Isuzu NPR

Power steering fluid capacity & service interval

Isuzu NPR uses power steering fluid with a capacity range of 0,5 to 1,6 liters. Service intervals include checking every 10000 km or 6 to 18 months and changing every 40000 km or 24 months. The data covers 12 configurations.

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

TypeSpecifications
NPR 62 (1998-2007)
  • Use: Normal
  • Capacity 1,6 liter
  • Check 10000 km/ 6 months
  • Change 40000 km/ 24 months
NPR 62 (1998-2007)
  • Use: Normal
  • Capacity 1 liter
  • Check 10000 km/ 18 months
NPR 58 (1996-2007)
  • Use: Normal
  • Capacity 1,6 liter
  • Check 10000 km/ 6 months
  • Change 40000 km/ 24 months
NPR 58 (1996-2007)
  • Use: Normal
  • Capacity 0,5 liter
  • Check 10000 km/ 18 months
NPR 59 (1996-2007)
  • Use: Normal
  • Capacity 1,6 liter
  • Check 10000 km/ 6 months
  • Change 40000 km/ 24 months
NPR 59 (1996-2007)
  • Use: Normal
  • Capacity 1 liter
  • Check 10000 km/ 18 months
NPR 65 (1996-2007)
  • Use: Normal
  • Capacity 1,6 liter
  • Check 10000 km/ 6 months
  • Change 40000 km/ 24 months
NPR 65 (1996-2007)
  • Use: Normal
  • Capacity 1 liter
  • Check 10000 km/ 18 months
NPR 66 (1996-2007)
  • Use: Normal
  • Capacity 1,6 liter
  • Check 10000 km/ 6 months
  • Change 40000 km/ 24 months
NPR 66 (1996-2007)
  • Use: Normal
  • Capacity 1 liter
  • Check 10000 km/ 18 months
NPR 69 (1996-2007)
  • Use: Normal
  • Capacity 1,6 liter
  • Check 10000 km/ 6 months
  • Change 40000 km/ 24 months
NPR 69 (1996-2007)
  • Use: Normal
  • Capacity 1 liter
  • Check 10000 km/ 18 months

Additional Notes

  • The Isuzu NPR power steering system holds 1.6 liters across all variants covered in the 1996-2007 specifications, including the NPR 58, 59, 62, 65, 66, and 69. A 1.6-liter capacity is typical of a hydraulic power steering reservoir and circuit fill, representing the total fluid volume held within the pump reservoir and associated lines rather than a full system overhaul quantity.
  • The NPR 58 steering box carries a capacity of 0.5 liters, which is notably smaller than the 1-liter steering box capacity listed for the NPR 59, 62, 65, 66, and 69 variants. This difference indicates a physically smaller gearbox unit in the NPR 58 configuration.
  • Power steering fluid checks across all NPR variants are scheduled at every 10,000 km or 6 months under normal use conditions. The relatively short time interval of 6 months alongside the distance interval reflects the importance of monitoring hydraulic fluid condition and level in a commercial truck application.
  • The power steering fluid change interval for all listed NPR variants is 40,000 km or 24 months under normal use conditions. At four times the check interval distance, the change schedule allows for multiple inspections before a full fluid replacement is required.
  • Steering box fluid checks are scheduled at 10,000 km or 18 months for all NPR variants in the specifications. The 18-month time interval is three times longer than the 6-month interval applied to the power steering reservoir checks, reflecting the more sealed and stable nature of a recirculating-ball steering gearbox compared to an open hydraulic circuit.
  • No fluid change interval is listed for the steering box on any NPR variant, only a check interval. The steering box fluid schedule is therefore limited to periodic inspection at 10,000 km or 18 months under normal use conditions.
  • The NPR 62 has a starting model year of 1998, while the NPR 58, 59, 65, 66, and 69 all begin in 1996. Despite the later introduction of the NPR 62, the power steering and steering box capacities and service intervals for the NPR 62 align with those of the 1-liter steering box variants introduced two years earlier.

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