System pressure unstable or dropping on your PC300-7 or PC450? A worn 642401 cylinder block allows pistons to bypass, bleeding pressure before it reaches the work circuits. RITO machines this barrel to tight clearance specs so your pump builds and holds rated pressure from the first hour.
Item NO.:
642401Order(MOQ):
1pcsPayment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANShipping Port:
Huangpu,GuangzhouLead Time：
In Stock642401 Cylinder Block - core rotating-group component for Kawasaki HPV140 / K3V112 series piston pumps fitted to PC300-7, PC360-7, PC400-7 and PC450 excavators. Mirror-lapped valve-face surface and precision barrel bores ensure low internal leakage and high volumetric efficiency across a wide operating temperature range.
| Part Number | 642401 |
|---|---|
| Part Name | Excavator Hydraulic Pump Cylinder Block |
| Compatible Brand | TONG MYUNG (Kawasaki HPV140 / K3V112 Pump) |
| Applicable Models | PC300-7, PC360-7, PC400-7, PC450 Excavator |
| Application | Main piston pump rotating group - pressure generation core |
| 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 system pressure |
| Condition | 100% New Aftermarket OEM Quality |
| Packaging | Wooden Case Reinforced Carton Neutral Packing Customized Box |
Valve-plate mating surface lapped to Ra 0.2 or better, cutting leakage at the most critical sealing interface in the pump.
Tight bore-to-piston clearance maintains rated displacement across the full pressure range, reducing fuel consumption and cycle time.
One part number covers PC300-7, PC360-7, PC400-7 and PC450, simplifying workshop stock and reducing dead inventory.
Machined to match 642401 OEM drawings for drop-in fit inside the existing pump casing without line-boring or shimming.
FAQ
Q: What symptoms point to a failing 642401 cylinder block?
A: Main relief pressure falls below spec on a gauge test, dig force weakens progressively, pump case-drain flow exceeds OEM limit (usually above 10 L/min at rated speed), and the pump runs hotter than normal.
Q: Should I replace the valve plate when fitting a new 642401?
A: Yes, if the valve plate shows scoring, heat marks or uneven wear on the sealing face. Fitting a new barrel against a damaged valve plate will score the new part within the first operating hours.
Q: Does 642401 fit both single and dual pump configurations?
A: The 642401 barrel fits the front section of the HPV140 / K3V112 tandem pump. Confirm pump serial number and pump position (front/rear) before ordering, as front and rear barrels differ in internal geometry.
Q: How to confirm 642401 is compatible with my PC300-7?
A: Verify the pump model tag reads HPV140 or K3V112 and the existing barrel part number is 642401. Contact us with the pump serial number if uncertain.
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
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