John Deere — Servicing Battery
Maintenance
From a John Deere owner's manual covering: 4045TF120, 6068HF158, 6068TF120, 6068TF250. Check it applies to your exact model before use.
Applies to: John Deere 4045TF120, John Deere 6068TF120, John Deere 6068TF250
Before you start
- Battery gas can explode. Keep sparks and flames away from batteries. Use a flashlight to check battery electrolyte level.
- Sulfuric acid in battery electrolyte is poisonous.
Procedure
- On regular batteries, check electrolyte level. Fill each cell to bottom of filler neck with distilled water.
- Keep batteries clean by wiping with a damp cloth. Keep all connections clean and tight.
- Remove corrosion and wash terminals with a solution of 1 part baking soda and 4 parts water.
- Coat battery terminals and connectors with a mixture of petroleum jelly and baking soda to retard corrosion.
- Keep battery fully charged, especially during cold weather.
- Turn charger off before connecting charger to battery(ies). Attach POSITIVE (+) charger lead to POSITIVE (+) post, then NEGATIVE (–) lead to a good ground.
Tools required
- Voltmeter or hydrometer Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 12 Volt Standard Duty Starter—Cold Cranking Amps 640
- 12 Volt Heavy Duty Starter—Cold Cranking Amps 800
- 24 Volt Standard Duty Starter—Cold Cranking Amps 570
Full service-parts list: John Deere 6068TF250 →
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.