A clear, high-quality diagram saves you time, money, and frustration. Do not guess at gear positions or oil passages. Find the OEM schematic, trace the lines with your finger, and understand the machine. Your 4020 will reward you with thousands more hours of loyal service.
| | Part Name | Function | | :--- | :--- | :--- | | 1 | Synchronizer Assembly | Matches gear speeds before engaging | | 2 | Shift Collar (1st/2nd) | Slides to engage gear sets | | 3 | Shift Collar (3rd/4th) | Slides for upper gears | | 4 | Reverse Idler Gear | Reverses output direction | | 5 | Detent Spring & Ball | Holds shift lever in position | | 6 | Shift Fork | Moves collars (connected to top cover) | John Deere 4020 Transmission Diagram
Instead of gears, diagrams for the Power Shift focus on a series of hydraulic clutch plates (labeled C1, C2, B1, B2, B3, and B4). A clear, high-quality diagram saves you time, money,
Uses a dry-type clutch. A critical maintenance point is the split-tractor repair required when the main or PTO clutch fails. Power Shift Transmission Diagram Analysis Your 4020 will reward you with thousands more
(online) – Enter model "4020" → select transmission section (Key 21, 25, 30 depending on Syncro-Range or Power Shift).