control (LS), PC pressure setting 250 bar, LS standby pressure 20 bar

• Optional controls: pressure compensator (PC), electro-proportional, hydraulic remote control

Structural Parameters:

• Pump type: Open-circuit swashplate axial piston variable displacement

• Series: Series 45 E-Frame

• Mounting flange: SAE C 4-bolt (SAE J744)

• Drive shaft: 14-tooth 12/24 pitch splined shaft

• Rotation: ERL100 = left-hand (counter-clockwise); ERR147 = right-hand (clockwise)

• Port position: Radial (side)

• Housing material: Monoblock cast iron

• Seal material: Single lip FKM shaft seal

• Weight (ERL100): Approximately 55 kg

• Weight (ERR147): Approximately 58-68 kg (configuration-dependent)

Hydraulic Fluid and Operating Conditions:

• Recommended fluid: ISO VG32 / VG46 anti-wear hydraulic oil, DIN 51524-2 HLP grade

• Cleanliness requirement: NAS 8 or better (ISO 4406 18/16/13)

• Operating oil temperature: -20°C to +90°C

Key Technical Advantages

1. Complete Model Coding Enables 100% Drop-in Interchange

The Series 45 model code system follows a standardized structure: each character in the ERL100BBS3120NNN3S4CPA1NNNNN and ERR147CLS2525NNN3S1BPA1NAAANNNNNN corresponds to specific parameters—displacement class, control type (BS = load sensing/pressure compensator; LS = load sensing), PC pressure setting, mounting flange (SAE C 4-bolt), drive shaft specification, and rotation direction. The SAE C 4-bolt mounting flange, 14-tooth splined drive shaft, and radial port layout of both pumps are identical to the original Sauer Danfoss pump, enabling direct bolt-on replacement without piping modification.

2. Load Sensing Control Significantly Reduces Energy Consumption

The BS load sensing/pressure compensator control on the ERL100 and the LS load sensing control on the ERR147 both automatically adjust pump displacement based on actual load pressure at the actuator, delivering only the required flow. When actuators stop, the pump reduces displacement to near zero, maintaining only approximately 20 bar standby pressure—significantly reducing system heat generation and energy loss.

3. ERL Heavy-Duty Bearing Version Extends Service Life

The ERL100BBS3120NNN3S4CPA1NNNNN, as the ERL heavy-duty version, incorporates upgraded heavy-duty tapered roller bearings and reinforced rotating group components. Compared to the standard ERR version, the ERL version offers extended service life under continuous heavy-load operation, making it particularly suitable for construction machinery and industrial hydraulic systems requiring long-duration continuous operation.

4. 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.

5. 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 ERL100 delivers 220 L/min theoretical flow at 2200 rpm rated speed, while the ERR147 delivers 308.7 L/min at 2100 rpm. Precision-machined components maintain stable volumetric efficiency at rated pressure conditions, minimizing internal leakage and heat generation.

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

• Forestry machinery and wheeled harvesters

Expert Maintenance Tips

1. Pre-Installation Model Verification

Verify the complete model code on the pump nameplate before installation. The ERL100BBS3120NNN3S4CPA1NNNNN is configured for left-hand rotation (L code), while the ERR147CLS2525NNN3S1BPA1NAAANNNNNN is configured for right-hand rotation (R code). Ensure drive shaft-to-PTO output shaft 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 (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 of both pumps 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, causing sluggish system operation or abnormal pressure rise. The PC pressure setting for the ERL100BBS3120 is 310 bar, and for the ERR147CLS2525 is 250 bar; LS standby pressure is 20 bar for both.

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.