Products

RITO 321705 Piston Pump Ball Guide PC300-7 PC350-7 PC360-7 HPV140 321705 Main Pump Guide Ball Excavator Pump Repair Parts

Suffering from uneven barrel wear, sluggish variable displacement changes, or high friction drag inside your excavator's primary pump block? A pitted center guide ball shifts out of true alignment, causing the shoe retainer plate to tilt and destroying adjacent internal components. Re-establish seamless centering control and true balanced rotation by upgrading to the RITO 321705 main pump ball guide.

  • Item NO.:

    321705
  • Order(MOQ):

    1
  • Payment:

    T/T, WESTERN UNION, CHINESE BANK,PAYPAL
  • Product Origin:

    JAPAN
  • Lead Time:

    2-3 DAYS
  • Product Details

Heavy equipment parts vendors require dependable centering hardware to satisfy demanding quarry operators. The tough RITO 321705 centers the rotating group precisely to deliver smooth, vibration-free volumetric output under extreme structural stress. Keep your fleet active and lowering field maintenance expenses with our high-grade core component.

321705 Ball Guide

 
Product Specifications

Part Number  321705
Part Name Main Pump Guide Ball Spherical Guide Excavator Pump Repair Parts
Compatible Brand Tongmyung
Applicable Models PC300-7, PC350-7, PC360-7 Excavators
Application Excavator hydraulic system
Material High‑strength Alloy Steel
Product Color Polished Steel Metallic Silver
Working Temperature -30°C to 115°C
Key Function Aligning the cylinder barrel and retainer plate to maintain steady internal rotation
Condition 100% New, Aftermarket / OEM Quality
Packaging Wooden Case/Reinforced Carton/Neutral Packing / Customized Box

 

Key Features & Advantages


Precision

Micro-Polished Spherical Surface

Smooth outer finish lowers frictional heat to provide quiet variable tilt response.

Leak-Free

Carburized Alloy Bearing Steel

Hardened outer layer protects against surface deformation and pitting under heavy loading cycles.

Direct Fitment

Direct HPV140 Component Match

Manufactured strictly to universal standard metrics to provide straightforward internal pump reassembly.

Rigorous Testing

 Multi-Tier Quality Options

We provide Original, OEM, and Premium Aftermarket grades, allowing distributors to meet diverse client budgets and performance needs.

 

Excavator Hydraulic Part

FAQ


Q: What operational symptoms suggest that the central ball guide has worn past its safe service limits?
A: Heavy mechanical chattering vibrating through the pump casing, a distinct drop in volume flow rate under full load, and fine metallic dust gathering in the hydraulic return filters.
 
Q: What alignment clearances must workshop crews check when setting up this replacement guide ball?
A: Technicians must measure the overall thickness of the underlying spacer washers against factory specs, ensuring the guide slides over the drive shaft smoothly without lateral loose play.
 
Q: Can regional parts managers stock this 321705 part across multiple 30-ton class tracked excavator models?
A: Yes, it serves as a universal center guide for the listed series utilizing the HPV140 pump layout, allowing parts distributors to minimize warehouse inventory space.
 
Q: How does this spherical center guide avoid metal distortion during long multi-shift summer quarry operations?
A: The alloy steel body goes through advanced deep-furnace tempering, which maintains excellent metal flexibility beneath the hardened surface to absorb continuous pressure spikes safely.
 
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

Leave A Message
If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.

Related Products

141634 Cylinder Block
RITO Hydraulic Pump Cylinder Block 141634 EX200-1 EX220-1 HPV116 HMG32 Main Pump Rotating Group Barrel for Excavator

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
720773 Cylinder Block
RITO Hydraulic Pump Cylinder Block Front 720773 K3V112DT K3V63 K3V140 Excavator Main Pump Rotating Group Assembly for Excavator

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
720773 Cylinder Block Front
RITO Hydraulic Pump Cylinder Block Front 720773 Valve Plate K3V112 K3V112DT Excavator for Construction Machinery

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
704543A Piston Shoe
RITO Hydraulic Pump Piston Shoe 704543A K3V112DT K3V63 K5V140 Excavator Main Pump Slipper for Construction Machinery

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
641202 Valve Plate
RITO Hydraulic Pump Valve Plate 641202 for Komatsu PC200-7 PC200-8 MB85 Excavator Main Pump

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
648012 Friction Plate-Bronze
RITO Bronze Friction Plate 648012 friction Plate-Bronze for Komatsu PC160-7 JCB JS160 Takeuchi TB135 MSF85P

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
648013 Separation Plate-Steel
RITO Steel Separation Plate 648013 separation plate-steel for Komatsu PC160-7 JCB JS160 Takeuchi TB135 MSF85P

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
204-2683 Hydraulic Pump Actuator
RITO Hydraulic Pump Actuator 204-2683-DM Hydraulic Pump Lifter for Caterpillar CAT E320C SBS120 SBS140

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 More
Leave A Message
If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.

Leave A Message

Leave A Message
If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.

Home

Products

whatsApp

contact