Product Descriptio
| Pos. | Part No | Qty | Parts name |
| 4398514 | [1] | MOTOR;OIL | |
| 10 | 788801 | [9] | PISTON ASSY |
| 010A. | +++++++ | [1] | PISTON |
| 010B. | +++++++ | [1] | SHOE |
| 20 | 788802 | [1] | CASING ASSY |
| 020A. | +++++++ | [1] | CASING |
| 020B. | +++++++ | [2] | PIN;SPRING |
| 51 | 4451628 | [2] | VALVE;RELIEF |
| 051A. | A811030 | [2] | O-RING |
| 80 | 788803 | [1] | PLUNGER |
| 101 | 788804 | [1] | SHAFT |
| 111 | 788805 | [1] | CYLINDER |
| 114 | 788806 | [1] | SPRING;PLATE |
| 123 | 788807 | [1] | RETAINER |
| 124 | 788808 | [1] | PLATE |
| 131 | 788809 | [1] | PLATE;VALVE |
| 301 | 788810 | [1] | CASING |
| 351 | 409215 | [2] | PLUNGER |
| 355 | 409216 | [2] | SPRING |
| 390 | +++++++ | [1] | NAME-PLATE |
| 391 | 625509 | [2] | PIN |
| 401 | 365318 | [4] | BOLT;SOCKET |
| 443 | 788811 | [1] | BRG.;ROL. |
| 444 | 788812 | [1] | BRG.;ROL. |
| 467 | 629404 | [2] | PLUG |
| 469 | 692708 | [2] | PLUG |
| 472 | 425115 | [1] | O-RING |
| 487 | 957366 | [2] | O-RING |
| 488 | 4506428 | [2] | O-RING |
| 491 | 788813 | [1] | SEAL;OIL |
| 702 | 788814 | [1] | PISTON |
| 706 | 353321 | [1] | O-RING |
| 707 | 425117 | [1] | O-RING |
| 712 | 788815 | [24] | SPRING;BRAKE |
| 742 | 788816 | [3] | PLATE;FRICTION |
| 743 | 788817 | [4] | PLATE |
| 807 | 788818 | [1] | SPRING |
| 808 | 221509 | [1] | BALL;STEEL |
| 809 | 4506407 | [1] | O-RING |
| 813 | 263019 | [2] | PLUG |
| 982 | 628705 | [2] | PLUG |
| 984 | 694825 | [1] | PLUG |
| 985 | 788819 | [1] | PLUG |
Maintenance method
1. Avoid impact pressure damaging components
Impact pressure in the hydraulic pressure should be avoided during operation, as impact pressure will damage components. Each pressure valve and each flow valve must be reasonably adjusted strictly in accordance with the design requirements. After adjustment, the adjusting screws must be tightened securely.
2. Always pay attention to the temperature of the hydraulic station
The working temperature of the hydraulic system oil must not exceed 70°C, and should generally be controlled within the range of 35~60°C. If it exceeds the specified range, the cause should be checked and eliminated.
3. Maintain the quality of hydraulic oil
Select hydraulic oil according to the brand number specified in the instruction manual. The oil must be filtered before refueling. At the same time, the oil quality must be sampled and tested regularly. If the oil quality is found to be unsuitable for use, it must be replaced. Generally, it must be replaced every six months or every 2,000 working hours.
Theory
Piston pumps are generally divided into single plunger pumps, horizontal piston pumps, axial piston pumps and radial piston pumps. The structure mainly consists of eccentric wheel, plunger, spring, cylinder and two one-way valves. A closed volume is formed between the plunger and the cylinder bore. When the eccentric wheel rotates once, the plunger reciprocates once, moving downward to absorb oil and moving upward to discharge oil.
Packing
BY EXPRESS, AIR, SEA
About Xinfeng Machinery (XF) parts:
Xinfeng Machinery Parts Company was established in 1998. It is a professional team composed of high-quality technical personnel integrating production, maintenance, sales, and service. It is committed to providing customers with high-quality and efficient services. It is headquartered in Guangzhou, China.
We have been engaged in the excavator industry for 25 years. We sell original used parts, rebuilt parts,original new parts, and OEM new parts for many types.We can provide many types for you to choose from. We can provide a quality-trusted full range of hydraulic pumps, travel motors, final drives, main control valves, swing motors, and engines for KOMATSU, CATERPILLAR, HITACHI, JOHN DEERE, VOLVO, CASE JCB, KOBELCO, NEW HOLLAND, SUMITOMO, KATO, BOBCAT, DOOSAN, and HYUNDAI.
We provide a customer satisfaction guarantee on all our products. We have invested in providing only the highest-quality replacement parts to our customers. Develop a more broad business space together based on long-term, friendly, mutually beneficial, and win-win business relations.
FAQ
1. How to quickly and accurately buy products what lneeded?
A: Provide the original parts number to us to check.
2. lfI don't know the part number,what shouldI do?
A :Please send us size and pictures of old products.
3. What is the warranty of the products?
A: The warranty is 6/12 Months based on the specific product.
4. How long is your delivery time?
A: The normal delivery time is 3-5 days for stock sproductsafter getting payment. lf not in stock, we will inform you thetime requlred.
5.. What's your erms of packing?
7. What is your MOQ?
A: Small order and sample order are acceptable
8. Do you have any After-Sales service?
A: Yes!Our
