This page covers the John Deere 400 garden tractor. A model name alone is not enough to select an engine part, mower component or attachment: first match the tractor’s identification record, then check the equipment fitted to that individual machine.
Build an accurate machine record
- Record the tractor’s model and serial information from its product identification plate.
- Photograph the installed engine’s data plate. A replacement engine can make a generic model-year specification misleading.
- Record the mower deck, hitch and attachment identifiers separately; verify the mounting parts as well as the implement name.
- Use the matching Deere parts catalog and operator’s manual. Ask a dealer to confirm any serial-range exception or substituted component.
John Deere’s offers model and serial lookup. Deere also provides . Use those records for capacities, maintenance intervals, fluids and attachment fit rather than estimates copied between listings.
Screen a used John Deere 400
Ask for service history and note engine, transmission, deck or attachment changes. Look over the machine for visible damage, leaks, corrosion, loose wiring, missing guards and mismatched brackets. If the seller demonstrates it, observe start-up, steering, braking and drive operation from the operator’s position, using the correct manual. Keep clear of hot or moving parts. Have a qualified technician assess unusual sounds or operation.
Related model group
Browse the John Deere 400 Series garden tractor guide for related models. Serial-specific manufacturer records remain the reference for the individual tractor.