140t crane introduction€¦ · history •introduced in art in place of 75t steam crane in 1987...
TRANSCRIPT
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140T Crane Introduction
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Objectives
• List 10 major crane items.
• Understand SLI functioning
• List 5 failure prone Hydraulic items.
• List 5 failure prone Pneumatic items.
• List 5 important consumable items.
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General Arrangements
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140T Gottwald Design Crane
Old Design New Design
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Jib
Counter weight slabs
Rear frame A Frame Briddle
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140T NEI(Cowans) Design Crane
Old Design New Design
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History
• Introduced in ART in place of 75T steam crane in 1987
• 2 major variants of Gottwald Design – Old Design and New Design
• Old Design (1986 to 2001) – Imported #12&manufactured at JMP #10
• New Design (1998 to Till date) – Imported #8&manufactured at JMP #28
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Salient Features
• All motions hydraulically controlled except brake system.
• Provision of safe load indicators
• Quick response in motions
• Maxm. Speed 100 KMPH
• Loaded Wagon Handling
• Slewing by 360° with 140 Ton load at 6M radius.
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Features of New Design over Old
• Cwt falling is sorted out by R/F
• Two positions of tail radius-5.5m & 6.5m
• Five positions of prop
• Jib length increased by one m
• Shear pin introduced in AUX hook
• External threads in slewing ring
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Features of New Design
• No need of radiator cooling pump
• Vertical power pack
• Better design of fuel tank
• Direct gear pump is used for hyd oil cooling
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Hyd Oil
• Low compressible
• Less viscosity w.r.t pressure
• Lubrication & anti wear quality
• High density
• Fire resistant
• Non toxic
• Good thermal conductivity
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MAJOR CRANE ITEMS
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Crane Bogie
• Each Fabricated bogie with three axle sets.
• Coil & Disc springs are fitted in suspension.
• CRU fitted on axle inside the wheel.
• Brake disc fitted each wheel.
Brake Cylinder Axle Blocking
Cylinder
Brake Disc
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Super Structure
Main Engine NTA855 LBC
Aux. Engine
Hyd. Tank
Multi Spool Valve M1
Solenoid Valve
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Cabin
Joy Stick
Engine Control Unit Display Board
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Out Rigger Assly with Propping Cylinder
15 Propping Cylinder Out Rigger Cylinder
Used during propping the crane
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Rear Assly with Counter Weight Slabs
Old(5T+14T+6T+18T)
New(8T+15T+24T)
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Match Truck
• Used to rest jib.
• Keep main hoist & aux. hoist hook assly.
• Keep Counter weight slabs.
• Keep lifting tackles.
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Main hook assly Lifting Tackles
Jib
Match Truck
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Main Engine(NTA 855 LBC)
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• Six cylinder inline engine
• Power-290 HP
Main Engine
Suction Hose
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Wire Ropes
Wire Ropes
Wire Rope Sling
Main Hoist Wire Rope
Derrick Hoist Wire Rope
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Nylon Pulleys
• Used with wire ropes to hoist & lower the load.
• Main hook assly hangs through pulleys assembled on pin.
• Diagonal hoisting is prohibited as pulley’s edge s are damaged.
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FAILURE PRONE HYDRAULIC ITEMS
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Change Over Valve No-34
• Valve no-34 actuates hydraulically & works through pneumatically during axle blocking.
• Used for gear shifting arrangement in under carriage
Valve No-34
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Valve Plate Assly
• It is a bridge of check valves.
• Used for control hydraulic supply to rear end cylinders
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Rear Frame with Counter Weight Cylinder
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Hyd. Valve Failure
• Causes
– Seal defective,
– Internal spring defective,
– Valve seat worn out
• O/H & replace the damaged seals.
• Cost of kit=80% of new item cost.
• Repair is uneconomical
• Hence replace.
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Hyd. Hoses Failure
• Cause of failure
– End fittings damaged
– Rubber portion damages
– (pin hole,rupture)
– Wearing of surface in flange type end fittings
• Solution- Replace
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FAILURE PRONE PNEUMATIC ITEMS
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Air Brake Cylinder-Failure
• Causes
– Rusting and accumulation of dirt
– Seals and bellows damaged,
– Spring damaged.
• Over Haul & replace the seal kit.
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Gear Shifting Cylinder
• Works pneumatically & used to shift the pinion of travelling gear box for engaging/disengaging with axle gear.
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Gear shifting cylinder
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Pressure Reducing ValveDMV-9
Up to 5 Bar in U/C Up to 3.8 Bar in S/S
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Oil Extractor
• Fitted before unloader valve in super structure.
• Remove the oil,dust from compressed air received from compressor.
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Unloader Valve
• Used to keep system pneumatic pressure constant at 6.8 bars
• Fitted in super structure after oil extractor.
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Unloader valve
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Hyd. Filters
Lube Oil Filter Fuel Oil Filter
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Hyd. Filters
Return Line Filter
Slew Line Filter
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Modifications done in 140T Crane
• In MT to accommodate HS Casnub bogie for speed upgradation up to 100 KMPH.
• Retro fitment of PTO Unit in Old Design.
• Implementation of Pure Air Brake System in all cranes.
• Introduction of Parker fittings & tubes to minimise the frequent leakages in Hyd circuit.
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Continued-
• Change in design of Limit switch to achieve fine settings.
• Replacement of SHULE make auxiliary engine by KOEL make engine in OLD design crane.
• Speed Modification of 80 kmph to 100 kmph by providing Hyd dampers.
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Hydraulic components
• Hyd. Pumps
– External tandem gear pumps
– Variable displacement axial piston pumps bent axis design or swash plate design.
• Hyd. Motors
• Hyd. Cylinders
• Hyd. Valves
• Control Blocks.
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External Tandem Gear Pumps
(Q8+Q9) For Aux. Engine
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External Gear Motors
Oil cooler motor
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Axial Piston Pump Bent Axis Design
Q1 &Q2(for all operations except slew)
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Axial Piston Pump Swash Plate Design
Q1 & Q2
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Hyd. Motor
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Hyd. Cylinders
Propping Cylinder
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Hyd. Cylinders
Out Rigger Cylinder Axle Suspension Blocking Cylinder
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Hyd. Cylinders
Counter Weight Cylinder Boom Root Cylinder
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Thank you