Excavator PC138US-2E1 708-1L-00551 Final Drive For Excavator Travel Motor Shaft Pc138-8

The hydraulic pump of an excavator is the core component of the hydraulic system, providing power to the entire system like a heart. It converts the mechanical energy of the engine into hydraulic energy, drives the hydraulic cylinder and hydraulic motor to work, and thus completes various actions of the excavator.

Two types

Gear pump: With a simple structure, low cost, and strong anti pollution ability, but with large flow pulsation and high noise, it is mostly used in small excavators or auxiliary systems.

Piston pump: with complex structure and high cost, but high working pressure, large flow rate, high efficiency, and high control accuracy, it is widely used in medium and large excavators.

Kawasaki plunger pump and hydraulic motor series
1. K3V series: K3V63DT/BDT, K3V112DT/BDT, K3V140DT, K3V180DT
2. NV series: NV45, NV50, NV64, NV84, NV90, NV111, NV137, NV172, NV237, NV270, NVK45
3. KVC series: KVC925, KVC930, KVC932
4. MX series: MX50, MX150, MX170, MX173
5. M2X series: M2X55, M2X63, M2X96, M2X120, M2X146, M2X150, M2X170, M2X210
6. M5X series: M5X130, M5X160, M5X180

Piston pump and motor series for Komatsu excavator:
HPV35 (PC200-3/5, PC120-3/5)
HPV55 (PC100-3/5, PC120-3/5)
HPV90 (PC200-3/5, PC220-3/5)
HPV160 (PC300-3/5, PC400-3/5)
KPV90 (PC200-1/2)
KPV100 (PC300-1/2, PC400-1/2)
HPV95 (PC200-6/7, PC220-6/7)
KMF90 (PC200-3/5, PC220-3/5)
KMF160 (PC300-3/5, PC400-3/5)

Hitachi (HITACHI) excavator hydraulic plunger pump series
HPV125B (UH07-7, UH083)
HPV125A (UH09-7, UH10-1/2)
HPV116 (EX200-1, EX220-1)
HPV091 (EX200-2/3, EX220-2/3)
HPV102 (EX200-5, EX220-5)
HPV105 (ZAXIS200/220)
HPV145 (EX300-1/2/3/5)

Working principle

Oil suction process: The plunger moves backwards, the pump chamber volume increases, forming a vacuum, and the hydraulic oil in the oil tank enters the pump chamber under atmospheric pressure.

Oil pressure process: The plunger moves forward, the pump chamber volume decreases, the hydraulic oil is compressed, the pressure increases, the oil outlet valve is pushed open, and high-pressure oil enters the hydraulic system.

performance parameter

Displacement: The volume of oil discharged by the pump shaft per revolution determines the working speed and force of the excavator.

Pressure: The pressure of the oil at the pump outlet determines the working capacity of the excavator.

FAQ:

What is the warranty time of the products?
The warranty time is 6/12 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, stocking time is 1-7 days.
3.What are your main products ?
We are specialized in spare parts for excavator hydraulic system, such as travel/swing motor, travel/swing gearbox/parts, hydraulic pump/parts,gear parts,etc.If you need other excavator parts, we also can supply as your requirements.
4.How can I do if there is something wrong with the goods?
First at all, we have confidence in the quality of our products, if you really found something wrong, please provide pictures or video for us and we will check. After it is confirmed, please return the goods to us and we will offer the correct item.
5.How do I pay?
You can pay by T/T,PayPal (for small amount) and trade assurance.