Changing Transmission/Hydraulic Oil (Tractors NOT Equipped with AutoPowr)6820, 6920 and 6920S tractors1. Start engine and operate several hydraulic functions to heat up oil. 2. Park tractor so that it is level. Lower draft links and front-mounted implements. 3. Stop the engine and remove the key. 4. Apply handbrake (transmission in neutral). 5. Remove drain screws (A). 6. Change transmission/hydraulic oil filters. See "Service / Every 750 Hours". 7. Pull out intake screen and wash it in fuel (see below). 8. Before refilling with fresh oil, reinstall intake screen, replace seals and tighten drain screws to 50 N·m (35 lb-ft). 9. Add transmission/hydraulic oil to the transmission case.
Run engine briefly and operate hydraulic functions. Shut off the engine. Wait for between 10 and 15 minutes before checking the oil level. It should be between the marks on the sight-glass. If not, correct oil level. |
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Cleaning the intake screen
As soon as you have drained the transmission/hydraulic oil, remove oil line (A) at the front left of the differential housing. Take out the intake screen, wash it in fuel and then clean it with compressed air. Re-insert the screen, and re-install the seal, O-ring and oil line. |
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Additional work on tractors with hydraulic trailer brakes
1. Disconnect hydraulic line (A) from fitting (B). 2. Loosen fitting (B) and turn it to one side. 3. Remove screen (C) from hydraulic line (A) and wash it in fuel. 4. Insert screen (C) and attach hydraulic line (A). 5. Tighten hydraulic line (A) and fitting (B). |
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