Front-pump pressure unstable or declining on your R370-7 or R420LC-7? A worn 720785 front cylinder block allows the K3V180DT front section to bypass internally, robbing the boom and combined-load circuits of the high flow they need for productive large-excavator operation. RITO supplies this Tong Myung precision front barrel to restore full K3V180DT front-section displacement.
Item NO.:
720785Order(MOQ):
1pcsPayment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANShipping Port:
Huangpu,GuangzhouLead Time：
In Stock720785 Pump Cylinder Block (Front) for Kawasaki K3V180DT piston pumps on Hyundai R370-7, R375-7, R420LC-7 and R455LC-7 excavators. The K3V180DT is a high-displacement tandem pump for 35-45 tonne excavators. The front barrel is the drive-side section governing the primary high-pressure circuit. Cross-reference: 720786-PH (rear barrel). Precision-bored cylinders and lapped valve face restore the volumetric efficiency that large-machine LS systems depend on for responsive simultaneous function control.
| Part Number | 720785 |
|---|---|
| Part Name | Pump Cylinder Block (Front / Drive Side) |
| Compatible Brand | TONG MYUNG (Kawasaki K3V180DT Pump) |
| Applicable Models | R370-7, R375-7, R420LC-7, R455LC-7 Excavator |
| Application | Front (drive-side) rotating group of K3V180DT high-displacement tandem piston pump |
| Material | High-strength alloy steel |
| Product Color | Silver machined metal finish |
| Working Temperature | -25°C~+60°C |
| Key Function | Generates front-section high-pressure flow for R370-7 to R455LC-7 primary hydraulic circuits |
| Condition | 100% New Aftermarket OEM Quality |
| Packaging | Wooden Case Reinforced Carton Neutral Packing Customized Box |
Barrel wall thickness and bore geometry scaled for K3V180DT displacement rating, maintaining structural integrity at the higher piston loads generated by a large-excavator high-pressure pump.
Front barrel governs the primary high-pressure circuit on R370-7 to R455LC-7. Restoring front barrel efficiency maximises boom force and simultaneous-function flow available to the LS system.
Valve-plate mating surface lapped to Ra 0.2 to maintain the sealing clearance required for correct volumetric efficiency at K3V180DT rated pressure and displacement.
720785 front barrel can be replaced independently or together with 720786-PH rear barrel for full rotating group restoration in one service event.
FAQ
Q: How to distinguish K3V180DT front barrel (720785) failure from rear barrel failure?
A: Perform a split-flow pressure test. Low front-section outlet pressure with normal rear-section pressure, combined with high front case-drain flow, confirms the 720785 front barrel or its valve plate is worn.
Q: Should I replace the valve plate together with the 720785 front barrel?
A: Yes if the valve plate shows scoring, heat marks or surface steps on the sealing face. A new barrel against a worn valve plate will be re-scored within operating hours.
Q: What is the difference between 720785 (front) and 720786-PH (rear) barrel?
A: 720785 is the drive-side (front) barrel; 720786-PH is the driven-side (rear) barrel of the K3V180DT tandem pump. They differ in spline engagement and are not interchangeable. Confirm pump section before ordering.
Q: How to confirm 720785 fits my R370-7 K3V180DT pump?
A: Verify pump model is K3V180DT and existing front barrel part number is 720785. Confirm machine model is R370-7, R375-7, R420LC-7 or R455LC-7. Provide pump serial number 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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