204-2578 plunger pump For Caterpillar D8R and D8T crawler bulldozer

204-2578 plunger pump For Caterpillar D8R and D8T crawler bulldozer Featured Image
  • 204-2578 plunger pump For Caterpillar D8R and D8T crawler bulldozer

Short Description:

Lovol 510 hydraulic fan pump is aftermarket replacement spare part for Lovol FR510 large mining excavator. It supplies pressurized hydraulic oil to drive cooling fan motor for engine temperature control.

Product Detail

Product Tags

description

204-2578 axial variable piston pump serves as the core hydraulic power unit for CAT D8R and D8T crawler bulldozer, driven by C15 engine. It converts mechanical power into adjustable high-pressure hydraulic energy for blade, steering and ripper hydraulic systems. Built-in load sensing control valve dynamically changes pump displacement. During heavy rock pushing or deep ripping, it delivers large flow and high pressure; during light load travel or fine leveling, it reduces displacement to save fuel and lower hydraulic heat accumulation. Internal components including plungers, cylinder block, valve plate and slippers are made of high-strength alloy steel, processed by precision grinding and nitriding hardening. The friction pair maintains stable volumetric efficiency under cyclic impact load of repeated heavy pushing. Reinforced cast iron housing is treated by stress relief annealing to eliminate casting residual stress, resisting strong vibration and rock dust contamination in mining sites.

product parameters

Part No：204-2578
Product Type：Variable Displacement Axial Piston Pump
Applicable Equipment：CAT D8R, D8T Crawler Bulldozer, C15 Engine
Control Mode：Load Sensing Swash Plate Control
Nominal Working Pressure：30 MPa (300 bar)
Max Instantaneous Peak Pressure：35 MPa (350 bar)
Working Medium：ISO VG46 Anti-wear Hydraulic Oil
Working Temperature Range：-25℃ ~ +112℃
Main Material：Reinforced cast iron housing, high-strength alloy steel internal parts, FKM fluorine rubber seal
Surface Treatment：Precision grinding, nitriding hardening, stress relief annealing, anti-rust coating
Shaft Specification：Original standard splined shaft
Interchangeability：1:1 OEM interchangeable, direct bolt-on installation
Product Condition：Brand new aftermarket part, 100% hydraulic bench tested
Packaging：Independent anti-rust packaging + export wooden case
Storage Environment：Dry indoor storage, moisture-proof, impact-proof, anti-corrosive gas

advantage

- Load response optimized for intermittent heavy rock pushing and ripping cycles
The load sensing curve is specially tuned for bulldozer cyclic working mode. It rapidly builds pressure when cutting hard rock and automatically reduces flow during traveling, lowering fuel consumption during long-duration mine stripping operation.
- Multi-action flow matching for simultaneous blade tilt and ripper operation
Balanced flow distribution ensures blade lifting, tilting and ripper work at the same time without obvious pressure drop, maintaining stable cutting force during compound action for rock excavation.
- Heavy shock-resistant housing for bulldozer harsh impact working condition
Thickened rib-reinforced housing structure absorbs impact loads generated when the blade hits rock obstacles, reducing risk of housing deformation and crack under sudden impact.
- Nitrided friction pair, strong wear resistance under rock dust environment
Nitriding treatment on plunger and valve plate improves surface hardness, reducing abrasive wear caused by rock dust particles mixed in hydraulic oil on mining sites.
- Bulldozer duty cycle bench test simulating rock stripping condition
Each pump undergoes cyclic test simulating rock pushing and ripping duty cycle, verifying stability under repeated heavy impact loading for continuous mine stripping work.

FAQ 

Q1: Which machine does 204-2578 plunger pump fit?
A1: This hydraulic plunger pump is designed for CAT D8R and D8T crawler bulldozer with C15 engine, supplying hydraulic power for blade, ripper and steering system. It cannot be directly used on other D-series bulldozers without serial number confirmation. Confirm machine serial number before purchase.

Q2: What hydraulic functions does this pump support?
A2: It provides pressurized hydraulic oil for blade lifting, lowering, tilting, steering and rear ripper operation. It is widely used in mine overburden stripping, large-scale earthmoving and site grading projects.

Q3: What are typical signs of pump wear?
A3: Typical symptoms: insufficient pushing force when pushing hard rock, slow blade tilting speed under heavy load, pressure fluctuation during impact, abnormal pump noise, heat rise under continuous heavy duty and shaft seal oil leakage.

Q4: What inspections should be done before installing new pump?
A4: Inspect blade cylinders, ripper cylinder, multi-way valve and filter elements. Fully flush hydraulic tank and pipelines to remove metal debris. Replace degraded hydraulic oil before assembly.

Q5: Why bulldozer still lacks pushing force after pump replacement?
A5: The fault may not come from pump. Check relief valve calibration, stuck spool, blocked filter, damaged cylinder seals or trapped air in hydraulic circuit. Air bleeding must be completed after installation.

warehouse

We have built four spare parts warehouses in Xuzhou, Jining, Kunshan and Changsha to provide customers from all over the world with a variety of high-quality spare parts. We can basically ship self-provided spare parts within three days after confirming the order. If the spare parts need to be adjusted or processed, they will be shipped within 7-30 days.

our warehouse

our warehouse

Pack and ship

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