John Deere — Using a Booster Battery or Charger
Operation · Electrical system / batteries
From a John Deere operator's manual covering: 4039, 4045, 6059, 6068, RG4697. Check it applies to your exact model before use.
Applies to: John Deere 4039, John Deere 4045, John Deere 6059, John Deere 6068
Before you start
- Gas given off by battery is explosive. Keep sparks and flames away from battery
- Before connecting or disconnecting a battery charger, turn charger off
- Always connect NEGATIVE (-) cable last and disconnect this cable first
- Be sure polarity is correct before making connections. Reversed polarity will damage electrical system
Procedure
- Connect booster battery or batteries to produce the required system voltage for your engine application.
- Connect one end of jumper cable to the POSITIVE (+) post of battery connected to the starting motor.
- Connect the other end of the jumper cable to the POSITIVE (+) post of the booster battery.
- Connect one end of the other jumper cable to the NEGATIVE (-) post of the booster battery.
- Complete the hook-up by making the last connection of the NEGATIVE (-) cable to a good ground on the engine frame and away from the battery(ies). When disconnecting, make this the first connection to
Tools required
- Heavy duty jumper cables Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Use 12-volt Amazon eBay $11.99 FridayParts $65.01 booster battery for 12-volt Amazon eBay $11.99 FridayParts $65.01 electrical systems and 24-volt SinoCMP $247.50 booster battery(ies) for 24-volt SinoCMP $247.50 electrical systems
Full service-parts list: John Deere 4039 →, John Deere 4045 →, John Deere 6068 →
Source: John Deere operator'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.