Rear pump pressure low or rear-circuit actuators sluggish on your PC300-7 or PC350-7? A worn 321701 rear barrel and valve plate is the root cause of HPV140 rear-section efficiency loss. RITO matches this barrel-and-plate pair to OEM lapping standards so rear-pump output recovers from day one.
Item NO.:
321701Order(MOQ):
1pcsPayment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANShipping Port:
Huangpu,GuangzhouLead Time：
In Stock321701 Cylinder Block with Valve Plate (Rear / Left) for Kawasaki HPV140 piston pumps on PC300-7, PC350-7, PC300-8 and PC360-7 excavators. The rear section barrel and valve plate are surface-matched as a pair to achieve consistent sealing performance. Ensures correct rear-circuit flow for boom, arm and swing function balance.
| Part Number | 321701 |
|---|---|
| Part Name | Cylinder Block with Valve Plate (Rear) |
| Compatible Brand | TONG MYUNG (Kawasaki HPV140 Pump) |
| Applicable Models | PC300-7, PC350-7, PC300-8, PC360-7 Excavator |
| Application | Rear section rotating group of HPV140 tandem piston pump |
| Material | Alloy steel barrel, phosphor-bronze composite valve plate |
| Product Color | Silver barrel / gold valve plate |
| Working Temperature | -25°C~+60°C |
| Key Function | Maintains rear-circuit flow balance alongside the front-section barrel |
| Condition | 100% New Aftermarket OEM Quality |
| Packaging | Wooden Case Reinforced Carton Neutral Packing Customized Box |
Port timing and barrel bore geometry matched to the HPV140 rear section, preventing cross-port leakage between front and rear pump circuits.
Barrel valve face and valve plate lapped together to Ra 0.1 finish, eliminating the break-in leakage that reduces early pump efficiency with mismatched parts.
One part number covers PC300-7, PC350-7, PC300-8 and PC360-7, simplifying procurement for multi-model fleets.
Correct rear-barrel displacement restores the flow balance between front and rear pump sections, normalising dig force and swing response simultaneously.
FAQ
Q: How do I confirm the 321701 rear barrel is the cause of my HPV140 problem?
A: Perform a case-drain flow test on the rear pump section. If rear case-drain flow exceeds OEM specification (typically 8-12 L/min at rated speed and pressure) while the front section is within spec, the 321701 barrel or valve plate is worn.
Q: Is 321701 interchangeable with 321702?
A: No. 321701 is the rear (left) barrel and 321702 is the front (right) barrel. They differ in spline engagement and port orientation. Always confirm pump position before ordering.
Q: Should I replace the full rotating group or just the 321701 barrel and valve plate?
A: Replace pistons and piston shoes too if their slipper faces show wear or the shoes are loose on the pistons, as worn pistons re-score a new barrel rapidly. Replace barrel and valve plate together as a minimum.
Q: How to confirm 321701 fits my PC300-7 HPV140 pump?
A: Verify the pump model tag reads HPV140 and the existing rear barrel part number is 321701. Contact us with the 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
RITO Hydraulic Pump Cylinder Block 141634 is designed for EX200-1, EX220-1, HPV116, and HMG32 main pumps. For distributors and agents: standardized dimensions ensure drop-in replacement, reducing return rates. Mining customers benefit from high-wear resistance, minimizing unplanned pump failures.
View More
This RITO 720773 Cylinder Block Front is a critical core component for K3V112DT, K3V63, and K3V140 excavator hydraulic pumps, forming part of the rotating group assembly. It works with pistons and valve plates to ensure stable pressure generation, precise flow output, and efficient hydraulic performance in construction environments.
View More
Hydraulic efficiency loss in excavators leads to sluggish cycles and high fuel costs. Worn cylinder blocks and valve plates cause internal leakage, paralyzing your fleet. The 720773 and K3V112DT series resolve these critical failures, restoring system pressure for heavy-duty construction demands.
View More
Worn piston shoes cause catastrophic internal friction and pressure loss in main pumps, leading to expensive machine downtime. The 704543A slipper addresses these vulnerabilities. Engineered for high-load mining, it prevents "slipper tilt" and scoring that often plagues inferior low-cost parts.
View More
The RITO Hydraulic Pump Valve Plate 641202 is designed for high-efficiency and durable performance in demanding excavator applications such as the Komatsu PC200-7, PC200-8, and MB85. Whether for wholesale or direct mining applications, this valve plate improves hydraulic flow and pump reliability. Unlike traditional valve plates, it ensures a longer operational lifespan, reducing maintenance costs and downtime. This makes it a critical component for heavy-duty machinery in challenging environments. The 641202 enhances performance by providing superior seal integrity and operational stability, crucial for minimizing operational disruptions.
View More
Facing frequent downtime & high replacement costs on excavator friction parts? RITO Bronze Friction Plate 648012 solves core pain: unstable friction, rapid wear & poor heat resistance. Ideal for wholesalers, agents & mine clients; fits Komatsu PC160-7, JCB JS160, Takeuchi TB135, MSF85P. Delivers consistent torque, lower maintenance & longer service life.
View More
Generic separators fail in heavy mining/construction, causing premature wear, hydraulic system damage, and costly delays. Solution：RITO Steel Separation Plate 648013 delivers OEM-grade durability, perfect fit for Komatsu PC160-7, JCB JS160, Takeuchi TB135, MSF85P, and reliable aftermarket support to cut costs and maximize uptime.
View More
Mine/wholesalers/agents face unplanned downtime, poor part compatibility, and high maintenance costs on CAT E320C/SBS120/SBS140. Generic actuators leak, fail fast, and delay projects, eroding profits. RITO 204-2683-DM is OEM-grade, direct-fit, and built for harsh mining/construction. It cuts downtime, lowers costs, and boosts resale value.
View MoreLeave A Message
Scan to wechat :
