The Massey Ferguson 399 tractor battery spec found is 12 V with Group 31 battery sizing.
Voltage12 V
Group size31
Massey Ferguson 399 Battery Size Details
Replacement battery recommendation
12 V, Group 31
Battery voltage
12 V
Battery group size
31
Massey Ferguson 399 Extra Battery Notes
Replacement note
For the Massey Ferguson 399, match the replacement battery to the captured spec: 12 V, Group 31. Physical fit, terminal layout and hold-down fit still matter
Battery location
The battery on the Massey Ferguson 399 tractor is typically located near the engine or underneath the seat. For specific details, it’s best to consult the tractor’s service manual or manufacturer’s guidelines
Safe removal note
Disconnect the negative cable first, then disconnect the positive cable. Install the new battery, connect the positive cable first, then reconnect the negative cable last. That reduces the chance of shorting a tool against the frame
Official information note
Mistakes do happen. Battery specs can change by year, engine, market, terminal layout and installed options. Check the old battery label, operator manual, parts book and official masseyferguson.com website before ordering a replacement battery.
