Austin Allegro, ADO67

Clutch fluid capacity & service interval

Austin Allegro, ADO67 models require clutch fluid with a capacity range between min and max. Service intervals include checking every 5000 km or 3 months and changing every 30000 km or 18 months. The data covers 8 configurations.

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

TypeSpecifications
1750 (1974-1983)
  • Use: Normal
  • Between min and max.
  • Check 5000 km/ 3 months
  • Change 30000 km/ 18 months
1100 (1973-1983)
  • Use: Normal
  • Between min and max.
  • Check 5000 km/ 3 months
  • Change 30000 km/ 18 months
1300 (1973-1983)
  • Use: Normal
  • Between min and max.
  • Check 5000 km/ 3 months
  • Change 30000 km/ 18 months
1300 Automatic (1973-1983)
  • Use: Normal
  • Between min and max.
  • Check 5000 km/ 3 months
  • Change 30000 km/ 18 months
1500 (1973-1983)
  • Use: Normal
  • Between min and max.
  • Check 5000 km/ 3 months
  • Change 30000 km/ 18 months
1500 Automatic (1973-1983)
  • Use: Normal
  • Between min and max.
  • Check 5000 km/ 3 months
  • Change 30000 km/ 18 months
1750 (1973-1974)
  • Use: Normal
  • Between min and max.
  • Check 5000 km/ 3 months
  • Change 30000 km/ 18 months
1750 Automatic (1973-1974)
  • Use: Normal
  • Between min and max.
  • Check 5000 km/ 3 months
  • Change 30000 km/ 18 months

Additional Notes

  • The Austin Allegro ADO67 clutch fluid capacity is expressed as a level range rather than a fixed volume, meaning the reservoir must be kept between the minimum and maximum marks rather than filled to a precise measured quantity.
  • A hydraulic clutch system uses fluid pressure to disengage the clutch, placing the reservoir and lines under similar maintenance demands as a brake hydraulic circuit, which explains the relatively frequent check interval of every 5,000 km or 3 months under normal use conditions.
  • The fluid change interval of 30,000 km or 18 months under normal use conditions applies uniformly across all engine variants in the Allegro range, from the 1100 through to the 1750.
  • The 1300 Automatic and 1500 Automatic variants retain a hydraulic clutch system specification despite carrying automatic transmissions, indicating a separate clutch mechanism distinct from the transmission's own fluid circuit.
  • The 1750 engine appears across two separate row entries covering 1973-1974 and 1974-1983, with both sharing identical clutch fluid service specifications, suggesting the split reflects a production or variant distinction rather than any change in fluid requirements.
  • The time-based check interval of 3 months runs considerably shorter in calendar terms than the 18-month change interval, reflecting that level monitoring is a routine task while full fluid replacement addresses long-term fluid degradation.
  • Hydraulic clutch fluid is hygroscopic, meaning it absorbs moisture over time, which is the underlying reason a calendar-based change interval of 18 months accompanies the distance-based 30,000 km interval regardless of which threshold is reached first.

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