Hydraulic pressure dropping or slow cycle times on your ZX120? A worn HPK055K pump lets the rotating group bypass internally, starving every circuit. The HPK055K is a Hitachi main pump used on ZX120, ZAX120 excavators. RITO rebuilds this main pump to OEM clearances so your machine's dig force and speed come back from the first hour.
Item NO.:
HPK055KOrder(MOQ):
1pcsPayment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANShipping Port:
Huangpu,GuangzhouLead Time：
In StockHPK055K Excavator Main Hydraulic Pump for Hitachi systems on ZX120, ZAX120 excavators. Precision-machined barrel bores and lapped valve face restore volumetric efficiency, while the factory-calibrated regulator maintains stable pressure-flow output.
| Part Number | HPK055K |
|---|---|
| Part Name | Excavator Hydraulic Main Pump (Piston Pump) |
| Compatible Brand | Hitachi (HPK055K) |
| Applicable Models | ZX120, ZAX120 Excavator |
| Application | Main hydraulic pump for ZX120, ZAX120 excavator all-function operation |
| Material | High-strength alloy steel |
| Product Color | Metallic industrial finish |
| Working Temperature | -25°C~+60°C |
| Key Function | Generates main hydraulic flow and pressure for work circuits |
| Condition | 100% New Aftermarket OEM Quality |
| Packaging | Wooden Case Reinforced Carton Neutral Packing Customized Box |
The HPK055K components are machined to OEM clearance for correct fit and restored volumetric efficiency on ZX120, ZAX120 machines.
High-grade alloy steel and phosphor bronze construction withstand the pressure loads of Hitachi systems in continuous duty.
Supplied ready for installation with the components required to rebuild the HPK055K drive group in one order.
The HPK055K covers ZX120, ZAX120 - one part number serving multiple machine models.
FAQ
Q: Which excavator models does the HPK055K fit?
A: The HPK055K is used on ZX120, ZAX120 excavators. Confirm your machine model and serial number for exact application.
Q: What symptoms indicate the HPK055K needs replacing?
A: Main circuit pressure falls below specification, all functions slow, and case-drain flow exceeds the OEM limit.
Q: What is included with the HPK055K?
A: The HPK055K is supplied as a complete assembly/kitset ready for installation. Confirm exact scope with our team for your machine.
Q: How to confirm the HPK055K is the correct part for my machine?
A: Match the part number HPK055K and confirm the machine model is ZX120 / ZAX120. Provide the machine serial number for cross-reference.
Q: What quality options are available?
A: We provide original, OEM and high-quality aftermarket versions with stable supply capability.
Q:Why Choose RITO?
A:Listed Factory
Stable&Reliable Quality
OEM Factory for Chinese Top Excavator Brands
Supplier to Fortune 500 Companies
RITO Hydraulic Pump Cylinder Block 141634 is designed for EX200-1, EX220-1, HPV116, and HMG32 main pumps. For distributors and agents: standardized dimensions ensure drop-in replacement, reducing return rates. Mining customers benefit from high-wear resistance, minimizing unplanned pump failures.
View More
This RITO 720773 Cylinder Block Front is a critical core component for K3V112DT, K3V63, and K3V140 excavator hydraulic pumps, forming part of the rotating group assembly. It works with pistons and valve plates to ensure stable pressure generation, precise flow output, and efficient hydraulic performance in construction environments.
View More
Hydraulic efficiency loss in excavators leads to sluggish cycles and high fuel costs. Worn cylinder blocks and valve plates cause internal leakage, paralyzing your fleet. The 720773 and K3V112DT series resolve these critical failures, restoring system pressure for heavy-duty construction demands.
View More
Worn piston shoes cause catastrophic internal friction and pressure loss in main pumps, leading to expensive machine downtime. The 704543A slipper addresses these vulnerabilities. Engineered for high-load mining, it prevents "slipper tilt" and scoring that often plagues inferior low-cost parts.
View More
The RITO Hydraulic Pump Valve Plate 641202 is designed for high-efficiency and durable performance in demanding excavator applications such as the Komatsu PC200-7, PC200-8, and MB85. Whether for wholesale or direct mining applications, this valve plate improves hydraulic flow and pump reliability. Unlike traditional valve plates, it ensures a longer operational lifespan, reducing maintenance costs and downtime. This makes it a critical component for heavy-duty machinery in challenging environments. The 641202 enhances performance by providing superior seal integrity and operational stability, crucial for minimizing operational disruptions.
View More
Facing frequent downtime & high replacement costs on excavator friction parts? RITO Bronze Friction Plate 648012 solves core pain: unstable friction, rapid wear & poor heat resistance. Ideal for wholesalers, agents & mine clients; fits Komatsu PC160-7, JCB JS160, Takeuchi TB135, MSF85P. Delivers consistent torque, lower maintenance & longer service life.
View More
Generic separators fail in heavy mining/construction, causing premature wear, hydraulic system damage, and costly delays. Solution：RITO Steel Separation Plate 648013 delivers OEM-grade durability, perfect fit for Komatsu PC160-7, JCB JS160, Takeuchi TB135, MSF85P, and reliable aftermarket support to cut costs and maximize uptime.
View More
Mine/wholesalers/agents face unplanned downtime, poor part compatibility, and high maintenance costs on CAT E320C/SBS120/SBS140. Generic actuators leak, fail fast, and delay projects, eroding profits. RITO 204-2683-DM is OEM-grade, direct-fit, and built for harsh mining/construction. It cuts downtime, lowers costs, and boosts resale value.
View MoreLeave A Message
Scan to wechat :
