SEM 665F

Key Specification
Advantage
Application

Rated Load: 6,500 (for Std. Linkage)kg
Operating Weight with Standard Bucket: 20,500kg
Bucket Capacity: 2.9-5.5m³

NEW Ttransmission - Smooth & Efficient
Improved Productivity
Powerful Performance

Featuring a long wheelbase design and optimized lifting force, the 665F is primed to excel in demanding environments such as ports, mines, steel plants, sand and gravel operations, earthwork projects, and other heavy-duty conditions.

Feature
Specification
Product Comparison
Video
Photo
Download Brochure

The 665F introduces a groundbreaking automatic electric-hydraulic control countershaft transmission, which delivers smooth shifting. Additionally, it features an optimized heavy-duty tailored axle, ensuring high reliability and enhanced comfort.

The newly optimized hydraulic system significantly improves the machine's lifting capacity. With a 3.4-meter wheelbase, the stability of the entire machine is improved, resulting in an increased load capacity of 8%.

The new F generation cab offers 20% more space, along with automatic temperature-controlled air conditioning and a micro-pressurization function to provide a clean and quiet working environment.

The LED lights effectively enhance visibility, while an enlarged fuel tank ensures extended operation. In addition, the secondary brake system greatly improves the safety of both the equipment and operator. With product link installed, it's much easier for machine maintenance and fleet management.

NEW Ttransmission - Smooth & Efficient

SEM TR220 EH control countershaft transmission features , F2/R1 gear settings, with the 1^st gear catering to most work needs, eliminating the need for frequent gear changes and ensuring easy operation.
The automatic shifting mode further reduces operator fatigue.
Caterpillar's extensive experience in countershaft transmission design and manufacturing ensures reliability.
Excellent matching between engine and transmission offers a greater range of transmission efficiency, resulting in improved efficiency and fuel economy.
Fine-tuned gear shifting and a self-protection mechanism guarantee exceptional longevity.

Improved Productivity

An extended wheelbase improves the tipping load, increasing the rated load to 6.5 tons and optimizing loading capability.
The performance series bucket can accommodate 10% more material.
The single load-sensing hydraulic system guarantees faster hydraulic cycle times of 9.8 s, allowing the machine to respond quickly.
With a large hitch frame and 50/50 split at the center of articulation, the machine is both flexible and stable.
Improved drawbar pull force ensures easy and full bucket loading.
The large-displacement coaxial flow steering unit provides better maneuverability and smooth steering.

Powerful Performance

Customized Weichai engine ensures optimal compatibility with the machine systems to deliver robust power.
An optimized hydraulic system increases pressure from 18 Mpa to 20 Mpa, effectively improving the boom lifting force.
Breakout force, drawbar force and boom lifting force ensure the machine can handle all kinds of challenging jobsites.
New optimized axle differential and casing bolts improve reliability, with the SO36 axle available for extremely heavy applications.
The modular design cooling system provides excellent cooling performance, with a high ambient cooling package also available.

Upgraded Transmission Smooth & Efficient

SEM TR220 EH control countershaft transmission offers simple and efficient operation.
Excellent matching between the engine and TR220 transmission results in a greater range of transmission efficiency for improved efficiency and fuel economy.
2-speed automatic transmission features F2/R1 gear settings, allowing the 1^st gear to handle most duties and eliminating the need for frequent gear changes.
The fully automatic shifting mode further reduces operator fatigue.
Improved drawbar pull force and bucket ensure easy insertion into stockpiles and full loading.
The large-displacement coaxial flow steering unit delivers better maneuverability and smooth steering.
With an electronically controlled automatic leveling function, the operator can freely define bucket lifting and tilting positions based on working conditions.
Proven countershaft transmission design and manufacturing experience ensure reliability.

Tapered bearing design effectively ensures gearbox service life.
The gearbox undergoes a variety of verification processes to ensure reliability.
Unique transmission protection function ensures reliability and safety.

More Productive

Extended wheelbase and optimized axle greatly increase machine load capacity.
The full steering tipping load is significantly increased, with the rated load increased to 6.5 tons to better meet the needs of heavy-load applications.
The 665F adopts a 3.4-meter-long wheelbase design, greatly improving stability and loading capacity.
The performance series bucket can load 10% more material and easily be inserted into material piles, effectively reducing fuel consumption.
The single-load sensing hydraulic system guarantees faster hydraulic motions, with hydraulic cycle time of 9.8 s. The machine responds quickly and loads more efficiently, providing additional traction force to the tires to enhance working efficiency when the hydraulic system is insufficient. In addition, the system supplies flow and pressure only when required, saving fuel consumption by 8%-12% and effectively reducing the load on the radiator system.
With a large hitch frame and 50/50 split at the center of articulation, the machine is flexible and stable.
The drive shaft uses a face-tooth structure, effectively improving reliability.

Supercharged Machine

Optimized hydraulic system and increased pressure from 18 Mpa to 20 Mpa, effectively improve boom lifting force.
Standard single-lever pilot control and optional dual-lever pilot control offer flexible configuration for comfortable operation.
New optimized axle differential and casing bolts improve reliability and load capacity, with the SO36 axle available for order for heavy-duty applications.
The modular design cooling system delivers excellent cooling performance and reduces maintenance costs, with an optional high ambient cooling package available. The cooling tail door can be opened from the back, making maintenance convenient.
Secondary braking serves as the parking brake, with continuously adjustable parking brake force to ensure operator and equipment safety in emergency situations.
The fuel tank's effective capacity is now increased to 303 liters, effectively improving the machine's endurance.
A variety of lift arms and work tools are provided to meet the needs of different customers and applications.

Comfortable Operating Environment

The integrally molded cab features ample space (20% wider than the D Series) and excellent visibility. The fresh air pressurization function keeps the cab cleaner, while automatic temperature control air conditioning and a multi-air-vent design achieve better defrosting performance and faster temperature adjustment.
Full interior trim and ergonomic design make operations easier, and features such as a multi-directional adjustable suspension seat, sun visor, arm and hand rests, 24 V charging port, and adjustable steering column ensure all controls are within reach.
The front instrument panel provides all necessary equipment information and includes a three-phase alarm function. An optional rear camera allows for better monitoring the machine's working status.
Caterpillar's technology shock-absorbing system effectively mitigates cab and engine vibrations, enhancing reliability and comfort.

Enhanced Reliability

Professionally tuned gearshift and self-protection feature guarantee a more durable transmission. The electrohydraulic control transmission, designed and manufactured by Caterpillar, provides greater reliability while lowering maintenance costs.
SEM customized 2,000 rpm Weichai engine achieves optimal compatibility with the machine system, delivering impressive power and lower fuel consumption.
The 3-stage air filter design ensures high filtration efficiency, with the first-stage filter element achieving up to 93% filtration to reduce early wear by 90%. The optional oil bath air filter provides lower maintenance cost under severe working conditions.
Caterpillar's C-link technology (Dynamic fatigue strength analysis and performance optimization), FEA (Finite element analysis), and OMSA (On machine stress-strain analysis) are applied to significantly guarantee the reliability and life of the machine chassis.
Proven design for hydraulic system and axle.

Model
Model	SEM 665F
Main Specifications
Rated Load	6,500 (for Std. Linkage) kg
Operating Weight with Standard Bucket	20,500kg
Bucket Capacity	2.9-5.5m³
Wheel Base	3,400mm
Overall Dimension	8,7043,0923,458mm
Max. Drawbar Force	220kN
Breakout Force	188kN
Dump Clearance	3,050mm
B-Pin Height	4,196 (for Std. Linkage) mm
Transmission
Transmission Type	EH countershaft. power shift
Transmission Gears	F2/R1
Maker & Type	SEM TR220
Forward l	11.6km/h
Forward ll	38.5km/h
Reverse l	15.5km/h
Axle (Axle, Tire & Brakes)
Main Drive Type	Spiral bevel gear, single stage
Final Drive Reduction Type	Planetary type, single stage
Rear- oscillation +/-	±11°
Engine
Engine Model	WD10G240
Rated Power	178kW
Rated Speed	2,000r/min
Displacement	9.7L
Implement Hydraulic System
Implement System Type	Open center flow sharing
Boom Raise Time	5.7s
Hydraulic Cycle Time	9.8s
System Pressure Setting	20MPa
Brake System
Service Brake	Dry & caliper, air to oil contro
Parking Brake	Drum/Shoe
Steering System
System Type	Load sensing
Steering Pump Type	Piston pump
System Pressure Setting	18MPa
Steering Angle (L/R)	38±1°
Tires
Size	23.5-25
Type	Bias
Layer	20
Textured Type	L-3