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Belparts M322C hydraulic pump assy 240-0142 1979996 used Excavator main pump OEM

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Belparts M322C hydraulic pump assy 240-0142 1979996 used Excavator main pump OEM

Belparts M322C hydraulic pump assy 240-0142 1979996 used Excavator main pump OEM

Belparts M322C hydraulic pump assy 240-0142 1979996 used Excavator main pump OEM

We specialize in providing high-quality excavator hydraulic components to keep your machinery running at peak performance. Our core product range covers swing motors, swing motor assemblies, hydraulic pumps, and a full line of essential hydraulic parts—all engineered to meet strict industry standards for durability and reliability.
Whether your equipment is from leading brands like Kato, Hyundai, Mitsubishi, Komatsu, or Hitachi, we have the precise parts to fit your specific model. No matter the size of your project or the type of excavator you operate, our comprehensive inventory ensures you get the right components when you need them, minimizing downtime and maximizing productivity.
Count on us for consistent quality, competitive pricing, and responsive service—your go-to source for excavator hydraulic solutions.
DX255K1025496
EC36014566659
Zx450-19184686
EC30014632316
Zx450-34633472
PC200-8708-2L-00500
PC200-7708-2L-00300
PC200-8708-2L-00400
PC130-7PC130-7 708-1L-00651
SK480K3V180DTH-9TOU
K5V200DTH31QB-10011
PC300-7708-2G-00024
PC400-6708-2H-00191
PC400-7708-2H-00026
SBS120272-6955
ZX200-19195235
EC70014621492
R36031NA-10010
E260LCK5V140DTP-9T1L-17T
JCB330925334
PC400-7PC400-7 708-2H-00453
Hydraulic pumps are the "heart" of hydraulic systems, powering excavators, loaders, and industrial presses. They convert mechanical energy (from engines or motors) into hydraulic energy via energy conversion and fluid displacement, driving machinery movement with pressurized fluid.​
Their work has three key stages. In the suction phase, internal parts (gears, pistons, or vanes) create a low-pressure vacuum in the inlet chamber, pulling fluid from the reservoir through a one-way valve.​
Next, the compression phase: rotating or reciprocating parts reduce the fluid chamber’s volume, sharply increasing fluid pressure—adjusted for tasks, from light work (low pressure) to heavy operations like excavator arm lifting (high pressure).​
In the discharge phase, pressurized fluid exits through an anti-backflow outlet valve into the system. It acts on actuators (cylinders/motors) to generate motion, powering functions like digging or lifting.​
Common pump types (gear, piston, vane) follow this cycle but differ in design: gear pumps use meshing gears, piston pumps sliding pistons, and vane pumps rotating vanes. All rely on tight seals and precise alignment to avoid leakage, ensuring efficient energy transfer for heavy machinery.
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