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RITO Retainer Plate 311508 HD450VII A8V55 311508 Maintenance Spare Part Excavator Repair Kit Heavy Duty Component

Are severe internal pump chatter, heavy system pulsations, or rapid piston shoe failures threatening to sideline your excavator on high-priority contracts? When a warped or loose retainer plate allows high-speed piston slippers to lift off the swash plate face, violent metallic scratching quickly destroys internal pump tolerances and causes complete mechanical seizure. Overhaul your hydraulic core and secure optimal fluid balance by installing the high-rigidity RITO 311508 set plate.

  • Item NO.:

    311508
  • Order(MOQ):

    1
  • Payment:

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

    JAPAN
  • Lead Time:

    2-3 DAYS
  • Product Details

Mining procurement teams and heavy machinery repair depots cannot afford weak internal component tolerances that drop pressure after a major pump tear-down. The tough RITO 311508 shoe retainer plate holds the piston group in perfect alignment to optimize volumetric efficiency and reduce internal oil friction under full load. Buy this essential excavator repair kit component to protect your equipment investment from unexpected field undercarriage shutdowns.

311508 Retainer Plate

 
Product Specifications

Part Number  311508
Part Name Retainer Plate Maintenance Spare Part
Compatible Brand Tongmyung
Applicable Models HD450VII, EX100 Excavators utilizing A8V55 Series Pumps
Application Excavator hydraulic system
Material High-Hardness Alloy Steel
Product Color Polished Steel Silver and Bright Golden Bronze
Working Temperature -35°C to 125°C
Key Function Holding piston slipper shoes tight against the sliding surface of the swash plate
Condition 100% New, Aftermarket / OEM Quality
Packaging Wooden Case/Reinforced Carton/Neutral Packing / Customized Box

 

Key Features & Advantages


Precision

High-Rigidity Stamped Structural Steel

Fabricated from premium alloy steel to withstand continuous heavy-duty cyclic loading without structural stress cracking.

Leak-Free

Mirror-Polished Slipper Receptacles

Ultra-smooth internal opening perimeters minimize high-frequency slipper drag and scuffing wear.

Direct Fitment

True Planar Flatness Profile

Precision-ground surface eliminates internal spacing gaps to stop high-pressure oil bypass across the rotating group.

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 specific hydraulic failures indicate that an 311508 set plate has suffered severe internal wear or distortion?
A: A noticeable drop in oil flow rate under high loads, elevated pump casing temperatures, and unusual whining noises caused by tilted pistons leaking fluid internally.
 
Q: What quality control checks are necessary when setting up this slipper retainer plate within the rotating kit housing?
A: Workshop mechanics must check that each piston collar moves smoothly inside its matching socket pocket without sticking, and measure the gap height clearance before tightening.
 
Q: Does this 311508 part number work for both original factory housings and aftermarket rebuild sets?
A: This retainer is precision-machined to standard factory blueprints for this specific 55cc displacement pump housing layout, ensuring seamless interchangeability for workshop managers.
 
Q: How does the structural steel base of this retainer plate prevent failure during high-heat mining operations?
A: The alloy steel backing plate undergoes deep thermal conditioning to increase its resistance to pressure fatigue, keeping the plate flat and true even during continuous rock breaking shifts.
 

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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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.

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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.

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