Από κιβώτια (ρεβέρσες) ZF

*Duty Definitions
**PLEASURE DUTY DEFINITION **Highly intermittent operation with very large variations in engine speed and power
Average engine operating
hours limit:
500 hours/year
300 hours/year for mechanical gearboxes
Typical hull forms: Planing.
Typical applications: Private, non-commercial, non-charter sport/leisure activities.
**LIGHT DUTY DEFINITION **Intermittent operation with large variations in engine speed and power
Average engine operating
hours limit:
2500 hours/year
(for hydraulic gearboxes smaller than the ZF 650 series, 2000 hours/year).
Typical hull forms: Planing and semi-displacement.
Typical applications: Private and charter, sport/leisure activities, naval and police activities.
**MEDIUM DUTY DEFINITION **Intermittent operation with some variations in engine speed and power
Average engine operating
hours limit:
4000 hours/year.
3500 hours/year for gearboxes smaller than ZF 2000 series and workboat ZF W2700 series.
Typical hull forms: Semi-displacement and displacement
Typical applications: Charter and commercial craft (example: crew boats and fast ferries), and naval and police activities.
**CONTINUOUS DUTY DEFINITION *Continuous operation with little or no variations in engine speed and power
Average engine operating
hours limit: Unlimited
Typical hull forms: Displacement.
Typical applications: Heavy duty commercial vessels, tugs, fishing boats.

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