Maeda MC-305C-2 - Principle Specification List

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7. PRINCIPLE SPECIFICATION LIST
System / Item MC-305C-2 (Engine and Electric Motor Specifications)
Mass and
dimensions
Machine mass 4080kg
Overall length  width 
height
4285mm x 1280mm x 1695mm
Distance between idler
and sprocket
1750mm
Track gauge 980mm
Track width 300mm
Capacity
Maximum rated total load
 working radius
2.98t x 2.5m
Maximum working radius 12.16m
Maximum lifting height 12.52m
Winch
system
Method
Swash plate axial piston motor, planetary gear deceleration,
friction plate brake
Winding speed
Engine operation:13.5m/min, Electric operation:9.125m/min
(4th drum, 4 ropes)
Hoisting rope IWRC 6 x WS (26) 0/0 Type B φ8 x 73m
Boom
telescoping
system
Method
Sequentially telescoping hydraulic cylinder (3 pieces) +
Sheave-embedded wire rope expansion device (1 piece),
(With a hydraulic automatic locking device)
Boom type
Pentagonal section, hydraulic automatic extension,
5-stage boom (Stage 2/3: Sequentially telescoping,
Stage 4/5: Simultaneous telescoping)
Boom length 3.695m – 5.945m – 8.145m – 10.315m – 12.485m
Boom telescoping stroke/
time
Engine operation: 8.79m/26sec
Electric operation: 8.79m/39.6sec
Derrick
system
Method
Direct push-type hydraulic double-acting cylinder (2 pieces),
(With a hydraulic automatic locking device)
Derrick angle/ time
Engine operation: 0 to 80 deg./14.5sec,
Electric operation: 0 to 80 deg./19.9sec
Slewing
system
Method
Swing bearing, hydraulic motor drive,
Reduction gear: Worm + Reduction spur gear,
Brake: Worm-selflock
Slewing angle/ speed
Engine operation: 360 deg. (continuous)/ 25sec (2.4min
-
1
)
Electric operation: 360 deg. (continuous)/ 36.7sec (1.6min
-1
)
Outrigger
system
Method
Extension/ground: Direct push-type hydraulic cylinder
(With a hydraulic automatic locking device)
Overall width of extended
outriggers
(Front) 4504mm x (Right/left) 4888mm x (Rear) 4396mm
Traveling
system
Method
Hydraulic two-speed motor drive, Variable speed,
Built-in brake
Travel speed Forward/backward: 0 – 2.8km/h (engine operation)
Gradeability 23 deg.
Ground pressure 36.3kPa (0.37kgf/cm
2
)
Hydraulic
system
Hydraulic pump
Engine operation: Double-throw variable piston pump
(13cc/rev x 2)
Electric operation: Double-throw variable piston pump
(8.6cc/rev x 2)
Rated pressure
Traveling: 20.6MPa (210kgf/cm
2
)
Crane high-pressure relief: 20.1MPa (205kgf/cm
2
)
Crane low-pressure relief: 4.41 to 6.37MPa (45 to 65kgf/cm
2
)
Hydraulic oil tank capacity 56L