Caterpillar SEM638 Wheel loader

SEM638 Wheel loader
Main features
1, Engine: be reoptimized and rematched, improved efficiency and performance, improved cold start capacity.
2, Cooling: Designed by CRDC (Caterpillar China Research & Design Center), the cooling system brings end results of optimal cooling efficiency, increased fuel efficiency, less radiator plugging even under extreme hot temperature or dusty work environment.
3, Transmission: Countershaft design; advanced structure, high transmission efficiency; durable, ease of service and numerous shifts allow high travel speed; two modes available for multiple operation, one for material handling and one for travel; refined for heavy duty application.
4, Axle: Meritor axle, reliability function.
5, Cab: Improved operator comfort and visibility; Reduced in cab noise, meet GB standard, Reliability improved; integrated FOPs/ROPs cab is available.
6, Electrical: Large capacity Delphi battery; High quality electrical components.
7, Structure: Finite Element Analysis (FEA) design, refined for heavy duty application.
8, Hydraulic: VALVE [CCMC (Caterpillar China Machinery Component) components; Single lever, joystick controlling (optional)]
HOSE [CCMC hose, improved strength and reliability, optimized hose and tube routing]

Engine
Engine----Cummins6BT5.9
Rated speed---- 2400rpm
Rated power---- 92kw
Cylinder*bore ý?stroke----6*102mmý?20mm
Max. torque ----- 425Nm
Displacement---- 5.88L

Transmission system
Torque converter----- 3-element, single stage
Transmission-----SEM TR-150 countershaft
Gearshift------ £® £¯ £° IV
Forward------- 7.7 14.2 26.5 43.6(km/h)
Reverse------ 9.7 32

Axle
Four wheel drive, front axle fixed, rear axle oscillating, oscillating angle of rear axle +/-12 degree

Hydraulic system
Working pressure---- 16.5MPa
Boom lifting time ----4.82s
Bucket dumping time ----1.07s
Boom lowering time ----3.24s
Pilot controlling

Brake system
Service brake ------Air assisted oil disc type four wheel brake
Parking brake------ Spring applied air released inner hoof type

Steering system
Pivoting angle of frame -----38 degree
Load sensing hydraulic steering system

Tank capacity
Fuel tank ------- 151L
Hydraulic tank ------- 138L

Tire
Size----- 17.5-25

Performance specifications
Breakout force -----128kn
Max. drawing force -----97kn
Operating weight -----9420kg
Bucket capacity -----1.7 / 2.5m§ô


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