JCB Fastrac 1000 Series

Differential fluid capacity & service interval

JCB Fastrac 1000 Series differential fluid capacity ranges from 7 to 23 liters. Service intervals include checks every 250 hours and changes every 1000 hours or 12 months. The data covers 11 configurations.

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

TypeSpecifications
  • Fastrac 1115 (1994-1998)
  • Front
  • Use: Normal
  • Capacity 7 liter
  • Check 250 hours
  • Change 1000 hours/ 12 months
  • Fastrac 1115 (1994-1998)
  • Rear
  • Use: Normal
  • Capacity 23 liter
  • Check 250 hours
  • Change 1000 hours/ 12 months
  • Fastrac 1115S (1994-1998)
  • Front
  • Use: Normal
  • Capacity 7 liter
  • Check 250 hours
  • Change 1000 hours/ 12 months
  • Fastrac 1115S (1994-1998)
  • Rear
  • Use: Normal
  • Capacity 23 liter
  • Check 250 hours
  • Change 1000 hours/ 12 months
  • Code: 2WS
  • Fastrac 1115S (1994-1998)
  • Rear
  • Use: Normal
  • Capacity 17 liter
  • Check 250 hours
  • Change 1000 hours/ 12 months
  • Code: 4WS
  • Fastrac 1125 (1994-1998)
  • Front
  • Use: Normal
  • Capacity 7 liter
  • Check 250 hours
  • Change 1000 hours/ 12 months
  • Fastrac 1125 (1994-1998)
  • Rear
  • Use: Normal
  • Capacity 23 liter
  • Check 250 hours
  • Change 1000 hours/ 12 months
  • Code: 2WS
  • Fastrac 1125 (1994-1998)
  • Rear
  • Use: Normal
  • Capacity 17 liter
  • Check 250 hours
  • Change 1000 hours/ 12 months
  • Code: 4WS
  • Fastrac 1135 (1994-1998)
  • Front
  • Use: Normal
  • Capacity 7 liter
  • Check 250 hours
  • Change 1000 hours/ 12 months
  • Fastrac 1135 (1994-1998)
  • Rear
  • Use: Normal
  • Capacity 23 liter
  • Check 250 hours
  • Change 1000 hours/ 12 months
  • Code: 2WS
  • Fastrac 1135 (1994-1998)
  • Rear
  • Use: Normal
  • Capacity 17 liter
  • Check 250 hours
  • Change 1000 hours/ 12 months
  • Code: 4WS

Additional Notes

  • The front differential capacity across the JCB Fastrac 1000 Series — covering the 1115, 1115S, 1125, and 1135 variants from 1994-1998 — is uniformly specified at 7 liters, indicating a consistent front axle design shared across all four models in the lineup.
  • The rear differential on the Fastrac 1115 carries a single specified capacity of 23 liters, while the 1115S, 1125, and 1135 each list two separate rear differential capacities: 23 liters and 17 liters, suggesting those three models accommodate different rear axle configurations.
  • A 23-liter rear differential fill is a substantial fluid volume, reflecting the scale of the rear axle assembly on agricultural tractors of the Fastrac class, where the differential housing often integrates with other drivetrain components and requires a correspondingly large fluid charge.
  • The 17-liter rear differential capacity listed for the 1115S, 1125, and 1135 represents a notably smaller fill than the 23-liter figure, pointing to a physically distinct rear differential unit rather than a partial fill variation of the same housing.
  • All differential positions across every model in the 1994-1998 Fastrac 1000 Series share an identical check interval of 250 hours under normal use conditions, establishing a consistent inspection frequency regardless of axle location or fluid volume.
  • The fluid change interval for all differentials in the series is specified at 1000 hours or 12 months under normal use, whichever comes first. The dual-trigger format means calendar time can mandate a change even when hourly usage has not reached the 1000-hour threshold.
  • With front differentials holding 7 liters and rear differentials holding either 17 or 23 liters, a full differential service on a single Fastrac 1000 Series machine could involve between 24 and 30 liters of fluid in total, depending on which rear axle configuration is present.

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