- Integrated Toolcarrier:
- IT28G (S/N: DBT1-UP; WAC1-UP)
- Wheel Loader:
- 924G (S/N: DDA1-UP; RBB1-UP; WMB1-UP)
- 924GZ (S/N: WGX1-UP; RTA1-UP; DFZ1-UP)
- 928G (S/N: DJD1-UP; WLG1-UP)
- 930G (S/N: TFW1-UP; TWR1-UP)
Certain Small Wheel Loaders have had issues that involve dead batteries.
Note: There are two reasons for battery discharge: Current Draw and Self-Discharge.
Current Draw
The electrical system has a current draw of approximately 35 milliampere when the machine is not being used. The batteries can discharge over a period of 4 to 5 weeks with enough discharge that may prevent the machine from starting. The master disconnect switch must be opened when the machine is not being used for extended periods in order to help reduce battery discharge.
- A battery with a 100% State of Charge measures 12.60 Volts.
- A battery with a 50% State of Charge only measures 12.20 Volts.
Self-Discharge
The table below shows the estimated rate of self-discharge of a battery at various temperatures.
| Estimated Discharge Rate of a Battery at Various Temperatures | ||||||||
54.4 °C (130 °F) |
43.3 °C (110 °F) |
32.2 °C (90 °F) |
21.1 °C (70 °F) |
|||||
| SOC (1) | Days | Days | Days | Days | ||||
| 75% | 25 | 31.3 | 50 | 166.7 | ||||
| 50% | 50 | 62.5 | 100 | 333.3 | ||||
| 25% | 75 | 93.8 | 150 | 500 | ||||
| 0% | 100 | 140.6 | 225 | 750 | ||||
| ( 1 ) | State Of Charge |
Note: The inside temperature of an enclosed battery compartment can easily reach 11.1 °C (20 °F) above ambient air temperature.
Note: Park the machine in an area that will avoid direct sunlight on the battery compartment in order to help to reduce naturally occurring battery discharge.
- The battery may take 166 days to discharge to 75% at 21.1 °C (70 °F). Reference table 1.
- The battery may take only 31 days to discharge to 75% at 43.3 °C (110 °F). Reference table 1.
Periodic recharging of the battery is necessary even if the disconnect switch is in the open position. Recharging of the battery is especially necessary in warm climates in order to maintain proper battery voltage. Proper battery voltage will ensure that the machine engine starts.
Refer to Special Instruction, SEHS7633, "Battery Test Procedure".