Products

RITO Swing Motor E312C E312D E312CL E312DL 321C 312D E313D E312D2 Excavator MFC80 170-9893 1709893 Rotary Device Spare Parts

Noticeable upper structure swing drift on slopes and slow positioning alignment when placing trench pipes indicate dangerous internal bypass leakage inside the rotary device block. As the internal piston slippers score the high-pressure valve face after years of service, braking fluid pressure bleeds directly back into the case return line, causing loose house controls and critical structural hazards. Stop running a worn out slewing core that risks site safety.

  • Item NO.:

    CAT312D Swing Motor
  • Order(MOQ):

    1
  • Payment:

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

    JAPAN
  • Lead Time:

    2-3 DAYS
  • Product Details

Re-establish absolute house braking control and zero-drift swing positioning with the rugged RITO Swing Motor E312C. Built as an elite Rotary Device Spare Parts core matching the high-spec MFC80 design, this high-torque assembly delivers clean deceleration vectors and relentless rotational torque to restore full material handling accuracy across E312D, E312CL, E312DL, 321C, 312D, E313D, and E312D2 machinery groups.

CAT312D Swing Motor

 
Product Specifications

Part Number  170-9893 / 1709893 / MFC80 Configuration
Part Name Hydraulic Slewing Motor Rotary Device Assembly
Compatible Brand CAT
Applicable Models Caterpillar E312C, E312D, E312CL, E312DL, 321C, 312D, E313D, E312D2
Application Excavator hydraulic system
Material High-Strength Forged Alloy Steel
Product Color Industrial Yellow
Working Temperature -25°C to 120°C
Key Function High-Torque Upper Structure Rotation and Dynamic Multi-Disc Hydraulic Braking
Condition 100% New, Aftermarket / OEM Quality
Packaging Wooden Case/Reinforced Carton/Neutral Packing / Customized Box

 

Key Features & Advantages


Precision

High-Torque MFC80 Rotary Piston Assembly

utilizes micro-lapped bronze-faced slippers to lower scuffing resistance under heavy rotational inertia.

Leak-Free

Integrated Spring-Applied Brake Release Plate Matrix

locks the upper platform instantly when pilot joystick command signals drop to neutral.

Direct Fitment

Oversized Dual-Opposed Internal Driving Bearings

handle heavy axial side forces easily, preventing output shaft runout or gear binding.

Rigorous Testing

Global Supply Tiering

We offer Original, OEM, and high-performance Aftermarket options to provide flexible procurement strategies for diverse regional markets.

 

Excavator Hydraulic Part

FAQ


Q: What mechanical warning signs confirm that an MFC80 series swing motor has sustained internal relief valve sealing bypass?
A: The excavator house drifts significantly after releasing the control handles, accompanied by a hollow buzzing noise inside the rotating platform area.
 
Q: What configuration checks must field mechanics run on the case drain line when dropping in this replacement swing motor?
A: Mechanics must verify the case drain route returns directly to the storage reservoir without high backpressure, which prevents blowing out the input shaft seal.
 
Q: How do global procurement groups confirm that this specific rotary motor device fits their mixed rental fleet stocks?
A: Cross-reference your field parts tag with part number 170-9893. This layout matches factory dimensions for standard 12-to-14 ton mid-size rotating links.
 
Q: How does this hydraulic slewing motor handle sudden reverse braking pressure when working on steep hillside grading cuts?
A: The unit features pre-set anti-shock crossover valves that smooth out sudden counter-pressure spikes, maintaining smooth operation without metal scuffing.
 
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

320CLZBYG Stick cylinder
RITO Excavator Stick Cylinder 320CLZBYG ZX120 ZX200 ZX210 EX200-1 Hydraulic Boom Cylinder Arm Cylinder for Construction Machinery

RITO Excavator Stick Cylinder is built for ZX120, ZX200, ZX210, EX200-1, and 320CLZBYG. For distributors and agents: high interchangeability reduces inventory complexity. Mining customers benefit from reinforced sealing and shock resistance, lowering downtime and maintenance costs.    

View More
527-0741 527-0742 Hydraulic Main Pump
RITO Hydraulic Pump Coupling Hub 527-0741 527-0742 for Caterpillar CAT 336GC 336D 15 Teeth Flange Coupling Group

This RITO 527-0741 527-0742 Hydraulic Pump Coupling Hub is a key transmission component for Caterpillar CAT 336GC and 336D excavators, designed to connect the engine and hydraulic pump with stable torque transfer. Featuring a 15-tooth flange structure, it ensures precise alignment, smooth power delivery, and reliable operation in demanding construction environments.

View More
124-1607 Hydraulic Oil Cooler
RITO Hydraulic Oil Cooler 124-1607-OT CAT 320C 320D 325D 330D Excavator Oil Cooler Core Radiator Assembly for Caterpillar

This RITO 124-1607-OT Hydraulic Oil Cooler is a key cooling component for Caterpillar CAT 320C, 320D, 325D, and 330D excavators, designed to effectively dissipate heat from hydraulic oil and maintain optimal system temperature. It ensures stable oil viscosity, protects internal components, and supports reliable operation in demanding construction environments.

View More
234-4440
RITO Excavator Swivel Joint 234-4440 CAT 336D 325D 330D Travel Motor Lines Hydraulic Rotary Union for Caterpillar

This RITO 234-4440 Swivel Joint (Rotary Union) is a critical hydraulic component for Caterpillar CAT 336D, 325D, and 330D excavators, designed to transfer hydraulic oil between the upper structure and undercarriage during continuous rotation. It ensures stable oil flow to travel motors, maintaining smooth operation and reliable performance in construction environments.

View More
585-9230 Solenoid Valve
RITO Original Solenoid Valve 585-9230 Excavator Hydraulic Solenoid Valve Proportional Valve for CAT

Hydraulic lag and erratic pressure in CAT excavators often signal a failing proportional valve, causing costly site delays. The 585-9230 eliminates these inefficiencies. Precision-engineered for mining and heavy construction, it prevents system overheating and jerky boom movements.

View More
585-9230 Solenoid Valve
RITO Original Solenoid Valve 585-9230 Excavator Hydraulic Solenoid Valve Proportional Valve for CAT

Hydraulic lag and erratic pressure in CAT excavators often signal a failing proportional valve, causing costly site delays. The 585-9230 eliminates these inefficiencies. Precision-engineered for mining and heavy construction, it prevents system overheating and jerky boom movements.

View More
179-6916 Spring
RITO Excavator spring Coil Spring 179-6916 spring for CAT

The RITO Excavator Coil Spring 179-6916-Y is designed for heavy-duty applications in CAT excavators, offering reliable and long-lasting performance in demanding work environments. This high-quality spring ensures consistent and efficient load-bearing capability, reducing wear and tear on critical excavator components. The 179-6916-Y is essential for maintaining optimal machine performance in industries such as construction and mining. By minimizing downtime and maintenance costs, this coil spring enhances productivity and contributes to the long-term durability of your fleet. Designed for seamless compatibility with various CAT excavator models, it provides an ideal replacement solution for wholesale distributors and agents.

View More
291-0061 Fan Piston Pump
RITO Hydraulic Axial Piston Pump 291-0061 Hydraulic Fan Piston Pump for Excavator Main Pump Assembly

Unstable fan speeds and hydraulic overheating often stem from inefficient pump pressure. In grueling mining sites, a failing fan pump leads to engine derating and massive downtime. The 291-0061 solves these thermal inconsistencies, preventing the costly "cascading failures" that plague heavy excavator fleets.

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