Solis/Sonalika (ITL) Tractors Sonalika

Coolant capacity & service interval

Solis/Sonalika (ITL) Tractors Sonalika coolant capacity ranges from 2,5 to 10,5 liters. Service intervals include checks at 10 hours and changes at 24 months, 750 hours, or 1500 hours. The data covers 6 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
26, Mitsubishi S3L2
  • Use: Normal
  • Capacity 2,5 liter
  • Check 10 hours
  • Change 24 months
75N, ITL 4100 ELT
  • Use: Normal
  • Capacity 10,5 liter
  • Check 10 hours
  • Change 1500 hours
DI-90, ITL 4105 FLT
  • Use: Normal
  • Capacity 10,5 liter
  • Check 10 hours
  • Change 750 hours
Gardentrac 20, Mitsubishi L3E
  • Use: Normal
  • Capacity 2,5 liter
  • Check 10 hours
  • Change 24 months
WT-75, ITL 4100 FLT
  • Use: Normal
  • Capacity 10,5 liter
  • Check 10 hours
  • Change 750 hours
WT-90, ITL 4105 FLT
  • Use: Normal
  • Capacity 10,5 liter
  • Check 10 hours
  • Change 750 hours

Additional Notes

  • The Sonalika 26 with the Mitsubishi S3L2 engine and the Gardentrac 20 with the Mitsubishi L3E engine both share a 2.5-liter cooling system capacity, which is notably smaller than the 10.5-liter capacity found in the larger ITL-engined models. The compact volume reflects the smaller displacement of the Mitsubishi three-cylinder engines used in these lighter tractors.
  • Coolant change intervals for the Mitsubishi-engined models are expressed in calendar time rather than operating hours, with a 24-month change interval specified for both the S3L2 and L3E variants. A time-based interval is typically applied when equipment may accumulate hours slowly or irregularly, making elapsed time a more practical measure of coolant degradation.
  • The ITL 4100 ELT engine in the 75N carries a 1500-hour coolant change interval, which is double the 750-hour interval specified for the ITL 4100 FLT in the WT-75. Both engines share the same 10.5-liter cooling system capacity, making the difference in service interval a function of engine variant rather than system volume.
  • The DI-90 with the ITL 4105 FLT engine and the WT-90 with the same ITL 4105 FLT engine both carry identical cooling system specifications: a 10.5-liter capacity, a 10-hour check interval, and a 750-hour change interval. Shared specifications across different model designations using the same engine are consistent with a common cooling circuit design.
  • A 10-hour check interval is uniform across all six configurations listed. In service schedules, a check interval at this frequency typically involves inspecting coolant level and condition rather than performing a full drain and refill, and is standard practice for liquid-cooled engines in agricultural equipment operating in dusty or thermally demanding environments.
  • The 10.5-liter cooling system capacity shared by the 75N, DI-90, WT-75, and WT-90 models indicates a full-system service fill volume. In larger tractor engines, this figure accounts for the radiator, engine block passages, and associated hoses, and is the volume required when refilling after a complete drain rather than a partial top-up.

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