John Deere 4045 / 6068 — Adding Coolant
Maintenance · Cooling system
For the John Deere 4045 / 6068, from the John Deere owner's manual.
Applies to: John Deere 4045, John Deere 6068
Before you start
- Never pour cold liquid into a hot engine; may crack cylinder head or block.
Procedure
- Loosen temperature sending unit fitting at rear of cylinder head or plug in thermostat housing to allow air to escape.
- Fill radiator until coolant level touches bottom of radiator filler neck.
- Tighten plugs and fittings when air has been expelled from system.
- Run engine until it reaches operating temperature.
Full service-parts list: John Deere 4045 →, John Deere 6068 →
Source: John Deere owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.