Maeda MC285C-2 User manual

102E-SM1110-00
SERVICE MANUAL
MINI-CRAWLER CRANE
Serial No. P00976 and up
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The parts numbers and lists written in this service manual are the
references for the services such as disassembling and assembling.
Be sure to ALWAYS refer to the latest parts catalog (the latest
information) before ordering any part, since the parts and the model
numbers are subject to change during the endless improvements and
changes of our Machine.

SPECIFICATIONS
System and Item MC285C-2
Machine weight 1960kg
Overall length uwidth u
height 2750mm x 750mm x 1470mm
Distance between center
idler and sprocket 975mm
Track gauge 550mm
Weight and
dimensions
Width of crawler 200mm
Crane capacity 2.82t x 1.4m
Maximum working radius 8.2m
Performanc
eMaximum lifting height
above ground 8.7m
Type Hydraulic motor driven with brake, differential planetary gear
type, with counter balance valve(within drum type)
Hook hoist speed 9.3 m/min (4 layers, 4 parts of line)
Winch
system
Hoist wire rope IWRC 6 x Fi (29) 7 mm x 48 m
Type Sequential hydraulic cylinders 2 + wire rope telescoping
systems 2
Type of boom Fully automatic 5-section pentagonal telescopic
(3 to 5 stage: simultaneous telescoping)
Boom length 2.535m – 4.075m – 5.575m – 7.075m – 8.575m
Telescopin
g system
Boom telescoping stroke/
time 6.04 m/22 sec
Type Hydraulic double acting cylinder,direct acting type 2
Boom hoist
system Derricking angle/ time 0 to 80° /14 sec
Type Swing bearing support, hydraulic motor drive, worm and spur
gears, worm self-lock
Slewing
system Slewing angle/ speed 360° (continuous)/60 sec (1.0 RPM)
Type 1st stage with flexible stay damper, 2nd stage manual pullout,
hydraulic cylinder direct acting type
Outrigger
system Max extended width (Front) 3810mm x (Right/left) 4580mm x (Rear) 4530mm
Type Hydraulic motor driven, Step-less speed changer
Travel speed Forward/backward: 0 – 2.2 km/h
Grade ability 20°
Travel
system
Ground pressure 49.3 kPa(0.497䌫䌧䌦/䌣䋛)
Hydraulic pump variable piston pump
Rated pressure 20.6MPa (210kgf/cm2)
Hydraulic
system Hydraulic oil tank capacity 20L
Model Yanmar 2TNV70-NMBA
Type In-line 2-cylinder, water cooled, 4-cycle diesel
Displacement 0.569L (569cc)
Rated output (continuous) 7.4kW/2500min-1 (10.1PS/2500rpm)
Engine
Fuel tank capacity Diesel 12L
Battery Model 55B24R (DC12V x 1 piece)
Safety
device
Over hoist detector, over un-winding detector, angle indicator, hydraulic safety valve, wire rope
latch, level, machine body inclination alarm, EMO Switch, crane outrigger interlock device,
moment limiter, outrigger setting light, working status light
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SPECIFICATION DIMENSIONAL DRAWING
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DIMENSIONAL DRAWING OF OUTRIGGER WIDTH
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RATED TOTAL LOAD CHART
The Rated total load Chart is based on actual working radius with the bending of boom attributable to
load reflected and is shown with the mass of hook block (30kg) included.
RATED TOTAL LOAD CHART FOR 4 FALLS
OUTRIGGER EXTENDED TO MAXIMUM
2.535m/4.075m BOOM 5.575m BOOM 7.075m BOOM 8.575m BOOM
Working
radius (m)
Rated total
load (kg)
Working
radius (m)
Rated total
load (kg)
Working
radius (m)
Rated total
load (kg)
Working
radius (m)
Rated total
load (kg)
1.4 or less 2820 3.0 or less 1220 3.6 or less 820 4.0 or less 550
1.50 2520 3.50 970 4.00 740 4.50 400
2.00 1920 4.00 780 4.50 580 5.00 340
2.50 1570 4.50 630 5.00 480 5.50 300
3.00 1220 5.00 530 5.50 430 6.00 270
3.50 970 5.205 530 6.00 380 6.50 230
3.705 920 -- -- 6.50 350 7.00 200
-- -- -- -- 6.705 330 7.50 180
-- -- -- -- -- -- 8.00 150
-- -- -- -- -- -- 8.205 150
OUTRIGGER EXTENDED TO OTHER THAN MAXIMUM
2.535m/4.075m BOOM 5.575m BOOM 7.075m BOOM 8.575m BOOM
Working
radius (m)
Rated total
load (kg)
Working
radius (m)
Rated total
load (kg)
Working
radius (m)
Rated total
load (kg)
Working
radius (m)
Rated total
load (kg)
1.5 or less 1720 3.0 or less 510 3.6 or less 400 4.0 or less 330
2.00 1070 3.50 410 4.00 330 4.50 280
2.50 630 4.00 330 4.50 280 5.00 230
3.00 520 4.50 280 5.00 230 5.50 180
3.50 390 5.00 200 5.50 180 6.00 160
3.705 350 5.205 200 6.00 160 6.50 130
-- -- -- -- 6.50 130 7.00 100
-- -- -- -- 6.705 120 7.50 80
-- -- -- -- -- -- 8.00 70
-- -- -- -- -- -- 8.205 60
The Rated total load Chart is based on actual working radius with the bending of boom attributable to
load reflected and is shown with the mass of hook block (30kg) included.
4

RATED TOTAL LOAD CHART FOR 2 FALLS
OUTRIGGER EXTENDED TO MAXIMUM
2.535m/4.075m BOOM 5.575m BOOM 7.075m BOOM 8.575m BOOM
Working
radius (m)
Rated total
load (kg)
Working
radius (m)
Rated total
load (kg)
Working
radius (m)
Rated total
load (kg)
Working
radius (m)
Rated total
load (kg)
1.4 or less 1410 3.0 or less 1220 3.6 or less 820 4.0 or less 550
1.50 1410 3.50 970 4.00 740 4.50 400
2.00 1410 4.00 780 4.50 580 5.00 340
2.50 1410 4.50 630 5.00 480 5.50 300
3.00 1220 5.00 530 5.50 430 6.00 270
3.50 970 5.205 530 6.00 380 6.50 230
3.705 920 -- -- 6.50 350 7.00 200
-- -- -- -- 6.705 330 7.50 180
-- -- -- -- -- -- 8.00 150
-- -- -- -- -- -- 8.205 150
OUTRIGGER EXTENDED TO OTHER THAN MAXIMUM
2.535m/4.075m BOOM 5.575m BOOM 7.075m BOOM 8.575m BOOM
Working
radius (m)
Rated total
load (kg)
Working
radius (m)
Rated total
load (kg)
Working
radius (m)
Rated total
load (kg)
Working
radius (m)
Rated total
load (kg)
1.5 or less 1410 3.0 or less 510 3.6 or less 400 4.0 or less 330
2.00 1070 3.50 410 4.00 330 4.50 280
2.50 630 4.00 330 4.50 280 5.00 230
3.00 520 4.50 280 5.00 230 5.50 180
3.50 390 5.00 200 5.50 180 6.00 160
3.705 350 5.205 200 6.00 160 6.50 130
-- -- -- -- 6.50 130 7.00 100
-- -- -- -- 6.705 120 7.50 80
-- -- -- -- -- -- 8.00 70
-- -- -- -- -- -- 8.205 60
The Rated total load Chart is based on actual working radius with the bending of boom attributable to
load reflected and is shown with the mass of hook block (30kg) included.
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RATED TOTAL LOAD CHART FOR SINGLE FALL
OUTRIGGER EXTENDED TO MAXIMUM
2.535m/4.075m BOOM 5.575m BOOM 7.075m BOOM 8.575m BOOM
Working
radius (m)
Rated total
load (kg)
Working
radius (m)
Rated total
load (kg)
Working
radius (m)
Rated total
load (kg)
Working
radius (m)
Rated total
load (kg)
1.4 or less 710 3.0 or less 710 3.6 or less 710 4.0 or less 550
1.50 710 3.50 710 4.00 710 4.50 400
2.00 710 4.00 710 4.50 580 5.00 340
2.50 710 4.50 630 5.00 480 5.50 300
3.00 710 5.00 530 5.50 430 6.00 270
3.50 710 5.205 530 6.00 380 6.50 230
3.705 710 -- -- 6.50 350 7.00 200
-- -- -- -- 6.705 330 7.50 180
-- -- -- -- -- -- 8.00 150
-- -- -- -- -- -- 8.205 150
OUTRIGGER EXTENDED TO OTHER THAN MAXIMUM
2.535m/4.075m BOOM 5.575m BOOM 7.075m BOOM 8.575m BOOM
Working
radius (m)
Rated total
load (kg)
Working
radius (m)
Rated total
load (kg)
Working
radius (m)
Rated total
load (kg)
Working
radius (m)
Rated total
load (kg)
1.5 or less 710 3.0 or less 510 3.6 or less 400 4.0 or less 330
2.00 710 3.50 410 4.00 330 4.50 280
2.50 630 4.00 330 4.50 280 5.00 230
3.00 520 4.50 280 5.00 230 5.50 180
3.50 390 5.00 200 5.50 180 6.00 160
3.705 350 5.205 200 6.00 160 6.50 130
-- -- -- -- 6.50 130 7.00 100
-- -- -- -- 6.705 120 7.50 80
-- -- -- -- -- -- 8.00 70
-- -- -- -- -- -- 8.205 60
The Rated total load Chart is based on actual working radius with the bending of boom attributable to
load reflected and is shown with the mass of hook block (10kg) included.
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WORKING RADIUS AND LIFTING HEIGHT
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STANDARD PRESSURE AND OPERATING TIME CHART
1. OUTRIGGER
(When Oil Temperature 45 – 55 °C)
When Full Accelerating (2600min-1)
Operating Pressure (MPa)
(At Travelling control valve) Operating time (sec)
In 18.6±1 25.4±2
Outrigger (1) Out 15.4±1 20.7±2
In 18.6±1 14.5±2
Outrigger (2) Out 15.4±1 20.0±2
In 18.6±1 13.5±2
Outrigger (3) Out 15.4±1 18.7±2
In 18.6±1 22.9±2
Outrigger (4) Out 15.4±1 19.6±2
2. CRANE OPERATION
(When Oil Temperature 45 – 55 °C)
When Full Accelerating (2600min-1)
Operating Pressure (MPa)
(At Travelling control valve) Operating time (sec)
Raising 10.4±1 13.7±1
Boom Derricking
(0 – 80 deg.) Lowering 14.0±1 16.6±1
Raising 10.5±1 6.4±1
Hoisting (1m, 4layer) Lowering 11.4±1 7.3±1
Extending 10.2±1 23.3±1
Boom Telescoping
(No.1 boom to No.4 boom) Retracting 15.6±1 27.6±2
Clockwise 12.8±1 64.3±3
Slewing (360 deg.) Counter Clockwise 12.7±1 63.4±3
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3. TRAVELLING OPERATION
(When Oil Temperature 45 – 55 °C)
When Full Accelerating
Operating Pressure (MPa)
(At Travelling control valve) Operating time (sec)
Forward ±1 35.0±2
Straight Travelling (20 m) Reverse ±1 35.0±2
4. MICRO SPEED
(When Oil Temperature 45 – 55 °C)
Micro Speed 1 2 3
Setting value
Winding speed (m/min)
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