A mobile cranes are machine that could lift, pull, tug, carry, and do many such things that are done on a large scale. It is a cable-controlled crane mounted on crawlers or rubber-tired carriers or a hydraulic-powered crane with a telescoping boom mounted on truck- type carriers or as self-propelled models. They are commonly used in the construction industry and in the manufacturing of heavy equipment. Rough Terrain Crane A crane that is mounted on an undercarriage with four rubber tires, designed for operations off road. The outriggers extend vertically and horizontally to level and stabilize the crane when hoisting. These types of cranes are single engine machines where the same engine is used for powering the undercarriage as it is for powering the crane. In these types of cranes, the engine is normally mounted in the undercarriage rather than in the upper portion. These cranes can go from the paved highway to the rocky landscape of a job site. They can reach speeds necessary to travel on public highways, yet have the power necessary to handle a variety of construction tasks. This mainstay of the heavy equipment industry main asset is its versatility. All terrain cranes can handle up to 1,300 short tons of weight Telescopic handler cranes are essentially forklift trucks with a telescoping boom attached to them. These cranes can be driven in 360 degrees and are often used for tasks like moving pallets of bricks or hoisting framing trusses in place. Telescopic handler cranes are essentially forklift trucks with a telescoping boom attached to them. These cranes can be driven in 360 degrees and are often used for tasks like moving pallets of bricks or hoisting framing trusses in place. Telescopic handler cranes are essentially forklift trucks with a telescoping boom attached to them. These cranes can be driven in 360 degrees and are often used for tasks like moving pallets of bricks or hoisting framing trusses in place. Telescopic handler cranes are essentially forklift trucks with a telescoping boom attached to them. These cranes can be driven in 360 degrees and are often used for tasks like moving pallets of bricks or hoisting framing trusses in place. Telescopic handler cranes are essentially forklift trucks with a telescoping boom attached to them. These cranes can be driven in 360 degrees and are often used for tasks like moving pallets of bricks or hoisting framing trusses in place. Telescopic handler cranes are essentially forklift trucks with a telescoping boom attached to them. These cranes can be driven in 360 degrees and are often used for tasks like moving pallets of bricks or hoisting framing trusses in place. Telescopic handler cranes are essentially forklift trucks with a telescoping boom attached to them. These cranes can be driven in 360 degrees and are often used for tasks like moving pallets of bricks or hoisting framing trusses in place.

1. SELECTION, OPERATION AND
MAINTAINANCE OF MOBILE CRANES
PRESENTED BY
SWAROOP K S
[R15ME295]
‘C’ SECTION
UNDER THE GUIDANCE OF
PROF. L R JAGDESSH
SCHOOL OF MECHANICAL ENGINEERING

2. MOBILE CRANES
A mobile cranes are machine that could lift, pull, tug, carry, and do many such things that are
done on a large scale. It is a cable-controlled crane mounted on crawlers or rubber-tired
carriers or a hydraulic-powered crane with a telescoping boom mounted on truck- type
carriers or as self-propelled models. They are commonly used in the construction industry
and in the manufacturing of heavy equipment.

3. WHY MOBILE CRANES ?
Mobility: can be used in different locations and also at any condition over a short duration
Maneuverability:Caneasilymovethrough sandandgravelaswell astravel smoothly on asphaltroadsandhighways.It hasthe
capability to travel from siteto site independently.
Strongliftingcapacity: Capacityrangesfrom 40to 1,000tons andreachesheightsofup to 500feet offering both powerand
precision
Compact:Compactdesignisacombination of atruck-mounted craneandarough-terrain crane

4. SELECTION / TYPES
• AVAILABLITY
• COST
• PURPOSE

5. Rough Terrain Crane A crane that is mounted on an undercarriage with four rubber
tires, designed for operations off road. The outriggers extend vertically and
horizontally to level and stabilize the crane when hoisting. These types of cranes are
single engine machines where the same engine is used for powering the
undercarriage as it is for powering the crane. In these types of cranes, the engine is
normally mounted in the undercarriage rather than in the upper portion.
ROUGH TERRAIN CRANE

6. Truck-mounted cranes amount for approximately 75 percent of all cranes in service today.
This type of crane is adaptable to a wide-range of jobs, can hoist between 14.5 and 1,300
short tons, and can drive down the highway rather than having to be transported. Many
truck-mounted cranes can swivel a full 360 degrees
TRUCK MOUNTED CRANES

7. SIDE LIFTER or LOADER CRANES
A side lifter crane is permanently-mounted on the top of a flatbed truck or a railroad
car. These types of cranes are most often used to load and unload containers, but
can also have some construction applications.
Aloader craneisahydraulically poweredarticulated armfitted to atrailer,usedto load
equipmentonto atrailer. Thenumeroussectionscanbefolded intoa smallspacewhen the
craneisn’t inuse.

8. These cranes can go from the paved highway to the rocky landscape of a job site. They
can reach speeds necessary to travel on public highways, yet have the power necessary
to handle a variety of construction tasks. This mainstay of the heavy equipment industry
main asset is its versatility. All terrain cranes can handle up to 1,300 short tons of weight
ALL TERRAIN CRANES

9. Telescopic handler cranes are essentially forklift trucks with a telescoping boom attached to
them. These cranes can be driven in 360 degrees and are often used for tasks like moving
pallets of bricks or hoisting framing trusses in place.
TELESCOPIC CRANE

10. These heavy-duty cranes move on treads (called crawlers) rather than wheels.
Their chief advantages are their stability and the fact that they can handle
weights up to 3,500 short tons. These cranes are unlikely to get stuck in the
mud. However, they have to be disassembled and transported to the work site
via rail car or truck.
CRAWLER CRANES

11. SELECTION
Sl.no specification Rough
terrain
crane
Truck
mounted
crane
All terrain
crane
Telescopic
crane
Crawler
crane
Loader /
side lifter
cranes
1. Load capacity 300 ton Up to 1500
tons
up to 1500
tons
300 tons Up to
3500tons
Up to
300tons
2. Boom movement limited 360 degree 360 degree limited 360 degree limited
3. Cost(rs) 90 lakhs 1.2-1.5 crore 1.2-3 crores 90lakhs 90lakhs >60lakhs
4. purpose Off road
lifting
Construction
dockyard
All uses,
off road
Short
loading
Heavy
loading
Inside
industry
5. AVAILABLITY yes yes yes yes yes yes
6. Operator availablity yes yes yes yes yes rare

12. OPERATIONS
and
WORKING

13. • stage 1 : inspection of soil condition , marking of power lines , mapping the swing area.
• stage 2 : accepting the job , selecting suitable machine and operator,
• stage 3 : building the set up , transporting machine, plannng and scheduling
• stage 4 : execution of work .
• stage 5 : closing the job .
1 2 3 & 4
5

15. Mobile cranes can do many operations and have many applications,
Major operations that are performed by mobile cranes are
1. Lifting operation.
2. Loading and unloading operations.
3. Pulling operation.
4. Demolition operation.
5. Various construction operation.
6. Emergency rescue and disaster management operation.

16. Loading
Cranes are commonly employed in the transport industry for the loading and
unloading of freight.
In the construction industry for the movement of materials, and in the
manufacturing industry for the assembling of heavy equipment.

17. Lifting
Generally, crane is controlled and driven by an operator inside the cab. The slewing ring
beneath the cab allows for a 360-degree turning circle, and the boom extends upwards
supported by suspension ropes.
Truck-mounted cranes are mounted on a truck or lorry specially adapted to carry an
increased load. The lorry can be driven from a front cab as a conventional vehicle, as well as
having additional contrls for a lattice mast or telescopic boom which extends in sections. Fly
jib attachments can be used for lattice cranes to increase lifting capacity

18. Demolition
However crane mounted demolition balls are rarely used withindemolition due to the
uncontrollable nature of the swinging ball and the safety implications associated. High
reach demolitionexcavators are more often used for tall buildings where
explosivedemolition is not appropriate or possible.

19. Emergency
For rescuers, a crane is just another tool in the toolbox – one that can serve as temporary,
stationary high-point making the rescue operation an easier task. However, There are simply
too many potential downfalls in using cranes. This also applies to fire department aerial
ladders.

21. inspection : crane will be inspected with inspection sheet and will be sent to service engineer.
Repair : replacing of parts , lubricating, adjusting and general service will be done.
Testing : once service is done again inspection sheet will be filled and tested for the feedback.
testingRepair InspectionInspection

22. Good maintainance includes
• Maintaining a safe work environment
• Pre-operational checks
• Routine inspection and maintenance
• Annual inspection
• Major inspections
• Record keeping
• Using it for right purpose
• Safety priority

23.  Chassis including outriggers and boxes
 Drive train and suspension components
 Slew ring
 Slew ring bolts
 Hook rollers
 Drive systems including winches, hydraulic motors, gearboxes and drive-shafts
 Control systems
 Braking systems
 Electrical systems
 Hydraulic systems—cylinders including outrigger cylinders
 Booms
 Safety devices including rated capacity limiters and load indicators
 Outriggers
 Steel wire ropes, and
 Rope sheaves.
 Electrical systems—hazardous voltage
 Control systems—non-hazardous voltage
 Electric motors
 Hook assembly
Inspection sheet

24. Routine inspections can take place weekly, monthly or quarterly and should
include an inspection of:
• crane functions and the controls for speed, smoothness of operation and limits
of motion
• emergency and safety switches and interlocks including limiting and indicating
devices
• lubrication of moving parts
• verify accuracy of any load moment indicator (LMI) and rated capacity indicator
devices with a test lift using a certified test weight
• filters and fluid levels and leaks
• visual inspection and measurements as necessary of structural components and
critical parts including brakes, gears, fasteners, pins, shafts, wire ropes, sheaves,
locking devices and electrical contactors
• signage including warning signs and control markings
• wear on wheels and tyres.
• extra items nominated in the crane manufacturer’s instructions.

25. overloading Driving speed Wrong purpose
Using near electric lines
DON’T