JCB Fastrac 125 Series

Coolant capacity & service interval

JCB Fastrac 125 Series coolant capacity ranges from 28 to 34 liters. Service intervals include checks every 10 hours and changes every 2000 hours or 24 months. The data covers 2 configurations.

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

TypeSpecifications
Fastrac 125, -> 636.000 (1991-1997)
  • Use: Normal
  • Capacity 28 liter
  • Check 10 hours
  • Change 2000 hours/ 24 months
Fastrac 125, 636.001-> (1991-1997)
  • Use: Normal
  • Capacity 34 liter
  • Check 10 hours
  • Change 2000 hours/ 24 months

Additional Notes

  • The JCB Fastrac 125 Series cooling system capacity differs by serial number range. Units up to serial number 636.000 hold 28 liters, while units from serial number 636.001 onward hold 34 liters, a difference of 6 liters between the two configurations.
  • The 34-liter figure for the later serial number range represents a notably large coolant volume, consistent with a heavy-duty agricultural tractor cooling system designed to manage sustained thermal loads across extended field operations.
  • Both serial number ranges share an identical check interval of every 10 hours under normal use conditions, reflecting how frequently coolant level and condition are expected to be verified during active service.
  • The change interval for both configurations under normal use is 2000 hours or 24 months, whichever comes first. The dual-trigger structure means time elapsed can mandate a change even when the hour threshold has not been reached, and vice versa.
  • A 2000-hour drain interval is a relatively extended service cycle for a coolant system, indicating the specified fluid is formulated to maintain protective properties across long operational periods typical of agricultural machinery.

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