The John Deere 4066M battery size is listed as Group 51, 12 V, 9.38 × 5.06 × 8.75 in.
Battery sizeGroup 51
Voltage12 V
Case size9.38 × 5.06 × 8.75 in
John Deere 4066M Battery Specs
Battery size / group
Group 51
Battery voltage
12 V
Battery dimensions
9.38 × 5.06 × 8.75 in
Battery Spec Comparisons Chart
Voltage comparison
This model
12 V
Average
11.94 V
Low
6 V
High
12 V
Case length comparison
This model
9.38 in
Average
11.57 in
Low
9.38 in
High
13 in
John Deere 4066M Battery FAQ
Replacement battery recommendation
The best replacement battery for the John Deere 4066M tractor is typically a Super Charge, Gold, 590CCA battery, which comes with a 36-month warranty. Always check compatibility with your specific model before purchasing
Battery voltage
The official battery voltage for the John Deere 4066M tractor is 12 volts
Battery group size
The official battery group size for the John Deere 4066M tractor is Group 51
Battery CCA
The recommended official John Deere 4066M tractor battery has a Cold Cranking Amps (CCA) rating of 770
Battery location
The battery on the John Deere 4066M tractor is located underneath the right access step. You may need to open the flap and possibly remove the access step to access it
Battery replacement steps
To replace the battery on a John Deere 4066M tractor, first, open the flap and remove the access step by taking out the attaching screws. Then, disconnect the battery terminals, remove the old battery, and install the new one, ensuring all connections are secure
Bad battery symptoms
Common symptoms of a failing battery in a John Deere 4066M tractor include hard starting or no response when trying to start, clicking sounds, and rapid battery drain. Additionally, corrosion on battery terminals can prevent proper electrical flow, leading to starting issues
Official information note
Mistakes do happen. Please check official deere.com website for official information.
