PC78UU-6 hydraulic pressure weak or pump whining under load? A worn 708-3T-11210 (K3V63) pump loses the volumetric efficiency that compact Komatsu machines rely on for responsive simultaneous boom and arm operation. RITO supplies this precision piston pump assembly rebuilt to K3V63 OEM specification to restore full PC78UU-6 hydraulic system response.
Item NO.:
708-3T-11210Order(MOQ):
1pcsPayment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANShipping Port:
Huangpu,GuangzhouLead Time：
In Stock708-3T-11210 Hydraulic Piston Pump Assembly for Komatsu PC78UU-6, PC78-6, PC88MR-6 and PC78US-6 excavators (K3V63 series). Cross-reference: 708-3T-00243. This compact variable axial piston pump must generate high continuous pressure relative to its size. Precision cylinder block, closely-fitted pistons and a calibrated regulator are all critical to maintaining the efficiency required for the PC78UU-6 duty cycle.
| Part Number | 708-3T-11210 / 708-3T-00243 |
|---|---|
| Part Name | Hydraulic Piston Pump Assembly |
| Compatible Brand | Komatsu |
| Applicable Models | PC78UU-6, PC78-6, PC88MR-6, PC78MR-6, PC78US-6 Excavator |
| Application | K3V63 main variable axial piston pump for PC78UU-6 and PC78-6 series hydraulic system |
| Material | Precision alloy steel rotating group, compact high-pressure housing |
| Product Color | Industrial finish |
| Working Temperature | -25°C~+60°C |
| Key Function | Generates main hydraulic system flow and pressure for PC78UU-6 / PC78-6 series all-function operation |
| Condition | 100% New Aftermarket OEM Quality |
| Packaging | Wooden Case Reinforced Carton Neutral Packing Customized Box |
Rotating group and housing designed for the high pressure-to-displacement ratio required in compact excavators where the pump must generate full system pressure at minimal engine speed.
Part number covers both 708-3T-11210 and 708-3T-00243 references across PC78UU-6 production batches, eliminating ordering uncertainty from part number discrepancies.
Single pump assembly covers PC78UU-6, PC78-6, PC88MR-6, PC78MR-6 and PC78US-6 - five compact Komatsu models in one SKU.
Pressure-flow regulator calibrated to PC78UU-6 S4D95LE-3A engine power specification, preventing the over-delivery that stalls compact engines during heavy simultaneous operation.
FAQ
Q: How do I tell if the 708-3T-11210 pump on my PC78UU-6 needs replacing?
A: Engine speed drops under normal load, all actuators are slow at the same engine speed, pump case-drain flow test shows above-spec leakage at rated speed, and the pump makes a high-pitched sound at maximum pressure.
Q: What is the difference between 708-3T-11210 and 708-3T-00243?
A: Both part numbers refer to the K3V63 series main pump for PC78-6 family machines; the difference is a Komatsu internal revision. RITO 708-3T-11210 is dimensionally compatible with both references.
Q: What is the minimum engine warm-up procedure before applying full load to a new 708-3T-11210?
A: Idle the engine for 5 minutes to circulate hydraulic oil and pre-warm the pump. Then operate all functions at half-load for 15 minutes before applying full working load. Check for leaks around all port connections after the first hour.
Q: How to confirm 708-3T-11210 fits my PC78UU-6?
A: Verify existing pump part number is 708-3T-11210 or 708-3T-00243 and machine is from the PC78-6 family. Provide machine 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
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