HOSE AS 0874935 - Caterpillar

Overhaul Intervals
Some factors that are important for determining the overhaul intervals include the following considerations:
Performance of preventive maintenance
Use of recommended lubricants
Use of recommended coolants
Use of recommended fuels
Proper installation
Operating conditions
Operation within acceptable limits
Engine load
Engine speedGenerally, engines that are operated at a reduced load and/or speed achieve more service life before an overhaul. However, the engines must be operated and maintained properly.Other factors must also be considered for determining a major overhaul:
The total amount of fuel consumption
The service hours of the engine
An increase of oil consumption
An increase of crankcase blowby
The wear metal analysis of the lube oil
An increase in the levels of noise and vibrationAn increase of wear metals in the lube oil indicates that the bearings and the surfaces that wear may need serviced. An increase in the levels of noise and vibration indicates that rotating parts require service.Note: Oil analysis may indicate a decrease of wear metals in the lube oil. The cylinder liners may be worn so that polishing of the bore occurs. Also, the increased use of lube oil will dilute the wear metals.Monitor the engine as the engine accumulates service hours. Consult your Cat dealer about scheduling a major overhaul.Note: The driven equipment may also require service when the engine is overhauled. Refer to the literature that is provided by the OEM of the driven equipment.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. Table 2 lists average ranges of fuel consumption and service hours for standard displacement engines. These tables are based on a load factor of approximately 60 percent.
Overhaul intervals are guidelines and are dependent on the maintenance and usage factors described in this Operation and Maintenance Manual.
Maintenance intervals must be reduced for engines that operate in a severe service application. Maintenance intervals must also be reduced for engines that operate in excess of the engine rating definition.
Table 1
Maintenance Interval Schedule
Service Hours (SH) and Fuel Consumption for 3512C Engines(1)
RPM 1600 RPM 1800 RPM
Rating A B C A B C
250 SH 44040 L (11635 US gal) 48640 L (12850 US gal) 51520 L (13610 US gal) 42700 L (11280 US gal) 56210 L (14850 US gal) 58140 L (15360 US gal)
500 SH 88090 L (23270 US gal) 97270 L (25695 US gal) 103060 L (27225 US gal) 85400 L (22560 US gal) 112430 L (29700 US gal) 116290 L (30720 US gal)
1000 SH 176170 L (46540 US gal) 194530 L (51390 US gal) 206120 L (54450 US gal) 170800 L (45120 US gal) 224850 L (59400 US gal) 232580 L (61440 US gal)
2000 SH 352350 L (93080 US gal) 389060 L (102780 US gal) 412230 L (108900 US gal) 341600 L (90240 US gal) 449710 L (118800 US gal) 4651510 L (122880 US gal)
3000 SH 528520 L (139620 US