Ursus Bison

Coolant capacity & service interval

Ursus Bison coolant capacity ranges from 13 to 25 liters. The service interval for coolant is 24 months. The data covers 6 configurations.

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

TypeSpecifications
Bison 105-65 (2WD+4WD) (1984- )
  • Use: Normal
  • Capacity 23 liter
  • Change 24 months
Bison 120-85 (2WD+4WD) (1984- )
  • Use: Normal
  • Capacity 25 liter
  • Change 24 months
Bison 145-100 (2WD+4WD) (1984- )
  • Use: Normal
  • Capacity 25 liter
  • Change 24 months
Bison 160-110 (2WD+4WD) (1984- )
  • Use: Normal
  • Capacity 25 liter
  • Change 24 months
Bison 60-35 2WD (1984- )
  • Use: Normal
  • Capacity 13 liter
  • Change 24 months
Bison 85-50 (2WD+4WD) (1984- )
  • Use: Normal
  • Capacity 23 liter
  • Change 24 months

Additional Notes

  • The Ursus Bison 60-35 2WD carries the smallest cooling system capacity across the lineup at 13 liters, roughly half the volume found in the mid-range and larger variants. A smaller capacity like this is typical of a lower-displacement engine with a less extensive cooling circuit.
  • The Bison 85-50 and Bison 105-65 share a 23-liter cooling system capacity despite representing different power outputs. In agricultural tractors, identical coolant volumes across different power ratings can reflect shared engine block architecture or cooling circuit designs carried over between variants.
  • The Bison 120-85, Bison 145-100, and Bison 160-110 all specify a 25-liter cooling system capacity. Across three distinct power ratings, a uniform capacity suggests a common engine family or shared radiator and circuit configuration used throughout the upper tier of the Bison range.
  • All six Bison configurations, spanning the 60-35 through 160-110 variants, share a 24-month coolant change interval under normal use conditions. A two-year service cycle is a standard interval for conventional coolant formulations in heavy-duty agricultural equipment.
  • The 2WD and 4WD versions of the Bison 105-65, 120-85, 145-100, 160-110, and 85-50 carry identical coolant capacities within each model pairing. Drivetrain configuration does not affect the cooling system volume, as the addition of front-axle drive components does not alter the engine cooling circuit.
  • The Bison 60-35 is listed exclusively as a 2WD variant, while all other Bison models in the specifications cover both 2WD and 4WD configurations. The 60-35 designation also corresponds to the lowest power rating in the range, which aligns with its notably smaller 13-liter coolant capacity relative to the other models.

Other Systems