Under Jurisdiction of Nagpur Court only WESTERN COALFIELDS ...

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LOW HEIGHT LHDSl.noDescription1.0 ITEM DESCRIPTIONLow Height Electro-hydraulically powered Load Haul Dump machine (Hydro-statically power Transmission arrangement isnot acceptable). It should be of articulated construction to enable negotiation of sharp right angle turns in galleries1.1 without repeated maneuvering, and to operate in a mucky floor condition with a maximum gradient of 1 in 6 and crossgradient of 1 in 10.The machine should have only flame proof electricals and shall be fitted with automatic coiling typecable reeling attachment.EIMCO ELECON MAKE MODEL 811 LHD ( LOW HEIGHT )2.0 SCOPE OF SUPPLYDescriptionQuantity Required2.1Number of LOAD HAUL DUMP machine complete with15 nos.FLP electricalDescriptionParameter2.2Gate End Box ( As per enclosed specification ) - 1Not Requiredno. ( for each LHD)2.3 Tool Kit 1 set with each LHD.2.4 Operation & Maintenance manual 4 sets (with each LHD)2.5 Spare parts catalogue 4 sets (with each LHD)2.6 Spare parts catalogue for gate end box Not Applicable2.7First fill of hydraulic oil, FRHF, grade HF-B 68, DGMS Full quantity (with each LHD)approved and Lubricants.a) Pressure Line filter ( 10 microns) – 1 set with each LHD2.8 Set of filter elements for 1st schedule oil replacement/ b) Return line filter ( 25 microns,650LPM) – 1 no .with eachmaintenance period(Ref.Clause No.6.3)LHD3.0 Technical parametrsSR.No. DescriptionParameter3.1 Height of machine Low Height3.2 Overall height with canopy not to exceed 1500 mm ( Max.)3.3 Bucket arrangement Push Plate , front discharge bucket3.4 Bucket capacity Not less than 1.5 Cu. Mtr3.5 Overall length in carrying position shall not be more than 6550 mm3.6Overall length in bucket down ( digging position) shall not be6900 mmmore than3.7 Width 1800 mm approx.3.8 Ground clearance shall not be less than 170 mm3.9 Inner turning radius not to exceed 2400 mm3.10 Outer turning radius not to exceed 4500 mm3.11No. of wheels ( wheel includes Rim, lock ring, tyre,tube & flap5 nos. ( 4 nos. fitted with equipment & 1 no. spare wheel)complete in all respect)3.12 Type and size of tyresTube type,hard rock lug pattern, heat and cut resistant rubber compound,9.00 x 20 – 16 PR3.13 Travel speed at level Not less than 8 KmPHThe machine shall be powered by an FLP induction motor ofrating (continuous) not less than 37 KW, suitable for 525 V ±3.14 Motor6%, 3 Ph, 50 Hz systems and provided with suitablearrangement/ mechanism to receive trailing cable, and shallbe approved by DGMS for use in machine.3.15 Ambient temperature 45 deg. cent.3.16 Humidity 98.00%3.17 Operating time/Duty ContinuousThe plug and socket on the machine shall be suitable to receive trailing3.18 Size of plug and socketcable of size 16 Sq.mm type FT-7 conforming to IS:14494-1998 asamended up to dateHydraulically driven. Length of cable to be accommodated in reeling drum3.19 Type of cable reelerto be furnished. However, the cable reeler shall accommodate not lessthan 100 meter trailing cable.3.20 Axles& Transmission MakeDana Spicer make3.21 Optional power take-off arrangement. The same is provided on service control valve.
4.0 OTHER TECHNICAL CONDITIONSSR.No. DescriptionParameter4.1 Distance (Horizontal length) between front wheel center to Tip of the bucket at rest position (on ground) - Not less than 2550 mm.(The mechanism/arrangement of front wheel, connecting arm and the bucket shall be designed and fabricated in view of maintainingsufficient gap between front wheel & bucket, so that safe and centralized loading on 1000 mm conveyor belt is also possible withoutdamaging the conveyor structure).4.2 The front and rear frames shall be made of heavy duty, having suitable metallurgical composition and it is to be designed and fabricated forlife time under specified conditions.5.0 SALIENT FEATURESSR.No. DescriptionParameter5.1 This specification covers design, manufacture, supply, erection and commissioning requirements of loaders for use in coal faces for thepurposes of loading coal. The machines will be required to work in underground coal faces to scoop and load run of mine coal.5.2 You will supply Eimco Elecon Make Model 811 Low height LHD that has the approval of Directorate General of Mines Safety, Dhanbad,6.0 SAFETY India. FEATURESSR.No. DescriptionParameterThe machine shall be fitted with effective service brake and parking brake (one of them fail safe), which will allow the machine to stand in a6.1gradient of 1 in 6 and cross gradient of 1 in 10 (without rolling down).(a) The machine can be started by operator from machine itself keeping gate end box at far end.6.2(b) Hose fail check valves on lift ram and roll back rams.(a) Pilot operation (Hydraulically operated pilot circuit operation to be used in rear end operated machines.).(b) All the hydraulic loop/loops shall be provided with high pressure line filters of suitable capacity and 10 microns (constant) equipped withcolour indicators to indicate the cleanliness of the filter element as given below :-(i) Filter element in good condition(ii) Filter element dirty and needs replacements.6.3(iii) Filter element too dirty and the filter by passed.(c) Suction strainers of 40 mesh shall be provided. The capacity should not be less than two times of pump discharge. The strainers shallbe easily accessible with minimum handling of hydraulic fluid to facilitate regular cleaning of the strainers.(d) In addition to the above, a tank mounted replaceable filter of 25 micron, 650 LPm shall be provided on the return line with by passarrangement.Low fluid level cut off and high fluid temperature cut off switch, having adjustable limit between 65 to 75 deg. Cent, should be provided andfitted. The design of equipment and cooling system shall be such that fluid temperature does not exceed permissible limits under6.4continuous operation at full load on above mentioned environment.The cut off switch shall operate at 65 degree centigrade.The machine should be fitted with suitable light at the front and back to ensure good visibility. The lighting arrangement should be suitable6.5to work at 12 volt/24 volt and all fittings used should be FLP duly approved by DGMS.The machine shall be fitted with suitable audio-visual alarm operative when the machine is put to travel in forward/reverse direction. AVA6.6shall be duly approved by DGMS.The hydraulic hoses and hose assemblies used on the machine shall be in accordance with DGMS circular No.1 of 1996 dated 31.1.19966.7and shall be approved by DGMS for use in underground coal mines.6.8 The hydraulic fluid used for the machine shall be non toxic, Fire Resistant, invert emulsions type, HF-B 68 grade,conforming to IS:10532 (Part-2)-1983 duly approved by DGMS for use in underground coal mines.However, the machine shall also be suitable for use with Organic Esters type, HFDU grade D68 fluid.6.9 Machine must have canopy for operator.6.10 Self sealing hydraulic oil filling arrangement to prevent ingress of dirt should be provided.6.11 Limit switch for cable reeler.6.12 Indicators for(a) Pressure gauge with selector,(b) Temperature indicator,(c) Fluid level indicators.7.0 LIFE TIME SPARES PARTSSR.No. DescriptionParameterThe supplier undertakes and guarantees to produce and maintain stock to be available for purchase by the purchaser under separate7.1 agreement of all spare parts and consumables as may be required for maintenance and repair of the plant/equipment through-out its lifeminimum 06 years or stipulated 21500 working hours whichever is later8.0 AVAILABILITYSR.No. DescriptionParameterThe supplier shall ensure that availability of the machine over a period of 12 months does not fall below 75%. For every 1% fall in the %availability below 75%, 1% of the value of the machine will be deducted. In case the fall in availability below 75% exceeds 10% the8.1equipment will be rejected out right and the supplier will have to refund the full amount. Calculation of %availability. :- 8760 – (Maint. Hrs + breakdown hrs )% Availability = ----------------------------------------------------------------- x 1008760
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Under Jurisdiction of Nagpur Court only WESTERN COALFIELDS ...

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