John Deere Combines S790

Clean/Replace Recirculating Filter

Clean/Replace Cab Fresh Air Filter

Fill Windshield Washer Reservoir

Clean Moisture Sensor (If Equipped)

Clean Moisture Sensor Bypass Auger

1. Shut off engine, set park brake, and remove key.

2. Remove pins (A) and end cap (B).

3. Remove auger (C) from the moisture sensor bypass.

Change Feeder House Reverser Gear Case Oil

Feeder house raised and safety stop lowered

Oil drained at plug (A), plug wiped clean

Oil refilled at dipstick opening (B)

Oil level checked with the feeder house raised up

Sign off on the 800 Hourly Replacement

Drain, Flush, and Refill Engine Cooling System

Open drain (A) to remove coolant from the radiator.

Flush and refill surge tank (B) with correct coolant and conditioner.

See Maintenance—As Required (Engine Fluids and Filters) section for further information. See Fuels and Lubricants section for coolant recommendations.

Check engine coolant level in the surge tank with engine cold. Level must be up to the "Max Cold" line.

Sign off on the maintenance procedure

Change Engine Oil and Filter (Tier 2/Stage II)

Style A: Engine Crankcase Top Load Oil Filter: Remove cap (A) and remove filter. Replace filter and install cap. Tighten to specification.

Style B: Engine Crankcase Oil Filter: Remove and replace oil filter (B).

Style A: Engine Crankcase Top Load Oil Filter Remove dipstick (D) to fill and check oil level after filling.

Style B: Engine Crankcase Oil Filter: Remove cap (E) to fill and check oil with dipstick (F) after filling.

Change Engine Oil and Filter (Final Tier 4/Stage V)

Style A: Engine Crankcase Top Load Oil Filter: Remove cap (A) and remove filter. Replace filter and install cap. Tighten to specification.

Style B: Engine Crankcase Oil Filter: Remove and replace oil filter (B).

Replace Diesel Exhaust Fluid (DEF) Dosing Unit Filter (Final Tier 4/Stage V S760 and S770 Machines)

Clear all debris from area around the DEF dosing unit

Remove and discard the equalizing element (B)

Insert “Black” end of the filter tool (C) into the DEF dosing unit filter (D) until a CLICK is felt or heard, indicating that the filter tool is fully engaged

Pull filter tool and DEF dosing unit filter from the DEF dosing unit. Discard DEF dosing unit filter and filter tool

Clean DEF dosing unit threads and mating surfaces with distilled water

Lubricate DEF filter O-rings with clean DEF. Carefully insert DEF dosing unit filter into the DEF dosing unit

Install new DEF dosing unit filter equalizing element into the DEF dosing unit filter