90R100MA1BC60S3C7E03GBA353520 Danfoss 90R100 Pump 100cc 450bar

Product Overview

The 90R100MA1BC60S3C7E03GBA353520 is a Danfoss (formerly Sauer-Danfoss) Series 90 size 100 closed-circuit swashplate-type axial variable displacement piston pump with a nominal displacement of 100 cm³/rev (6.10 in³/rev), maximum working pressure of 450 bar (6525 psi), rated speed of 3300 rpm, maximum speed of 3650 rpm, theoretical flow of approximately 330 L/min (87 US gal/min), theoretical torque of 1.59 N·m/bar, mass moment of inertia of 0.015 kg·m², and weight of approximately 49 kg (108 lb).

Important Technical Clarification: This model is equipped with MA control, which is Manual Displacement Control (MDC). It converts a mechanical input signal to a hydraulic signal via a four-way servo valve that tilts the cradle swashplate, enabling manual adjustment of pump displacement from zero to maximum. MA control is a variable displacement control method, not a fixed displacement control. The “Fixed Displacement” wording in the original title does not align with the actual technical specifications of the Danfoss Series 90, as the entire Series 90 range comprises variable displacement pumps. MA control is widely deployed in construction machinery applications requiring moderate control precision but exceptionally high reliability, thanks to its precise manual operation, simple construction, and excellent contamination resistance.

The Series 90 pumps employ a parallel axial piston/slipper concept in conjunction with a tiltable swashplate, specifically engineered for closed-circuit hydrostatic transmission systems. The pump delivers output flow proportional to drive speed and displacement, with stepless displacement variation via swashplate angle adjustment and smooth output direction reversal through the neutral position. The integral charge pump provides system replenishing and cooling oil flow as well as control fluid flow, ensuring the main circuit remains filled with hydraulic fluid, effectively preventing cavitation and maintaining system stiffness.

The Series 90 is positioned by Danfoss as an “advanced technology” platform, with engineering core strengths including high power density, compact lightweight design, and PLUS+1™ compliant controls and sensors, covering 8 displacement sizes from 42 to 250 cm³/rev. The 90R100MA1BC60S3C7E03GBA353520 features mounting flange, splined shaft, and port layouts conforming to Sauer Danfoss Series 90 standards, enabling drop-in interchangeability with other 90R100 configurations as well as same-frame 90R075 and 90R130 products.

Every 90R100MA1BC60S3C7E03GBA353520 undergoes 100% simulated duty-cycle testing prior to shipment — covering pressure holding, flow output, control response, and internal leakage — ensuring complete drop-in interchangeability with original Danfoss pumps without installation or plumbing modifications.

Technical Specifications

• Model: 90R100MA1BC60S3C7E03GBA353520

• Brand: Danfoss (formerly Sauer-Danfoss)

• Series: Series 90 size 100

• Pump Type: Closed-circuit swashplate axial variable displacement piston pump (cradle swashplate design)

• Nominal Displacement: 100 cm³/rev (6.10 in³/rev)

• Maximum Working Pressure (continuous): 450 bar (6525 psi)

• Peak Pressure Capability: 480 bar (6960 psi)

• Rated Speed: 3300 rpm

• Maximum Speed: 3650 rpm

• Maximum Attainable Speed: 4000 rpm

• Minimum Speed: 500 rpm

• Theoretical Flow at Rated Speed: Approx. 330 L/min (87 US gal/min)

• Theoretical Torque: 1.59 N·m/bar (970 in lb/1000 psi)

• Mass Moment of Inertia: 0.015 kg·m² (0.356 lb·ft²)

• Control Type: MA manual displacement control (MDC), mechanical input signal via four-way servo valve driving double-acting servo piston

• Displacement Adjustment Range: Stepless from zero to maximum

• Direction of Rotation: R (right-hand, clockwise, viewed from shaft end)

• Mounting Flange: SAE standard flange

• Shaft Type: Splined shaft

• Seals: NBR (Nitrile)

• Housing Material: High-strength cast iron

• Weight: Approx. 49 kg (108 lb)

• Charge Pump: Integral, providing system replenishing and control fluid flow

• Case Drain Ports: Standard configuration

• Fluid Cleanliness Requirement: ISO 18/16/13 or better

• Recommended Fluid: Mineral-based hydraulic oil (HLP/HM)

• Operating Temperature Range: -40 to +104 ℃

• Fluid Compatibility: Mineral-based hydraulic oil, fire-resistant hydraulic oil

Series 90 Same-Family Displacement Reference (nominal conditions):

• 90R042 / 90L042: 42 cm³/rev (2.56 in³/rev), 450 bar max, rated 4200 rpm, max 4600 rpm, theoretical flow 174 L/min

• 90R055 / 90L055: 55 cm³/rev (3.35 in³/rev), 450 bar max, rated 3900 rpm, max 4250 rpm, theoretical flow 215 L/min

• 90R075 / 90L075: 75 cm³/rev (4.57 in³/rev), 450 bar max, rated 3600 rpm, max 3950 rpm, theoretical flow 270 L/min

• 90R100 / 90L100: 100 cm³/rev (6.10 in³/rev), 450 bar max, rated 3300 rpm, max 3650 rpm, theoretical flow 330 L/min

• 90R130 / 90L130: 130 cm³/rev (7.93 in³/rev), 450 bar max, rated 3100 rpm, max 3400 rpm, theoretical flow 403 L/min

• 90R180 / 90L180: 180 cm³/rev (10.98 in³/rev), 450 bar max, rated 2600 rpm, max 2850 rpm, theoretical flow 468 L/min

• 90R250 / 90L250: 250 cm³/rev (15.25 in³/rev), 450 bar max, rated 2300 rpm, max 2500 rpm, theoretical flow 575 L/min

Series 90 Control Options:

• MA / MB: Manual Displacement Control (MDC) — mechanical input signal via four-way servo valve driving double-acting servo piston

• KA / KP / KT: Electrical Displacement Control (EDC) — proportional solenoid precisely adjusts swashplate angle

• CA / DC / DD: Pressure / Load sensing control

• HF: Hydraulic pilot control

• Other options: Customized per specific application requirements

Companion Model Reference:

• 90R075MA1BC60S3C7E03GBA353520: 75 cm³/rev, same MA manual displacement control configuration

• 90R130MA1BC60S3C7E03GBA353520: 130 cm³/rev, same MA manual displacement control configuration

Key Technical Advantages

1. MA Manual Displacement Control — Precise and Reliable Manual Variable Adjustment

The 90R100MA1BC60S3C7E03GBA353520 is equipped with MA manual displacement control (MDC), converting a mechanical input signal to a hydraulic signal via a four-way servo valve to drive a double-acting servo piston for swashplate angle adjustment. This control method features simple construction, direct operation, and excellent contamination resistance, particularly suitable for applications requiring operators to manually adjust flow based on operating conditions. The linear relationship between control input signal and displacement provides precise, tactile control feel. MA control requires no electrical connections, reducing electrical failure risk and offering significant reliability advantages in harsh construction machinery operating environments.

2. Closed Circuit Design — Efficient Hydrostatic Transmission

Series 90 pumps employ a closed circuit design in which hydraulic fluid circulates in a closed loop between pump and motor, with only leakage flow replenished by the integral charge pump. Compared to open circuits, closed circuits offer higher system efficiency and more compact plumbing — ideal for travel drive applications requiring bidirectional infinitely variable speed. The integral charge pump provides system replenishing and cooling oil flow as well as control fluid flow, ensuring the main circuit remains filled with hydraulic fluid, effectively preventing cavitation and maintaining system stiffness. The pump achieves smooth output direction reversal through the swashplate neutral position without additional directional valves.

3. High Power Density and Compact Lightweight Design — 450 bar from 49 kg

The Series 90 is positioned by Danfoss as an “advanced technology” platform, renowned for exceptional high power density and compact lightweight design. The 90R100MA1BC60S3C7E03GBA353520 weighs only approximately 49 kg at 100 cm³/rev displacement, delivering theoretical flow of 330 L/min at maximum working pressure of 450 bar. The parallel axial piston/slipper concept with tiltable swashplate achieves efficient power transmission within a compact housing. The compact structural dimensions enable easy integration into mobile machinery with limited installation space such as concrete mixer trucks and road rollers.

4. PLUS+1™ Compliant Interface and Flexible System Integration

Series 90 pumps feature standardized connector interfaces with PLUS+1™ compliant control and sensor options, facilitating integration with Danfoss electronic control systems. The series offers a wide range of auxiliary mounting pad options for mounting auxiliary hydraulic pumps to extend system functionality. The integral charge pump provides system replenishing and cooling oil flow as well as stable control fluid supply for the pilot control circuit. These features provide exceptional integration flexibility in multi-circuit hydraulic systems, reducing the number of independent power units and lowering piping complexity and installation costs.

5. Exceptional Field Interchangeability and Broad Compatibility

The 90R100MA1BC60S3C7E03GBA353520 features mounting flange, splined shaft, and port layouts conforming to Sauer Danfoss Series 90 standards, enabling drop-in interchangeability with other 90R100 configurations as well as same-frame 90R075 and 90R130 products. The Series 90 covers a wide displacement range of 42–250 cm³/rev within a shared mounting flange system, offering MA (manual), KA/KP (electrical proportional), CA/DC (pressure/load sensing), and other control options for flexible selection in system design and equipment maintenance, dramatically reducing equipment downtime.

Application Areas

• Concrete Mixer Trucks: Mixing drum drive hydraulic systems, with MA manual displacement control enabling operators to adjust flow based on mixing conditions

• Road Rollers: Vibratory roller travel drive and vibration hydraulic systems, closed circuit enabling precise speed control

• Asphalt Pavers: Paver travel drive and material feed system hydraulic power sources

• Excavators: Small excavator travel and swing drive hydraulic systems

• Skid Steer Loaders: Travel drive hydrostatic transmission systems

• Forklifts: Travel drive and lift hydraulic systems

• Aerial Work Platforms: Scissor lift and boom lift travel and steering hydraulic drives

• Municipal Vehicles: Sweeper, snow removal, and sanitation vehicle working device hydraulic drive systems

• Industrial Hydraulic Power Units: Fixed hydraulic power units and test bench closed-circuit power sources

The 90R100MA1BC60S3C7E03GBA353520 is ideally suited for closed-circuit hydrostatic drive systems requiring 450 bar continuous working pressure and displacements in the 100 cm³/rev range — the classic configuration for concrete mixer truck and road roller travel drive hydraulic systems.

Expert Maintenance Tips

1. Shaft Alignment and Coupling Requirements

Maintain concentricity between the pump shaft and drive shaft within 0.05 mm. Flexible couplings are strongly recommended to accommodate minor angular misalignment. The 90R100MA1BC60S3C7E03GBA353520 weighs approximately 49 kg — use appropriate lifting equipment during installation and never strike the shaft end. Tighten mounting flange bolts in diagonal sequence to the specified torque. The splined shaft engagement with the drive coupling should ensure sufficient spline engagement length.

2. Pre-Start Charge Pump Priming Procedure

As a closed-circuit pump, the 90R100MA1BC60S3C7E03GBA353520 must be slowly filled through the charge pump suction port or case drain port with clean hydraulic oil before initial startup. Confirm the suction line is fully primed before starting the charge pump to prevent dry-running damage. Start the pump in jog mode until charge pressure is established before applying load. After initial startup of the closed-circuit system, run at low pressure for 10–15 minutes and check charge pressure and case drain flow.

3. MA Manual Displacement Controller Operation and Commissioning

The MA manual displacement controller converts a mechanical input signal to a hydraulic signal via a four-way servo valve to drive a double-acting servo piston. During commissioning, verify the linear relationship between mechanical input signal and displacement. First set the control handle to neutral and confirm zero pump displacement with no output flow, then gradually operate the handle to verify displacement response matches the setpoint. MA control requires no electrical connections for simple maintenance. The servo spool within the control mechanism should be kept clean to prevent contamination-induced control sticking.

4. Fluid Cleanliness and Filtration

The 90R100MA1BC60S3C7E03GBA353520 requires fluid cleanliness of ISO 18/16/13 or better. Use pressure line filters with a filtration ratio β10 ≥ 75 (per ISO 4572). The charge pump pressure line filter should be replaced after the first 500 hours of operation, then every 1000–2000 hours or per contamination indicator signal. The case drain line should be independently routed to the reservoir, avoiding shared return lines. Recommended oil viscosity range is 9–110 cSt.

5. Restart Procedure After Extended Shutdown

If the pump has been idle for more than 30 days, manually rotate the shaft several turns to verify free rotation before restarting. Check for abnormal leakage at the case drain port. After startup, operate at low pressure for 10–15 minutes until charge pressure stabilizes and oil temperature reaches normal operating range before applying full load. In closed-circuit systems, pay particular attention to charge pump operation status and charge filter differential pressure.