TMP089 TMP070 TMM089 Series Hydraulic Pump & Motor | PMP Industries Replacement | Concrete Mixer Truck Drive

Chengyuan Hydraulic offers high-performance TMP/TMM series axial piston pumps and motors, meticulously engineered as professional-grade replacements for PMP Industries concrete mixer drive systems. This lineup, featuring the TMP070/089 variable pumps and TMM070/089 fixed motors, serves as the heart of 6-12 $m^3$ transit mixers globally.

Recognizing the harsh environments and heavy-duty duty cycles of construction sites, Chengyuan has optimized the cylinder block and valve plate durability. Our products guarantee 100% Drop-in Interchangeability with original PMP components in terms of mounting interfaces and performance logic. Supported by our 100% Simulation Load Testing, every unit is validated at pressures exceeding 400bar to ensure maximum volumetric efficiency and zero-leakage performance during critical drum rotations.

Technical Specifications 

• Compatible Brand: PMP Industries (Replacement)

• Core Models: TMP070, TMP089 (Pumps) / TMM070, TMM089 (Motors)

• Max Displacement: 70.3 $cm^3$/rev (070 series) / 89.2 $cm^3$/rev (089 series)

• Rated Pressure: 400 Bar (40 MPa)

• Peak Pressure: 450 Bar (45 MPa)

• Max Speed (Pump): 3800 rpm

• Max Speed (Motor): 4100 rpm

• Control Type: Manual Servo (MS) or Hydraulic Proportional

• Housing Material: High-strength Ductile Iron

• Sealing: High-temperature FKM (Viton) for continuous summer operation

Key Technical Advantages:

• Heavy-Duty Bearing Architecture: Engineered for the uneven loads and vibrations of mixer trucks, we utilize oversized tapered roller bearings. This enhances radial and axial load capacity, extending service life by over 20% compared to standard designs.

• Highly Integrated Valve Suite: The TMP pump features a built-in charge pump, high-pressure relief valves, and charge relief valves. This integrated design reduces the footprint and minimizes external piping, significantly cutting down potential leak points.

• Bi-Metal Porting Technology: The interface between the cylinder block and valve plate utilizes a bi-metal sintering process. Combined with precision lapping, this maintains superior volumetric efficiency and minimizes heat generation even at 450bar.

• Balanced Piston-Slipper Design: Employs hydrostatic balancing between the piston and slipper, drastically reducing friction losses. This ensures smooth, constant torque output even at the extremely low RPMs required for drum agitation.

Application Areas:

• Concrete Transit Mixers: Fits all major 6$m^3$ to 12$m^3$ truck models.

• Construction Machinery: Various heavy-duty closed-loop drive systems.

• Road Maintenance: Propulsion drives for cold millers or pavers.

Expert Maintenance Tips:

• Case Flushing: Before the initial start-up, you MUST fill the pump and motor housing with clean hydraulic oil through the drain port. Dry starting will cause immediate catastrophic damage to the pistons and bores.

• Charge Pressure Monitoring: Closed-loop systems are highly sensitive to charge pressure. Regularly verify that charge pressure remains within the 18-22 Bar range to prevent cavitation.

• Cold Start Protocol: In cold climates, perform a 10-minute low-speed warm-up until the oil temperature exceeds 20°C. This protects the seals and cylinder block from thermal shock and high-viscosity drag.