Marshall All models

Power steering fluid capacity & service interval

Marshall All models utilize power steering fluid with a capacity range of 0,5 to 0,6 liters. Service intervals include checking at 50 to 400 hours and changing at 1200 hours. The data covers 8 configurations.

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

TypeSpecifications
302 (1982-1985)
  • Use: Normal
  • Capacity 0,6 liter
  • Check 400 hours
502 (1982-1990)
  • Use: Normal
  • Capacity 0,5 liter
  • Check 50 hours
  • Change 1200 hours
602 (1982-1990)
  • Use: Normal
  • Capacity 0,5 liter
  • Check 50 hours
  • Change 1200 hours
604 (1982-1990)
  • Use: Normal
  • Capacity 0,5 liter
  • Check 50 hours
  • Change 1200 hours
702 (1982-1990)
  • Use: Normal
  • Capacity 0,5 liter
  • Check 50 hours
  • Change 1200 hours
704 (1982-1990)
  • Use: Normal
  • Capacity 0,5 liter
  • Check 50 hours
  • Change 1200 hours
802 (1982-1990)
  • Use: Normal
  • Capacity 0,5 liter
  • Check 50 hours
  • Change 1200 hours
804 (1982-1990)
  • Use: Normal
  • Capacity 0,5 liter
  • Check 50 hours
  • Change 1200 hours

Additional Notes

  • The Marshall 302 carries a steering box rather than a hydraulic power steering pump circuit, which accounts for the higher 0.6-liter capacity compared to the 0.5-liter figure shared by all other models in this range.
  • The 0.5-liter capacity on the 502 through 804 models is consistent with a compact hydraulic power steering reservoir, typical of smaller-displacement agricultural or industrial machinery of the era.
  • The Marshall 302 specifies only a check interval of 400 hours with no fluid change interval listed, reflecting the simpler maintenance demands of a recirculating-ball or worm-and-sector steering box design versus a pressurized hydraulic circuit.
  • The 50-hour check interval on the 502, 602, 604, 702, 704, 802, and 804 is considerably more frequent than the 1,200-hour change interval, indicating that fluid level monitoring is treated as a routine operational task while full fluid replacement is a long-term service event.
  • A 1,200-hour change interval is a relatively extended service cycle, consistent with the lower thermal and oxidative stress placed on power steering fluid in machinery that operates at moderate hydraulic pressures compared to high-cycle industrial equipment.
  • The six models spanning the 602 through 804 range all share identical capacity, check, and change specifications, suggesting a common hydraulic steering system architecture across those configurations during the 1982-1990 production period.
  • The 502 shares the same 0.5-liter capacity and 50-hour check and 1,200-hour change intervals as the larger 602 through 804 models, indicating the power steering system was not scaled differently for the lower model designation.

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