Enabling the Oil Renewal System (ORS)
The ORS can be enabled in the factory or in the field. A factory password is required to enable this feature. This feature is contained in the standard software. A password is not required to install the software. The system must be enabled by Caterpillar Electronic Technician (ET).
Refer to Special Instruction, REHS1238, "Obtaining Factory Passwords and Software Enabled Attachments". Refer to Special Instruction, REHS1727, "Installation of the Oil Renewal System for Track-Type Tractors" for the D11R.
The rate of the oil that is metered into the fuel system can be adjusted with Cat ET. The adjustment determines the percent of oil that is metered to the fuel. The adjustment is calculated by the engine's Electronic Control Module (ECM). The adjustment is based on the following factors:
- Engine load
- Engine oil pressure
- Jacket water coolant temperature
A nominal setting of zero is the default setting when the system is initially turned on. For every one gallon of fuel that is burned, 0.5 percent of oil is injected. Only adjust the rate of metering if the S·O·S Oil Analysis determines that additional adjustment for metering of oil is needed. The ranges for adjustment are from a value of −50 to +50. Entering −50 will decrease the rate by 50 percent. Entering +50 will increase the rate by 50 percent.
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| Illustration 1 | g00707282 |
The following items can have an impact on the adjustment of the ORS and these items may also determine when the ORS is adjusted: the load factor, the typical fuel rate and the consumption of oil. A typical example of the various factors are listed in Table 1.
| Power
(hp) |
Maximum Fuel Rate (1) | Typical Load Factor
(%) |
Typical Fuel Rate (2) | Adjustment of the Oil Rate | Oil To Fuel
(%) |
Metered Oil In 24 Hours
(1)(3) |
Normal Oil Consumption In 24 Hours
(1)(4) |
Total Oil that is Used In 24 Hours (1) |
| 935 | 46 | 65 | 40 | +50 | 0.75 | 5.4 | 0.6 | 6.0 |
| 935 | 46 | 55 | 35 | +50 | 0.75 | 4.6 | 0.5 | 5.1 |
| 935 | 46 | 45 | 30 | +50 | 0.75 | 3.7 | 0.4 | 4.1 |
| 935 | 46 | 65 | 40 | 0 | 0.50 | 3.6 | 0.6 | 4.2 |
| 935 | 46 | 55 | 35 | 0 | 0.50 | 3.0 | 0.5 | 3.5 |
| 935 | 46 | 45 | 30 | 0 | 0.50 | 2.5 | 0.4 | 2.9 |
| 935 | 46 | 65 | 40 | -50 | 0.25 | 1.8 | 0.6 | 2.4 |
| 935 | 46 | 55 | 35 | -50 | 0.25 | 1.5 | 0.5 | 2.0 |
| 935 | 46 | 45 | 30 | -50 | 0.25 | 1.3 | 0.4 | 1.7 |
| (1) | Gallons per hour |
| (2) | Gallons per hour |
| (3) | This is the amount of oil that is metered into the fuel. This is also the amount of oil that is depleted from the makeup tank. |
| (4) | This is the amount of oil that is consumed in the crankcase during normal engine operation. |
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| Illustration 2 | g01044329 |
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Graph of oil consumption versus fuel consumption | |
Reviewing the report from the S·O·S Oil Analysis will indicate if the metering rate needs to be adjusted. The rate may need to be increased if the limits of the infrared analysis and the wear metals are too high.
The following various factors that are specific to the site can affect the limits of the oil condition:
- Altitude
- Engine hours
- Maintenance
- Air cleaners
- Oil type and brand
- Operating conditions
Several conditions can affect the operation of the ORS.
The machine's ECM controls the cycle and the activation of the oil renewal solenoid. Electrical problems with the ORS can also be detected by the ECM. The ECM will deactivate the ORS if there is an electrical problem with the following components:
- Oil level sensor for the makeup tank
- Fuel level sensor
- Oil renewal solenoid
Cycle the power after the problem is resolved in order to reactivate the system.
Oil Level in the Makeup Oil Tank
An electronic oil level sensor is located in the makeup oil tank. If the oil in the makeup oil tank drops to the level of the sensor, the sensor is activated. A warning is displayed. If this warning occurs, the ORS will automatically turn off. The ORS will automatically turn on after the oil level is raised in the makeup oil tank.
The machine's fuel tank is equipped with a fuel level sensor. This sensor works with the monitoring system in order to notify the operator when a low fuel level occurs. If the machine is operated at a low fuel level with an oil/fuel blend, the fuel system can be damaged. The ORS will automatically turn off when the ten percent level occurs in the fuel tank. Refilling the tank will correct this problem. The ORS will be automatically turned on.
Fuel Filter Differential Pressure
The fuel filter differential pressure is measured by a pressure switch that is located on the filter base. If the filter differential pressure exceeds