ANTENNA AS 3829556 - Caterpillar

Operating engines above the rating definitions can result in shorter service life before overhaul.
Typical operating parameters for each rating level are summarized in Table 1. Table 1 assumes the use of a propeller that has a fixed pitch. If a propeller that has a controllable pitch is used, consult your Caterpillar dealer for information on reduced engine rpm. Optimum fuel consumption can be obtained by operating the engine at the Suggested Reduced rpm.For most applications, the customer can provide profile information from similar vessels or from the actual vessel. If such information does not sufficiently indicate the operating profile, instruments are available to more precisely define engine operation. A 7D-1513 Tachograph can establish an operating profile. The 7D-1513 Tachograph records engine rpm versus time on a paper graph. 3034 Marine Engines
Table 1
3034 Naturally Aspirated Marine Engine Ratings    
    Full Throttle        
Rating Level     Time     Rated rpm     Suggested Reduced rpm
Cruising Speed    
A     Up to 100 percent     -     -    
B     Up to 80 percent     -     -    
C     Up to 50 percent     2600     2400    
D     Up to 16 percent     -     -    
E     Up to 8 percent     -     -    
Table 2
3034 Turbocharged Marine Engine Ratings    
    Full Throttle        
Rating Level     Time     Rated rpm     Suggested Reduced rpm
Cruising Speed    
A     Up to 100 percent     -     -    
B     Up to 80 percent     -     -    
C     Up to 50 percent     2600     2400    
D     Up to 16 percent     -     -    
E     Up to 8 percent     -     -