T90R100MADNN T90M100NC0 Parker Piston Pump 100cc 420bar

Product Overview

The T90R100MADNN8AS3DCF03MIX424220 and T90M100NC0NDN0C6W00MIX0000F0 are the 100 cc-class core models within the Parker T90 series of axial piston pumps and motors. The T90 series is Parker’s high power density hydraulic platform specifically designed for closed-circuit hydrostatic transmissions, comprising variable displacement pumps (T90R) and fixed displacement motors (T90M), spanning displacements from 42 to 250 cm³/rev with continuous working pressures up to 420 bar and peak pressure of 480 bar, widely deployed in concrete mixer drum drives, construction machinery travel drives, and industrial hydraulic systems.

The T90 series employs a swashplate design with parallel-arranged axial piston/slipper concept, achieving variable displacement by altering piston stroke via an angle-adjustable swashplate. The direction of pump outlet oil changes with swashplate orientation, enabling forward/reverse switching of the motor output shaft. The integrated charge pump supplies supplementary hydraulic fluid, cools the oil, and provides the pressure oil required for control functions, with multiple auxiliary mounting pads on the rear end cover for series pump configurations.

About the T90 Pump vs. Motor Distinction: The T90R is a variable displacement pump (R = Pump) with a tiltable swashplate for stepless displacement adjustment, integrated charge pump, and control system. The T90M is a fixed displacement motor (M = Motor) with a fixed swashplate design, capable of intake/discharge through either port, with bidirectional rotation capability and optional loop flushing for additional cooling and fluid cleaning.

Model Code Breakdown (for procurement and engineering reference):

Using T90R100MADNN8AS3DCF03MIX424220 as example:

• T90R: T90 series variable displacement pump

• 100: Nominal size (NG), geometric displacement 100 cm³/rev

• MA: Control type — Manual Displacement Control (MDC), converting a mechanical input signal to a hydraulic signal using a spring-centered four-way servo valve, with pump swashplate angular position proportional to control input rotation

• DNN: Port and mounting configuration code

• 8AS: Shaft and auxiliary mounting flange configuration code

• 3DCF03: Control valve design number and factory calibration code

• MIX: Application identifier — for concrete mixer applications

• 424220: Factory batch and serial number

Using T90M100NC0NDN0C6W00MIX0000F0 as example:

• T90M: T90 series fixed displacement motor

• 100: Geometric displacement 100 cm³/rev

• NC0N: Configuration code

• DN0C6: Port and mounting configuration

• W00: Additional function code

• MIX: Application identifier — for concrete mixer applications

• 0000F0: Factory calibration and batch identifier

Drop-in Replacement Advantage: Manufactured to exact Parker OEM specifications, these pumps/motors achieve complete drop-in interchangeability with the original T90 series for SAE mounting flange, shaft dimensions, SAE main port layout, and control module interface. Every pump/motor undergoes 100% simulated load testing prior to shipment, validating 420 bar pressure loading, control response, and volumetric efficiency under conditions replicating real-world duty cycles.

Technical Specifications 

T90R100 Variable Pump:

• Model Code: T90R100MADNN8AS3DCF03MIX424220

• Series: Parker T90 Series (Closed Circuit, Swashplate Variable Pump)

• Nominal Size: 100

• Geometric Displacement: 100 cm³/rev (6.1 in³/rev)

• Rated Working Pressure: 420 bar (6090 psi)

• Peak Pressure: 480 bar (6960 psi)

• Maximum Case Pressure: 5 bar (72.5 psi)

• Rated Speed: 3000 r/min

• Maximum Speed: 3200 r/min

• Theoretical Flow at 3000 rpm: 300 L/min (79.3 GPM)

• Maximum Torque: 2.07 N·m/bar

• Control Type: MA — Manual Displacement Control (MDC)

• Integrated Charge Pump: Standard, approx. 32 cm³/rev

• Rotation: Right-hand (viewed from shaft end)

• Mounting Flange: SAE standard flange

• Shaft: SAE splined or keyed shaft

• Housing Material: High-strength cast iron

• Seal Material: NBR (nitrile rubber), high-pressure shaft seal

• Working Fluid: ISO VG32 / VG46 anti-wear hydraulic oil

• Fluid Cleanliness: ISO 4406 18/15 or better

• Weight: Approx. 68 kg (net)

T90M100 Fixed Motor:

• Model Code: T90M100NC0NDN0C6W00MIX0000F0

• Series: Parker T90 Series (Fixed Displacement Axial Piston Motor)

• Nominal Size: 100

• Geometric Displacement: 100 cm³/rev

• Maximum Working Pressure: 420 bar (6090 psi)

• Peak Pressure: 480 bar (6960 psi)

• Rated Speed: 3300 r/min

• Maximum Speed: 3650 r/min

• Maximum Output Torque (Δp=350 bar): Approx. 557 N·m

• Rotation: Bidirectional (intake/discharge through either port)

• Loop Flushing: Optional flushing feature available

• Mounting Flange: SAE standard flange

• Housing Material: High-strength cast iron

• Seal Material: NBR (nitrile rubber)

• Working Fluid: ISO VG32 / VG46 anti-wear hydraulic oil

• Weight: Approx. 35 kg

T90 Series Displacement Size Reference:

• T90R042: 42 cm³/rev, rated 420 bar, max speed 3750 rpm

• T90R055: 55 cm³/rev, rated 420 bar, max speed 3500 rpm

• T90R075: 75 cm³/rev, rated 420 bar, max speed 3150 rpm

• T90R100: 100 cm³/rev, rated 420 bar, max speed 3200 rpm

• T90R130: 130 cm³/rev, rated 420 bar, max speed 2800 rpm

• T90R180: 180 cm³/rev, rated 420 bar, max speed 2500 rpm

• T90R250: 250 cm³/rev, rated 420 bar, max speed 2200 rpm

• T90M055: 55 cm³/rev, continuous 400 bar, peak 450 bar, max speed 3600 rpm

• T90M075: 75 cm³/rev, continuous 400 bar, peak 450 bar, max speed 3200 rpm

• T90M100: 100 cm³/rev, continuous 420 bar, peak 480 bar, max speed 3650 rpm

Note: Data compiled from Parker T90 series technical documentation and industry-published technical references.

Key Technical Advantages

1. Closed-Circuit Design with Integrated Charge System
The T90 series is specifically designed for closed-circuit hydrostatic transmissions. Compared to open-circuit systems, closed-circuit designs offer compact structure, higher efficiency, and smaller reservoir volume. The integrated charge pump supplies supplementary hydraulic fluid, cools the oil, and provides the pressure oil required for control functions, significantly simplifying system piping layout. The charge pump displacement of approximately 32 cm³/rev supplies the control with pressure to operate the swashplate and maintains minimum pressure in the low side of the transmission loop, ensuring stable closed-circuit operation under all conditions.

2. Manual Displacement Control (MDC) with Precise Operating Feel
The T90R100MADNN is equipped with Manual Displacement Control (MDC). MDC converts a mechanical input signal to a hydraulic signal using a spring-centered four-way servo valve, with the angular position of the pump swashplate proportional to the rotation of the control input. The MDC design enables operators to precisely and intuitively control pump displacement and direction, particularly suitable for concrete mixer drum drive and other applications requiring direct operator displacement control.

3. Swashplate Design with High Power Density
The T90 series employs a swashplate axial piston rotary group design with parallel-arranged axial piston/slipper concept, achieving variable displacement by altering piston stroke via an angle-adjustable swashplate. The 100 cc size delivers a theoretical flow of 300 L/min (at 3000 rpm) at 420 bar rated pressure, leading its displacement class in power density. The compact structural design makes the T90 series particularly suitable for space-constrained mobile hydraulic applications.

4. Bidirectional Variable Capability with Forward/Reverse Switching
The T90R variable pump’s outlet oil direction changes with swashplate orientation, enabling forward/reverse switching of the motor output shaft. This characteristic makes the T90 series an ideal choice for closed-circuit hydrostatic travel drives, achieving smooth forward/reverse switching by simply changing the swashplate angle without additional directional valves. The T90M fixed motor can intake/discharge through either port with bidirectional rotation capability, with optional loop flushing for additional cooling and fluid cleaning.

5. Extensive Control Options
The T90 series offers a wide range of control options to meet specific system requirements: standard pressure control (MMC), remote pressure control, load sensing (LS) control, horsepower/torque control (K=18.5kW/120Nm, M=22kW/142Nm, S=30kW/195Nm, T=37kW/240Nm, U=45kW/290Nm, W=55kW/355Nm, Y=75kW/485Nm, Z=90kW/585Nm, 2=110kW/700Nm), and electro-hydraulic proportional control, among others. Modular control designs enable field conversion and upgrade.

6. High-Strength Cast-Iron Housing with Long Service Life
The pump body is precision-cast from high-strength cast iron, with the material’s damping characteristics effectively suppressing structural vibration and fluid-borne noise. The T90 series is renowned for compact lightweight design and high power density, with robust construction suitable for continuous duty in demanding environments such as concrete mixer trucks. Multiple auxiliary mounting pads accommodate series pump configurations for compound hydraulic system expansion. The seal material is NBR (nitrile rubber), with standard configuration suitable for mineral oil-based hydraulic fluids.

Application Areas

• Concrete Mixer Trucks: Drum drive closed-circuit hydraulic systems (the core application area for the T90 series)

• Construction Equipment: Excavator travel drives, road roller travel hydraulic systems, wheel loader hydraulic drives

• Concrete Pump Trucks: Pumping system auxiliary hydraulic drives, boom hydraulic systems

• Mining Equipment: Mining truck hydrostatic drives, underground LHD hydraulic systems

• Agricultural Machinery: Combine harvester hydraulic drives, high-horsepower tractor closed-circuit transmissions

• Industrial Hydraulic Power Units: Closed-circuit hydraulic power units, test bench hydraulic systems

Expert Maintenance Tips

1. Hydraulic Fluid Cleanliness
The T90 series control spool operates with extremely tight clearances and is highly sensitive to particulate contamination. System fluid cleanliness must meet ISO 4406 18/15 or better. Recommended fluids are ISO VG32 or VG46 anti-wear hydraulic oils. Install a 10 μm absolute-rated filter element at the pump inlet. Replace elements at 500 hours after first commissioning, then every 1,000 operating hours or 6 months, whichever comes first.

2. Manual Displacement Controller (MDC) Maintenance
The T90R100MADNN is equipped with an MDC manual control module operating the servo valve through mechanical linkage. Regularly inspect the linkage mechanism for wear and clearance, ensuring normal operating feel and accurate response. Apply appropriate grease to linkage joints to prevent corrosion and binding. If abnormal increase in operating force or insensitive displacement control is observed, promptly inspect the servo valve and linkage mechanism. The MDC is equipped with a Neutral Start Switch (NSS); regularly check its function to ensure safe starting.

3. Charge Pressure Inspection and Maintenance
The T90 series integrated charge pump comes standard, with charge pressure providing cooling and leakage compensation flow for the closed circuit. Insufficient charge pressure causes piston slippers to lose contact with the valve plate, resulting in dry wear. Inspect the charge relief valve setting and sealing condition every 2,000 operating hours. The charge pump displacement is approximately 32 cm³/rev; periodically confirm that charge flow meets system cooling and leakage compensation requirements.

4. Case Drain Line Requirements
The case drain line must return directly to the reservoir. Maximum permissible case pressure is 5 bar (72.5 psi). The drain outlet must terminate below oil level at all times to prevent air ingestion. The drain line diameter must not be smaller than the pump case drain port size. For 100 cc class pumps, case drain flow is substantial — drain line design must fully account for flow demand.

5. Pre-Start Priming and Air Bleeding
Before first start, fill the pump housing with clean hydraulic fluid through the case drain port. After installation, turn the drive shaft by hand several revolutions to confirm free rotation without binding. Position the control at neutral (zero displacement) and run at low speed for 5–10 minutes. Verify continuous bubble-free flow from the case drain. Only after confirming adequate lubrication and charge pressure should the pump be loaded.

6. Splined Shaft and Coupling Maintenance
Both the T90R100 and T90M100 use SAE splined shafts. Ensure drive shaft alignment during installation, employing a flexible coupling. Apply appropriate grease to the spline connection to prevent fretting wear. Inspect coupling alignment and spline wear at 500 hours after first commissioning, then recheck every 2,000 operating hours.