Rear circuit losing pressure while front pump reads normal on your K3V112DP machine? The 716777 rear cylinder block wears independently and is often overlooked. RITO supplies this precision rear barrel with tight bore clearance to recover rear-pump output and balance dual-pump flow.
Item NO.:
716777Order(MOQ):
1pcsPayment:
T/T, WESTERN UNION, CHINESE BANK, PAYPALProduct Origin:
JAPANShipping Port:
Huangpu,GuangzhouLead Time：
In Stock716777 Cylinder Block Rear - driven-side barrel of the K3V112DP / K3V112BDP tandem pump. Precision-ground valve-face surface seals tightly against the valve plate, eliminating bypass leakage. Often replaced with valve plate 720774 or K9006409 to fully restore rear-pump output.
| Part Number | 716777 |
|---|---|
| Part Name | Excavator Hydraulic Cylinder Block (Rear) |
| Compatible Brand | TONG MYUNG (Kawasaki K3V112DP / K3V112BDP Pump) |
| Applicable Models | PC300-7, PC360-7, PC400-7 Excavator |
| Application | Rear section of dual tandem piston pump rotating group |
| Material | High-strength alloy steel |
| Product Color | Silver machined metal finish |
| Working Temperature | -25°C~+60°C |
| Key Function | Generates rear-pump hydraulic output in the K3V112DP tandem pump |
| Condition | 100% New Aftermarket OEM Quality |
| Packaging | Wooden Case Reinforced Carton Neutral Packing Customized Box |
Ground flat within tight tolerances to seal against the valve plate, preventing rear-pump internal bypass that robs circuit pressure.
Restores rear-section displacement to OEM spec so front and rear pump flows stay balanced, eliminating erratic boom or swing response.
Nine precision-bored cylinders maintain uniform piston-to-bore clearance across the full stroke, reducing heat buildup and wear rate.
Dimensionally matched to K3V112DP and K3V112BDP tandem housings for a drop-in swap alongside 720774 or K9006409 valve plates.
FAQ
Q: How do I know whether the 716777 rear cylinder block has failed?
A: Watch for these rear-pump specific signs: rear-circuit pressure reading lower than front-circuit on a gauge test, boom or arm speed slower than swing (rear-priority circuits weakening), oil foaming at the rear-pump case drain, and abnormal heat from the rear pump body after 30 minutes of operation.
Q: Can I replace only the 716777 without changing the valve plate?
A: If the valve plate mating surface shows scoring or heat discoloration, replace valve plate 720774 or K9006409 together with the 716777 barrel. Installing a new barrel against a worn valve plate will re-score the new part within hours. Flush the hydraulic circuit and check case-drain flow before refitting.
Q: What is the difference between the 716777 rear block and the 716776 front block?
A: The 716777 is the driven-side (rear) barrel of the K3V112DP tandem pump and handles the rear hydraulic circuit. The 716776 is the drive-side (front) barrel. They are not interchangeable - verify the position before ordering.
Q: How to confirm 716777 fits my excavator pump?
A: Check that your pump model is K3V112DP or K3V112BDP and that the existing rear barrel part number matches 716777, 720774 series, K9006409 or K9006410. Cross-reference with our technical team using your pump serial number if unsure.
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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