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ZX850-3 ZX650-3 EX1200-6 Excavator Main Pump 4635645 K3V280 For Hitachi Spare Parts

GZ Yuexiang Engineering Machinery Co., Ltd.
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ZX850-3 ZX650-3 EX1200-6 Excavator Main Pump 4635645 K3V280 For Hitachi Spare Parts

ZX850-3 ZX650-3 EX1200-6 excavator main pump 4635645 K3V280 for Hitachi spare parts


PRODUCT DESCRIPTION
Model: ZX850-3 ZX650-3 EX1200-6 excavator hydraulic pumpAtegory: Hydraulic Pump
Part number: 4635645 K3V280Place of Origin:Other Country
Condition: Original & OemWarranty: 6 months
MOQ: 1 pcsProduction Capacity: 1000pcs /Month
Standard or Nonstandard: StandardPayment Term: L/C,T/T, Tradeassurance
Delivery Time: 1-3 days (depend on order)Means of Transport: By Sea, Air or DHL
Guarantee: We will check and send detailed pictures to buyers for confirmation

We could supply the hydraulic pump and also the inner spare parts as below model:


DX255K1025496
EC36014566659
Zx450-19184686
EC30014632316
Zx450-34633472
K5V200DT-9N-17T
K5V200DT-9C-17T
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
ZX200-19195235
EC70014621492
R36031NA-10010
E260LCK5V140DTP-9T1L-17T
JCB330925334

Open-Circuit Pump vs. Closed-Circuit System Application in Excavators:
This description focuses on the core system principle difference and how pump selection dictates function suitability. Principle: An open-circuit pump draws fluid from a reservoir, pressurizes it, sends it through control valves to actuators (cylinders, motors), and the return fluid from the actuators flows back to the reservoir. Fluid constantly cycles through the tank. Axial piston (variable disp.), gear, and vane pumps are typically used here. A closed-circuit pump (as described previously) circulates fluid primarily in a sealed loop between the pump and a motor, with only a small charge pump drawing from/replenishing to the reservoir. Structural Implications: Open-circuit pumps have dedicated inlet (suction) ports connected to the reservoir and outlet (pressure) ports feeding the valve manifold. They require a larger reservoir for cooling and de-aeration. Closed-circuit pumps have two main working ports (A & B) directly connected to the motor and an integral charge circuit connected to the reservoir. Excavator Application & Pump Selection: Open-circuit systems dominate the implement hydraulics (boom, arm, bucket, blade, swing typically) because multiple actuators share a common pump and reservoir, controlled by valves. The flexibility, ability to easily handle multiple functions simultaneously via valves, and suitability for linear cylinders make variable displacement axial piston pumps (often pressure-compensated or load-sensing) the ideal choice here. Closed-circuit systems excel in driving rotary travel motors (and sometimes swing) due to their efficiency in bi-directional power transmission, inherent braking, and controllability.



FAQ

1.What is the warranty time of the products?

The warranty time is 3/6 months based on the item details; We don't provide warranty time for original and used products.

2.What is your delivery time?

Generally, we will arrange the goods within 24 hours after your payment; if not in stock, the delivery time will be communied in advance, usually 3-7 days

3.What are your main products ?

We are specialized in spare parts for excavator hydraulic system, such as travel motor,swing motor, travel gearbox,swing gearbox,gear parts, hydraulic pump,hydraulic parts,etc.If you need other excavator parts, we also can supply as your requirements.

Quality ZX850-3 ZX650-3 EX1200-6 Excavator Main Pump 4635645 K3V280 For Hitachi Spare Parts for sale
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