Internal pressure leakage within worn cylinder blocks causes heavy excavators to lose boom speed and digging power. The RITO 340811 Cylinder Block and Valve Plate kit restores tight tolerances inside your hydraulic pump. Replacing these parts eliminates internal oil bypassing, bringing full speed and power back to your heavy-duty machines.
Item NO.:
340811Order(MOQ):
1Payment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANLead Time：
2-3 DAYSRebuilding a large K5V200 pump with mismatched internal components can lead to friction damage and sudden pump failure. This RITO Rear Rotor Group is engineered specifically for ZX400 and ZX470 models. It provides a perfectly matched block and plate set for a reliable pump rebuild.
| Part Number | 340811 |
|---|---|
| Part Name | Hydraulic Pump Rotor Group Cylinder Block Valve Plate Rear |
| Compatible Brand | Tongmyung |
| Applicable Models | Hitachi ZX400, ZX470 (Kawasaki K5V200 Pump) |
| Application | Excavator hydraulic system |
| Material | High‑strength Alloy Steel |
| Product Color | Matte Steel Grey |
| Working Temperature | -25°C to 120°C |
| Key Function | Reciprocating piston chamber and fluid distribution plate |
| Condition | 100% New, Aftermarket / OEM Quality |
| Packaging | Wooden Case/Reinforced Carton/Neutral Packing / Customized Box |
High-strength steel block with a fused bronze piston face delivers excellent wear resistance under high pressures.
Flat, micro-lapped sealing surface prevents pressure drops and internal bypassing.
Engineered specifically for high-capacity ZX400, ZX470, and K5V200 pump groups.
FAQ
Q: Why is it best to replace the cylinder block and valve plate together during a K5V200 pump rebuild?
A: The cylinder block face and valve plate form a critical high-pressure sealing surface. If you pair a new block with a worn plate, micro-gaps will remain, causing immediate internal leakage and rapid wear on the new parts.
Q: What clean-room practices should our workshop follow when installing this rear rotor group?
A: The workspace must be completely free of dust and lint. Before assembly, submerge all parts in clean hydraulic oil and verify that the face surfaces are completely free of lint or fingerprints to prevent scoring on startup.
Q: How does the bimetallic bronze layer on this cylinder block prevent piston seizure during long work shifts?
A: The copper-bronze alloy is molecularly bonded to the steel block to provide excellent self-lubricating properties. This minimizes friction heat between the pistons and bores, preventing galling even at operating temperatures up to 120°C.
Q: How can we confirm this rear cylinder block matches the exact rotation of our twin-pump setup?
A: Part number 340811 specifies the rear pump section configuration. Our customer service team can verify your pump's exact layout using your Hitachi model number to ensure you receive the correct rear components.
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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