43242 12 Mariner CABLE-THROTTLE

Using Fuel Consumption For Calculating the Overhaul Intervals
Experience has shown that maintenance intervals are most accurately based on fuel consumption. Fuel consumption corresponds more accurately to the engine load. Tables 1and 2 list average ranges of fuel consumption and service hours for a load factor of approximately 25 percent.
Table 1
Maintenance Interval Schedule
Service Hours and Fuel Consumption for 3512B High Displacement Locomotive Engines (1)
Interval Rated 1301 To 1600 RPM Rated 1601 To 1800 RPM
500 Service Hours 34 660 L (9,155 US gal) 41640 L (11,000 US gal)
1000 Service Hours 69330 L (18,315 US gal) 83190 L (21,975 US gal)
2000 Service Hours 138640 L (36,625 US gal) 166370 L (43,950 US gal)
4000 Service Hours 277290 L (73,250 US gal) 332750 L (87,900 US gal)
6000 Service Hours 415930 L (109,875 US gal) 499120 L (131,850 US gal)
8000 Service Hours 569550 L (150,460 US gal) 683460 L (180,550 US gal)
Top End Overhaul 21 600 Service Hours 18 000 Service Hours
1 500 000 L (396,255 US gal)
In-Frame Inspection 43 200 Service Hours 36 000 Service Hours
3 000 000 L (792,510 US gal)
Major Overhaul 86 400 Service Hours 54 000 Service Hours
4 500 000 L (1,188,765 US gal)
(1) Fuel consumption is based on a load factor of approximately 25 percent.
Table 2
Maintenance Interval Schedule
Service Hours and Fuel Consumption for 3516B High Displacement Locomotive Engines (1)
Interval Rated 1301 To 1600 RPM Rated 1601 To 1800 RPM
500 Service Hours 46 210 L (12,205 US gal) 55 460 L (14,650 US gal)
1000 Service Hours 92 430 L (24,420 US gal) 110 920 L (29,300 US gal)
2000 Service Hours 184 860 L (48,835 US gal) 221 830 L (58,600 US gal)
4000 Service Hours 369 720 L (97,670 US gal) 443 660 L (117,200 US gal)
6000 Service Hours 554 580 L (146,505 US gal) 665 500 L (175,805 US gal)
8000 Service Hours 739 440 L (195,335 US gal) 887 330 L (234,405 US gal)
Top End Overhaul 21 600 Service Hours 18 000 Service Hours
1 942 000 L (513,020 US gal)
In-Frame Inspection 43 200 Service Hours 36 000 Service Hours
3 884 000 L (1,026,040 US gal)
Major Overhaul 86 400 Service Hours 54 000 Service Hours
5 826 000 L (1,539,055 US gal)
(1) Fuel consumption is based on a load factor of approximately 25 percent.Use the actual records of fuel consumption, when possible. If the actual records are not available, use the following procedure in order to estimate the fuel consumption.
Estimate the average percent of the load for the operation of the engine.
Refer to the fuel consumption data in the Technical Marketing Information (TMI) for your engine. This will determine the fuel consumption for the percent of the load that was estimated in Step 1. Use this figure as variable "F" for the equation in Table 3. For more information about the Technical Marketing Information (TMI) for your engine, consult your Caterpillar dealer.
Table 3
Equation For Calculating Overhaul Intervals
F/R = H
“F” is the estimated total amount of fuel consumption of the engine.
“R” is the rate