Hydraulic pressure unstable or pump case drain overheating on your ZX200-3 or ZX210-3? A worn 2051451 cylinder block lets internal leakage climb until the HMT36FA pump can no longer hold rated circuit pressure. RITO supplies this Handok-grade barrel with precision-bored cylinders and lapped valve face to recover full volumetric efficiency on your Hitachi excavator.
Item NO.:
2051451Order(MOQ):
1pcsPayment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANShipping Port:
Huangpu,GuangzhouLead Time：
In Stock2051451 Pump Cylinder Block for Hitachi HPV90 / HMT36FA piston pumps on ZX200-3, ZX210-3, ZX240, ZX180, ZX230 and ZX200-5G excavators. The HPV90 is the compact high-pressure pump widely fitted to 20-25 tonne Hitachi machines. Precise bore-to-piston clearance and a lapped valve-plate sealing face are critical to sustaining the volumetric efficiency that the Hitachi load-sensing system depends on.
| Part Number | 2051451 |
|---|---|
| Part Name | Pump Cylinder Block (HPV90 / HMT36FA) |
| Compatible Brand | Handok (Hitachi HPV90 / HMT36FA Pump) |
| Applicable Models | ZX200-3, ZX210-3, ZX240, ZX180, ZX230, ZX200-5G Excavator |
| Application | Rotating group barrel of Hitachi HPV90 / HMT36FA piston pump |
| Material | High-strength alloy steel |
| Product Color | Silver machined metal finish |
| Working Temperature | -25°C~+60°C |
| Key Function | Houses the piston bores that generate main hydraulic pressure in the HPV90 / HMT36FA pump |
| Condition | 100% New Aftermarket OEM Quality |
| Packaging | Wooden Case Reinforced Carton Neutral Packing Customized Box |
Cylinder bores honed to Handok-standard bore-to-piston clearance specification for the HPV90 / HMT36FA, restoring volumetric efficiency consistent with Hitachi OEM expectations.
Low internal bypass maintains the fast pump pressure response required by the Hitachi LS hydraulic system, preventing the standby pressure hunting that follows barrel wear.
Single part number 2051451 covers ZX200-3, ZX210-3, ZX240, ZX180, ZX230 and ZX200-5G, simplifying procurement for workshops servicing multiple Hitachi 20-25 tonne models.
Valve-plate mating surface lapped to Ra 0.2 to maintain the sealing precision that keeps HPV90 case-drain flow within Hitachi's OEM specification.
FAQ
Q: What causes HPV90 cylinder block wear on ZX200-3?
A: Contaminated hydraulic oil scoring barrel bores is the primary cause. Secondary causes include a clogged tank breather pressurising the tank, extended operation at maximum relief pressure, and prolonged high-temperature running without adequate cooling.
Q: Should I also replace piston shoes 8099321 when fitting a new 2051451 barrel?
A: Yes. If the old barrel failed due to bore wear rather than a one-off contamination event, the piston shoes are likely at similar wear life. Replacing barrel and shoes together is more cost-effective than a second disassembly.
Q: How do I flush the HPV90 circuit before fitting a new 2051451?
A: Drain the hydraulic tank, clean the tank interior, replace all filter elements including the suction strainer, and refill with fresh hydraulic oil before start-up. Run at low pressure for 30 minutes before applying full load.
Q: How to confirm 2051451 fits my ZX200-3 HPV90 pump?
A: Verify pump model is HPV90 or HMT36FA and existing barrel part number is 2051451. Provide pump serial number to our team 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
Struggling with erratic hydraulic pressure and frequent pump failures? The 267-1624-HD regulator assembly solves core mechanical instabilities in mining and construction fleets. This heavy-duty unit ensures precise flow control, outperforming OEM standards in high-load scenarios.
View More
Hydraulic pump instability can quickly lead to power loss, slow cycle times, and reduced digging efficiency in demanding construction environments. K5V140DT cylinder block valve plate is engineered for DH300, R290LC-7, SY305, and EC290 excavators, ensuring precise oil distribution and stable hydraulic pressure control within the main pump system.
View More
Hydraulic pump internal leakage or unstable pressure often originates from wear on the rotating group sealing interface, leading to reduced excavator efficiency and inconsistent digging force. K3V112DT-BD cylinder block valve plate is engineered for K3V112DT hydraulic pumps, ensuring precise oil port distribution and stable hydraulic balance in demanding construction operations.
View More
Uneven wear on a swash plate leads to hydraulic instability and devastating pump failure. For wholesalers and mine operators, downtime means bleeding profit. Our K5V140DT assembly eliminates jerky movements and pressure drops, securing your heavy machinery’s core reliability.
View More
Hydraulic performance drop in large excavators is often linked to internal piston instability caused by worn retaining components. RITO K5V140DT Set Plate is designed for axial piston pump systems, helping restore stable internal pressure control and consistent hydraulic output in heavy-duty working cycles.
View MoreHydraulic pressure instability in medium-to-large excavators often originates from internal piston support failure, causing reduced digging force and uneven pump output. RITO K3V112DT Set Plate Holder is engineered for axial piston pump systems, delivering stable internal structural support and restoring reliable hydraulic performance under continuous working loads.
View More
Heavy mining and construction sites often face main pump plunger wear, hydraulic pressure drop, slow movement and frequent part replacement, raising operation downtime and maintenance expenses. K5V140DT Piston Shoe fits DX300LC, S300LC-V, R290LC-7, R300LC-7 excavators perfectly, meeting bulk procurement demands for wholesalers, agents and mine end clients.
View More
Excessive friction between piston shoes and swash plates drops pump pressure, causing slow excavator response and heavy fuel losses. Weak slippers crush or split under violent hydraulic spikes. For fleet operations using SK200-6 or DH220 machines, one damaged shoe triggers widespread metal grinding, ruining expensive main pump rotating groups.
View MoreLeave A Message
Scan to wechat :
