Slow boom and arm response on your PC58UU-3-N despite normal engine RPM? The 708-3S-00411 HPV55 pump is leaking internally, bleeding flow that should reach the actuators. RITO supplies this rebuilt main pump with OEM-clearance bores to restore instant response on your PC58UU-3-N.
Item NO.:
708-3S-00411Order(MOQ):
1pcsPayment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANShipping Port:
Huangpu,GuangzhouLead Time：
In Stock708-3S-00411 Excavator Main Pump for PC58UU-3-N (Komatsu HPV55 series). Precision-machined barrel bores and lapped valve face restore volumetric efficiency.
| Part Number | 708-3S-00411 |
|---|---|
| Part Name | Excavator Hydraulic Main Pump (Piston Pump) |
| Compatible Brand | Komatsu (HPV55 Piston Pump) |
| Applicable Models | PC58UU-3-N Excavator |
| Application | Main hydraulic pump for PC58UU-3-N 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 PC58UU-3-N work circuits |
| Condition | 100% New Aftermarket OEM Quality |
| Packaging | Wooden Case Reinforced Carton Neutral Packing Customized Box |
The 708-3S-00411 cylinder block, pistons and piston shoes are machined to HPV55 OEM clearance, restoring volumetric efficiency and cutting the internal bypass that drives oil temperature up on the PC58UU-3-N.
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 PC58UU-3-N HPV55 circuit.
The HPV55 regulator is pre-set to the PC58UU-3-N engine power curve, preventing engine overload during combined boom, swing and travel demand without field adjustment.
708-3S-00411 port configuration, flange bolt circle and spline engagement are confirmed for the PC58UU-3-N, providing direct bolt-on installation without adaptor blocks or hose rerouting.
FAQ
Q: What symptoms indicate the 708-3S-00411 pump needs replacing on a PC58UU-3-N?
A: Main circuit pressure falls below specification on a gauge test, all functions slow simultaneously at rated engine speed, HPV55 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 708-3S-00411 pump?
A: This 708-3S-00411 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 708-3S-00411 pump fit other Komatsu models besides the PC58UU-3-N?
A: Cross-reference numbers 708-3S-00411 apply. The 708-3S-00411 pump is dimensionally matched to the HPV55 pump application; confirm your machine serial number with our team if you are unsure of compatibility.
Q: How to confirm the 708-3S-00411 is the correct pump for my PC58UU-3-N?
A: Match the pump model plate reading 708-3S-00411 and confirm the machine model is PC58UU-3-N. 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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