Main pump case drain overheating or pressure hunting on your PC128US-2-EU? The 708-1L-00511 HPV95 barrel and valve plate wear together, letting hot oil slip past the sealing faces. RITO replaces the complete rotating group so your PC128US-2-EU runs cool and holds rated pressure under full load.
Item NO.:
708-1L-00511Order(MOQ):
1pcsPayment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANShipping Port:
Huangpu,GuangzhouLead Time：
In Stock708-1L-00511 Hydraulic Main Pump for Komatsu PC128US-2-EU with HPV95 variable displacement piston pump. New rotating group and matched valve plate eliminate the bypass that drives up oil temperature.
| Part Number | 708-1L-00511 / 708-1L-00530 |
|---|---|
| Part Name | Excavator Hydraulic Main Pump (Piston Pump) |
| Compatible Brand | Komatsu (HPV95 Piston Pump) |
| Applicable Models | PC128US-2-EU Excavator |
| Application | Main hydraulic pump for PC128US-2-EU 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 PC128US-2-EU work circuits |
| Condition | 100% New Aftermarket OEM Quality |
| Packaging | Wooden Case Reinforced Carton Neutral Packing Customized Box |
The 708-1L-00511 cylinder block, pistons and piston shoes are machined to HPV95 OEM clearance, restoring volumetric efficiency and cutting the internal bypass that drives oil temperature up on the PC128US-2-EU.
Barrel face and valve plate are surface-matched to Ra 0.2 during assembly, eliminating the break-in leakage phase that reduces new-pump efficiency on the PC128US-2-EU HPV95 circuit.
The HPV95 regulator is pre-set to the PC128US-2-EU engine power curve, preventing engine overload during combined boom, swing and travel demand without field adjustment.
708-1L-00511 port configuration, flange bolt circle and spline engagement are confirmed for the PC128US-2-EU, providing direct bolt-on installation without adaptor blocks or hose rerouting.
FAQ
Q: What symptoms indicate the 708-1L-00511 pump needs replacing on a PC128US-2-EU?
A: Main circuit pressure falls below specification on a gauge test, all functions slow simultaneously at rated engine speed, HPV95 case-drain flow exceeds the OEM limit, oil temperature rises faster than normal, and metal particles appear in the hydraulic oil.
Q: Should I replace the valve plate when fitting the new 708-1L-00511 pump?
A: This 708-1L-00511 assembly includes a new matched valve plate and rotating group, so the sealing interface is correct from installation. No additional valve plate replacement is required.
Q: Does the 708-1L-00511 pump fit other Komatsu models besides the PC128US-2-EU?
A: Cross-reference numbers 708-1L-00511 / 708-1L-00530 apply. The 708-1L-00511 pump is dimensionally matched to the HPV95 pump application; confirm your machine serial number with our team if you are unsure of compatibility.
Q: How to confirm the 708-1L-00511 is the correct pump for my PC128US-2-EU?
A: Match the pump model plate reading 708-1L-00511 and confirm the machine model is PC128US-2-EU. Provide the pump and machine serial numbers to our team for exact cross-reference confirmation.
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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