Sany stc250 Tech Manual

STC250

STC250 TRUCK CRANE

25 TONS LIFTING CAPACITY

Quality Changes the World

STC250 TRUCK CRANE

2 3

COMPANY BRIFE INTRODUCTION

SANY Automobile Hoisting Machinery is one of the core business unit of Sany Heavy
Industry, mainly engaged in the research and development of high end, mid to large
tonnage crane series, including mobile crane, crawler crane, tower crane and loader crane.
It has two industrial parks in Ningxiang and Huzhou, since entering the market, the products
of Sany Automobile Hoisting Machinery have received worldwide recognition with advanced
technology, lean manufacturing, high reliability and excellent service.

COMPANY BRIFE INTRODUCTION

STC250 TRUCK CRANE

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STC250 TRUCK CRANE

4 5

ICON

STC250 TRUCK CRANE

SELLING POINTS

SANY TRUCK CRANe

CONTENT

04 Icon
05 Selling Points
06 Introduction
09 Dimension
10 Technical Parameter
11 Operation Condition
12 Load Chart
14 Wheel Crane Family Map

Cab

Hydraulic system

Control system

Telescopic system

Luffing system

Slewing

Counterweight

Safety system

Hoist system

Carrier frame

Outriggers

Engine

Transmission system

Drive/Steer

Axles

Tyres

Brakes system

Electrical system

Suspension system

Telescopic boom

Lattice jibs

Superlift devices

Luffing lattice jib

winch mechanism:

Excellent and stable chassis performance /
chassis system

Double-axle drive is used, providing good trafficability and
comfortableness under complex road condition with reliable
traveling performance.
Engine has the multimode power output function, which reduces
power consumption.

Highly efficient, stable, energy-saving
and adjustable hydraulic system

Triple gear pump, load feedback and constant power control
are applied to provide strong lifting capacity and good micro­mobility. Unique steering buffer design is applied to ensure
stable braking operation.

Ultra long, super strong and highly sensitive
load lifting capacity

Four-section boom of high strength steel structure and optimized
U-shaped cross section reduces weight significantly with higher
safety rates. Jib mounting angles are 0°, 15° and 30°, which
ensures fast and convenient change-over between different
operating conditions so as to improving working efficiency of the
machine.

Safe, stable, advanced,
and intelligent electric control system

Self-developed controller SYMC specially for engineering
machinery is configured. The adoption of CAN-bus full-digital
network control technology ensures stable control signal, simple
harness and high reliability. Timely feedback of data information
can achieve the monitoring of the overall working status in real­time. The load moment limiter equipped with the comprehensive
intelligent protection system is used with accuracy within 3%
to provide a comprehensive logic and interlock control, thus
ensuring more safe and reliable operation.

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STC250 TRUCK CRANE

6 7

INTRODUCTION

STC250 TRUCK CRANE

INTRODUCTION

Superstructure Superstructure

Cab

Hydraulic system

Control system

■

It is made of safety glass and anti-corrosion steel plate with ergonomic design such as
full-coverage soften interior, panoramic sunroof and adjustable seats etc., and humanized
design providing more comfortable and relaxing operation experience. The display of load
moment limiter integrates main console and operation display system, which clearly show
the data of all operating superstructure conditions for lifting operation.

■

High-quality key hydraulic components such as main oil pump, rotary pump, main valve,
winch motor and balancing parts etc. are adopted to achieve stable and reliable operation
of the hydraulic system. Superior operation performance is guaranteed by accurate
parameter matching.

■

Main valve has flow compensation, load feedback control function, enabling stable
and convenient control of single action and combined action under different operation
conditions

■

Winch adopts the variable motor to ensure high operation efficiency. Max. single line

speeds of main and auxiliary winches is up to 120m/min which ensures the lifting effi ciency

take the lead in industry.

■

The use of new slewing system ensures more stable starting and control of the slewing
operation and excellent micro-mobility.

■

Hydraulic oil tank capacity: 480L

■

CAN-bus instrument: CAN-bus instrument with a combined intelligent control electrical
system is used for easy reading of the traveling parameters at any time. The engine fault
warning function is applied, ensuring convenient and fast troubleshooting.

■

Load moment limiter: The adoption of high intelligent load moment limiter system can
comprehensively protect lifting operation, ensuring accurate, stable and comfort operation.

■

With fully security protection system, main and auxiliary winches are equipped with over­roll out limiter and height limiters to prevent over-rolling out and over-hoisting of steel rope,
including tip-over and limit angle protection.

Slewing system

Hoisting system

Safety system

Counterweight

■

360° rotation can be achieved with Max. slewing speed of 2.0r/min., providing stable and

reliable operation of the system. Single-row ball slewing ring is applied for strong bearing
capacity, good stability, high safety and good micro-mobility.

■

The winch adopts the electronic control variable plunger motor, enabling convenient
switch-over between low load high speed mode and high load low speed mode, and

ensuring highly effi cient operation and stable lifting and lowering of the load.

■

One main hook: 320Kg, one auxiliary hook: 90Kg. Wire rope of main winch: left-handed
wire rope 16-35W×7-1960, with length of 175m. Wire rope of auxiliary winch: left-handed
wire rope 16-35W×7-1960, with length of 105m.

■

Load moment limiter: Load moment limiter calculation system based on lifting load
mechanical model is established using an analytical mechanics method, with rated lifting
accuracy up to ±3% through on-line non-load calibration, providing full protection to lifting
operation. In case of overload operation, system will automatically issue an alarm to provide
safety protection for manipulation.

■

Hydraulic system is configured with the balance valve, overflow valve, and two-way
hydraulic lock etc. components, thus achieving the stable and reliable operation of the
hydraulic system.

■

Main and auxiliary winches are equipped with over roll-out limiter to prevent over rolling-out
of wire rope.

■

Boom and jib ends are equipped with height limiters respectively to prevent over-hoisting of
wire rope.

■

Equipped with length sensor, angle sensor and press sensor to indicate the working
condition of whole crane in real-time, giving an alarm and cutting off the dangerous action
automatically.

■

Counterweight is 3800kg, no fl exible counterweight.

Luf ng system

Telescopic system

■

Dynamic luffing system with controllable speed provides more stable luffing operation.

Luffi ng angle: -2°~80°.

■

Four-section boom is applied with basic boom length of 10.65m, fully extended boom
length of 33.5m, jib length of 8m and fully extended boom lifting height of 34m respectively.
Max. lifting height is 42m including jib.

■

It is made of fi ne grain high-strength steel with U-shaped cross section and with telescopic

operation controlled independently by dual-cylinder rope.

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STC250 TRUCK CRANE

8 9

INTRODUCTION

STC250 TRUCK CRANE

DIMENSION

Chassis

■

Cab

Carrier frame

Axles

Engine

Cab is made of new steel structure self-developed by SANY, featuring excellent shock
absorption and tightness, which is configured with swing-out doors at both sides,
pneumatically suspended driver’s seat and passenger's seat, adjustable steering wheel,
large rearview mirror, comfortable driver’s chair with a headrest, anti-fog fan, air conditioner,
stereo radio and complete control instruments and meters, providing more comfortable,
safe and humanized operation experience.

■

Designed and manufactured by SANY, anti-torsion box structure is welded by fi ne-grain

high-strength steel plate to provide strong load bearing capacity.

■

Axles 2 and 3 are drive axles and axles 1 is steering axles, axle and wheel differentials are
installed in axles 2 and 3.The use of welding process for axle housing provides stronger
load bearing capacity.

■

Type: Inline six-cylinder, water cooled, supercharged and inter-cooling diesel engine

■

Rated power: 213kW/2100( r/min)

■

Environment-protection: Emission complies with EuroⅢ standard

■

Capacity of fuel tank: 300L

（10650～33500）

1375

3550

2597

1402

12°

1575

17°

4325 1350 2615

400

3247

Transmission system

Brakes system

Suspension system

Steering system

Outriggers

Tyres

■

Gearbox: Manual / Automatic gearbox is adopted with 9-gear and large speed ratio range
applied, which meets the requirements of low gradeability speed and high traveling speed.

■

Transmission shaft: With optimized arrangement of the transmission shaft, the transmission
is stable and reliable. For most optimized transmission, plate flange is used with large
transmission torque.

■

Brakes system includes traveling brake and parking brake.

■

All wheels use the air servo brakes and dual-circuit brake system, engine is equipped with
an exhaust brake.

■

All axles adopt the plate spring suspension systems with plate spring passed 100,000
fatigue tests and with optimization of performance parameters of the front and rear plate
springs applied to ensure strength and also to provide comfort ridding.

■

Hydraulic power mechanical steering systems are applied for axles 1 with unloading valve
installed in the steering gear.

■

Four-point supporting of the H-shaped outriggers ensures easy operation and strong

stability, with Max. span up to 5.3m×6.2m.They are made of fi ne-grain high-strength steel

sheet, movable outriggers are full hydraulic transverse telescopic.

■

11 (number of tyres) – spec.: 11.00-20 ; diagonal tires are adopted, which features with
large load bearing capacity and durability.

R12000

R11500

R11000

R10000

Ø400

3100

2976.5

5300

5300

2200

2323.5

6200

2500

Electrical system

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■

With 2*12V maintenance-free batteries, the crane power can be cut off manually via a
mechanical master power switch.

10 11

STC250 TRUCK CRANE

TECHNICAL PARAMETER

OPERATION CONDITION

STC250 TRUCK CRANE

STC250 Working Ranges

Type Item Parameter

Capacity Max. lifting capacity 25t

Overall length 12750mm

Overall width 2500mm

Dimensions

Weight

Traveling

Main Performance
Data

Working speed

Aircondition

Overall height 3550mm

Axle distance

Axle-1,2 4325mm

Axle-2,3 1350mm

Overall weight 30000kg

Axle load

Axle load-1 6500kg

Axle load-2,3 23500kg

Rated power 213kW/ 2100 rpm

Rated torque 1050N.m/ (1200～1400) rpm

Max.traveling speed 80km/h

Turning radius

Min.turning radius 10m

Min.turning radius of boom head 12m

Wheel formula 6 × 4

Min.ground clearance 220mm

Approach angle 17 °

Departure angle 12 °

Max.gradeability 38%

Fuel consumption per 100km ≤ 37 L

Temperature range – 30 ℃ ~ + 60 ℃

Min.rated range 3m

Tail slewing radius of swingtable 3.37m

Boom section 4

Boom shape U-shaped

Base boom 962kN·m

Max.lifting moment

Full-extend boom 544kN·m

Full-extend boom+jib 341kN·m

Base boom 10.65m

Boom length

Full-extend boom 33.5m

Full-extend boom+jib 41.5m

Outrigger span (Longitudinal×Transversal) 5.3 × 6.2m

Jib oset 0°,15°,30°

Max.single rope lifting speed of main winch (no load)

Max.single rope lifting speed of auxiliary winch (no load)

120m/min

≧

120m/min

≧

Full extension/retraction time of boom 70 / 50s

Full lifting/descending time of boom 70 / 55s

Slewing speed (0~2)r/min

Aircondition in up cab Cooling and Heating

Aircondition in low cab Cooling and Heating

25.9m

Lifting height (m)

22.1m

18.3m

14.5m

10.65m

33.5m

29.7m

9.2

11

15

18

25

0°

15°

2.8

7.5

7.5

7.5

9.15

9.2

9.15

8.9

11

11

11

11

14.9

14.9

14.5

13.8

13.3

18

18

17

16.5
16

14.5

25

24.3

21.8

18.9

17.3

15.8

7.4

8.3

9.5

11.3

12.2

12.2

6.15

2.35

30°

2.8

2.75

2.6

2.2

1.7

5.6

5.1

4.8

6.5

6.2

5.7

5.2

7.6

7.2

6.5

5.7

8.5

7.55

6.7

5.8

9.8

8.25

6.9

5.85

10

8.5

7.5

6.25

9.7

1.6

4.38

4.8

5.1

5.1

5.16

5.5

2.05

4.2

4.4

4.51

4.55

4.6

1.5

3.85

3.9

3.95

4

4

1.9

2.15

3.15

3.15

3.15

3.2

2.9

2.85

2.8

2.8

1.65

1.35

2.55

2.58

2.58

2.6

2.2

2.2

2.21

1.8

1.45

1.25

1.3

1.2

0.95

1.15

0.85

1.97

1.8

1.6

1.4

1.3

2

1.8

1.6

2.05

1.8

1.65

1.1

1.4

1.45

3.7

3.55

3.55

3.5

3.5

45m

44

43

42

41

40

39

38

37

36

35

34

33

32

31

30

0.8

29

28

27

26

25

24

23

22

21

20

19

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

17 18 19 20 21 22 23 24 25161514131211109876543

28m2726

Radius (m)

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STC250 TRUCK CRANE

LOAD CHART

Unit:Kg Unit:Kg

STC250 TRUCK CRANE

LOAD CHART

Prerequisites

Boom operating condition(fully extended boom length),min.length is 10.65 and.max.length is 33.5m

①

The span of outrigger is 5.3×6.2m

②

360°rotation is applied

③

Counterweight is 3.8T

④

Working range(m)

3.5 25000 18000 15000

4.5 21820 17000 14900 11000 9200

5.5 17350 16000 13800 11000 9150 7500

Number of lines 8 8 6 4 4 4 3 Number of lines

：

Main boom

10.65 14.5 18.3

3 25000 18000

4 24300 18000 14900 11000 9200

5 18900 16500 14500 11000 9150 7500

6 15800 14500 13300 11000 8900 7500

7 12200 12200 11300 9500 8300 7400

8 9700 10000 9800 8500 7600 6500 6150 8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

Ⅰ 100% 100% 100% 100% 100% 100% 100% Ⅰ

Ⅱ 0 17% 34% 50% 67% 84% 100% Ⅱ

Ⅲ 0 17% 34% 50% 67% 84% 100% Ⅲ

Ⅳ 0 17% 34% 50% 67% 84% 100% Ⅳ

8500 8250 7550 7200 6200 5600 9

7500 6900 6700 6500 5700 5100 10

6250 5850 5800 5700 5200 4800 11

5500 5160 5100 5100 4800 4380 12

4600 4550 4510 4400 4200 13

4000 4000 3950 3900 3850 14

3500 3500 3550 3550 3700 15

Telescoping condition(%)

22.1

3200 3150 3150 3150 16

2800 2800 2850 2900 17

2600 2580 2580 2550 18

25.9

2210 2200 2200 19

2050 2000 1970 20

1800 1800 1800 21

1650 1600 1600 22

29.7

1400 1400 23

33.5

1300 24

1100 25

Working range(m)

3

3.5

4

4.5

5

5.5

6

7

Prerequisites：

Boom operating condition( fully extended boom length + jib length),max. length is 33.5m+8m

①

The span of outriggers is 5.3×6.2m

②

360°rotation is applied

③

Counterweight is 3.8T

④

Main boom angle

78° 2800 2350 1700

75° 2800 2200 1600

72° 2750 2050 1500

70° 2600 1900 1450

65° 2150 1650 1350

60° 1800 1450 1250

55° 1300 1200 1150

50° 950 850 800

0° 15° 30°

Main boom+Jib

1. Values listed in the table refer to rated lifting capacity measured at at and solid gound under the lever state of the crane.

2. Value above heavy line shall be determined by strength of the crane and under this line shall be determined by stability of the crane.

3. Rated load values determined by stability shall comply with ISO 4305.

4. Rated lifting capacity listed in the table included weights of lifting hooks (320kg of main hook and 90kg of auxiliary hook)and hangers.

5. Rated lifting capacity with pulley at boom tip shall not exceed 3500kg.

6. If actual boom length and range are between two values specied in the table, larger value will determine the lifting capacity.

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14

STC250 TRUCK CRANE

WHEEL CRANE FAMILY MAP

Quality Changes the World

Quality Changes the World

SANY AUTOMOBILE HOISTING MACHINERY

Address: SANY Industrial Park, Jinzhou Development Zone,
Changsha, Hunan, China.
Service Hotline: [phone]
Email: [e-mail]
For more information, please visit: www.sanygroup.com

For our consistent improvement in techonology, speci cations may change without notice.

The machines illustrated may show optional equipment which can be supplied at additional cost.

Version: 2015.08

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