Marshall All models

Coolant capacity & service interval

Marshall All models require coolant with a capacity range of 7 to 7,95 liters. Service intervals consist of a 10 hour check and a 24 month change. 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 7 liter
  • Check 10 hours
  • Change 24 months
502 (1982-1990)
  • Use: Normal
  • Capacity 7,95 liter
  • Check 10 hours
  • Change 24 months
602 (1982-1990)
  • Use: Normal
  • Capacity 7,95 liter
  • Check 10 hours
  • Change 24 months
604 (1982-1990)
  • Use: Normal
  • Capacity 7,95 liter
  • Check 10 hours
  • Change 24 months
702 (1982-1990)
  • Use: Normal
  • Capacity 7,95 liter
  • Check 10 hours
  • Change 24 months
704 (1982-1990)
  • Use: Normal
  • Capacity 7,95 liter
  • Check 10 hours
  • Change 24 months
802 (1982-1990)
  • Use: Normal
  • Capacity 7,95 liter
  • Check 10 hours
  • Change 24 months
804 (1982-1990)
  • Use: Normal
  • Capacity 7,95 liter
  • Check 10 hours
  • Change 24 months

Additional Notes

  • The Marshall 302 cooling system capacity of 7 liters is the only value in the lineup that falls below 7.95 liters, placing it in a distinct capacity class from all other models covered in the 1982-1990 range.
  • The 502, 602, 604, 702, 704, 802, and 804 models all share an identical cooling system capacity of 7.95 liters, indicating a common engine cooling architecture across those configurations despite differences in model designation.
  • A 7.95-liter cooling system capacity is consistent with a mid-displacement agricultural or industrial engine, where a larger coolant volume supports sustained thermal management under prolonged load conditions.
  • The 302 specification applies only to the 1982-1985 period, while all other models in the lineup carry specifications running through 1990, making the 302 the shortest-covered model in the dataset.
  • A 10-hour check interval for coolant level is a standard practice in equipment operated in continuous or heavy-duty cycles, where heat cycling and minor losses through evaporation or seepage can affect system integrity between formal service events.
  • The 24-month coolant change interval applies uniformly across all models under normal use conditions, meaning seasonal or calendar-based scheduling rather than hour-meter-based replacement governs full coolant renewal for the entire Marshall lineup covered here.
  • The combination of a 10-hour level check alongside a 24-month full change reflects a two-tier maintenance structure: frequent monitoring to catch low levels early, and periodic full replacement to address coolant degradation over time.
  • The consistency of the 24-month change interval and 10-hour check interval across all eight model variants, regardless of capacity differences, suggests a unified service policy applied across the Marshall range for this system during the 1982-1990 period.

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