

The John Deere Forage Harvester 7800 is a high-performance agricultural machine designed for efficient forage harvesting. Known for its reliability and advanced features, this model ensures optimal productivity in the field, making it a preferred choice among farmers and agricultural professionals.
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Tensioning Guide
Belt-diagram
C-120 pulleys
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Pre-built workflows to keep your asset running smoothly.
Daily Electrical System Inspection
Replace Roller and Pulley
Install Engine B-120
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Applied Industrial Technologies
Electrical Brothers
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Drive Motor
B2 Rollers
Tensioning System
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John Deere Forage Harvesters 7800
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500 Hourly Maintenance
Includes all work shown under "Every 10 Operating Hours"
Drain hydraulic oil from oil reservoir and refill system with fresh oil
Change hydraulic oil filter-3-Speed transmission
Change transmission and hydraulic oil filters-ProDrive transmission
Change hydrostatic oil filter
Change grease of gear transmission (feed rolls). Thoroughly clean inside of gear transmission prior to refilling
Change IVLOC intake and return filter
Clean mechanical fuel transfer pump
Replace coolant conditioner filter
Initial 100 Hours Maintenance
Perform daily or 10 hour service (refer to this Section and to "Fuel, Lubricants and Capacities")
Avoid unnecessary engine idling.
Watch coolant temperature closely.
Check engine oil level
Check coolant level
Watch for any sign of leaks.
If engine oil must be added during break-in, use seasonal viscosity grade oil, meeting specifications given in "Fuel, Lubricants and Capacities" Section.
Check engine air intake system hoses and hose clamps for tightness.
Check drive belts for proper tension and adjust, if necessary.
250 Hourly Maintenance
Includes all work shown under 'Every 10 Operating Hours'.
Tighten rear wheel attaching bolts to 260 N.m (185 lb-ft)-Standard axle.
Tighten rear wheel attaching bolts to 550 N.m (400 lb-ft)-Heavy duty and powered axle.
Tighten steering cylinder attaching screws to 240 N-m (170 lb-ft).
Change fuel filter element.
Drain engine oil and fill crankcase with fresh oil.
Change engine oil filter.
Check specific gravity of battery electrolyte.
Charge battery and/or top up with distilled water, if necessary.
Daily Maintenance
Drain fuel-water separator
Check and correct engine oil level
Check and correct coolant level
Inspect cooling fan
Inspect drive belts
Inspect intake air piping and intercooler
Check crankcase breather tube
1000 Hourly Maintenance
Change oil of length-of-cut transmission
Change oil of 3-speed or ProDrive transmission
Change oil of final drives
Change oil of differential - powered rear axle
Change oil of reduction gears - powered rear axle
Have John Deere engine valve clearance checked and, if necessary, adjusted by your John Deere dealer in every 2000 hours
Check the fan hub in every 10000 hours
Sign off on the 1000 Hourly Maintenance
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