Mini Combine Harvester Maintenance

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This is an essential and practically oriented lesson about mini combine harvester use in paddy fields by M.M.Palitha Mahinda Munasinghe, Sri Lanka

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M.M.Palitha Mahinda Munasinghe Farm Mechanical Instructor palithamahinda@yahoo.com Mini Combine Harvester Maintenance

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25/09/2010 mmpmm 2 A. Light weight, low ground pressure and reliable paddy field moving B. Stable quality for special harvester gearbox C. Combination of fan and sieve system, and twice grain cleaning device C. Easy to make maintenance with outer assembling D. Convenient to operate with control system and comfortable driver's seat D. Suitable for small field of hilly land, for its small turning radius and flexible operation Main Features Mini Combine Harvester

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Harvesting Capacity : 0.07 ~ 0.15 Ha./H Overall Dimensions : (L x W x H) 3770×1554×1620 mm Weight : 550 kg Engine Rated Power : 15/2200 hp/rpm Cooling System: Water Cooling Fueling Consumption : 250.2 g/kwh Rubber Wheel Tire size: 24 x 10 Rear Wheel Rubber wheel size :4.00-8 Header Cutting Width: 1300 mm Header Feeding Capacity: 0.6 kg/s Type of Lifting Hydraulic Cleaning Sieving + Suction Total Loss: ≤3.0% Breakage : ≤1.0% Impurity: ≤7% Mini Combine Harvester 25/09/2010 mmpmm 3

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Complete Threshing, Transport, In Casement, Straw Crushing At One Time Mini Combine Harvester 25/09/2010 mmpmm 4

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Combine Harvester -A 25/09/2010 mmpmm 5

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Engine : 88 Hp / 2800rpm Cutter Bar Width: 2300 mm Height-adjustment: Hydraulically Reel Type Pick up Speed adjustment: Mechanically Height adjustment: Hydraulically Thresher Drum: 600 mm Ø Length: 765mm Speed: 600 to 950 Adjustment: Mechanically No. of spikes: 90 No. of straw walker : 4 Cleaning Area: 710 x 1850 mm Type: Forced air cleaning Adjustment: Mechanically Transmission: Fully hydro static controlled Independently by two levers Speed :0-10 km/hr DimensionsLength:6300 mmHeight:3250 mmWidth:2350 mm Combine Harvester Specification- A 25/09/2010 mmpmm 6

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Sketch of Combine Harvester 25/09/2010 mmpmm 7

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1. Dual Threshing Cylinder system, more clean and less breakage 2. One-Lever controlling steering and lifting of cutter bar, easy operation 3. Manual gear transmission and HST auto gear transmission are both available for your choice Combine Harvester-B (Auto Transmission) 25/09/2010 mmpmm 8

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Harvesting Capacity : 0.2 ~ 0.4 Ha./H Overall Dimensions (L x W x H) : 4760×2080×2580 mm Weight : 2380 kg Engine: 4-cylinder diesel engine Rated Power: 55 hp (40kw) / 2600 rpm Rubber Track (width x pitch): 350 x 90 mm No. of Spikes: 46 Transmission: HST Auto Transmission Ground Pressure: ≤24 kpa Min. Ground Clearance: 250 mm Total Loss : Rice≤3% Wheat≤1.5% Breakage: ≤2.0% Impurity: ≤2.0% Combine Harvester Specification-B 25/09/2010 mmpmm 9

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Auto Combine Harvester - C 25/09/2010 mmpmm 10

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Combine Harvester Specification - C Dimension (Length x Width x Height) : 4400x2300x2700 mm Weight : 2300kg Working efficiency : 0.26~0.53 ha/h Cutter bar length: 2200mm Engine Power: 60/2400 hp/rpm Travelling system Crawler specification Rubber Track: 400x90x46 / 400x90x48 Ground pressure: 21 kpa Ground clearance: 260mm Transmission: Hydraulic Step less System Threshing cylinder Type : Axial flow, Spike tooth Diameter& length: 550mmx1285mm Cleaning system: Chaffer sieve + front blowing and rear suction fan Working speed: 0.5~1.2 m/s Grain tank capacity: 0.85cumeter Grain unloading method Discharge auger or Bags Total loss: (%) Rice<3 Breakage rate: (%) Rice<1.5 Impurity rate: (%) <2 25/09/2010 mmpmm 11

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Shears The knife The knife guard Wear plates Hold-down clips Starting with the platform 25/09/2010 mmpmm 12

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Auger fingers and finger bearings Finger guides Rotary and Stationery Knives 25/09/2010 mmpmm 13 Starting with the platform Cont.

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25/09/2010 mmpmm 14 Gatherer belt Feed accelerator Rasp bar Threshing elements Starting with the platform Cont.

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25/09/2010 mmpmm 15 Tractor Operated Combine Harvester - D

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The importance of replacing worn components Keeping harvester operating at its full potential Feeding, threshing, and separating performance is reduced Poor combine performance Reducing profits Will reduce loss and increase profits (up to 80 percent of crop loss can occur at the platform or header area) 25/09/2010 mmpmm 16

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Poor feeding of material to the threshing area Can cause plugging Cylinder drive component failure Incomplete threshing Worn threshing components Incomplete threshing Worn augers and elevator paddles Reduced combine productivity The importance of replacing worn components 25/09/2010 mmpmm 17

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Garage area Small Washing Plant Workshop bench Appropriate tools Battery charger Minimum storage of Fuel ,oil and Grease Required Facilities Maintenance 25/09/2010 mmpmm 18

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