Toro Groundsmaster 4300-D Service Manual page 323

Charging the Battery (continued)
Groundsmaster ® 4300-D
16226SL Rev C
Note: The battery is fully charged when the cells are gassing freely at a
low charging rate and there is less than a 0.003 change in specific gravity
for 3 consecutive readings.
Page 5–99 Electrical System: Service and Repairs