TAPPET 1039272 - Caterpillar

Selection of the Oil Change Interval
Your machine may be able to use a 4000 hour interval for the hydraulic oil. The hydraulic oil is in the system that is not integral to the service brakes, the clutches, the final drives, or the differentials. The standard change interval is 2000 hours. The oil should be monitored during intervals of 500 hours. The extended 4000 hour interval can be used if the following criteria are met.Oil Filters
Caterpillar oil filters are recommended. The interval for changing the oil filter should be 500 hours.Oil
The 4000 hour interval for changing the oil is for the following oil types.
Caterpillar Hydraulic Oil HYDO
Caterpillar Transmission and Drive Train Oil (TDTO)
Caterpillar TDTO (TMS)
Caterpillar Diesel Engine Oil
Caterpillar Biodegradable Hydraulic Oils HEES
Caterpillar Multipurpose Tractor Oil (MTO)
Heavy duty diesel engine oil with a minimum zinc content of 900 ppm Use heavy duty oils with the following classification: CF, CF-4, CG-4 and CH-4Note: Industrial hydraulic oils are not recommended in Caterpillar hydraulic systems. These oils are more likely to cause corrosion and excessive wear.Monitoring the Condition of the Oil
The oil should be monitored during intervals of 500 hours. Caterpillar's standard S O S Fluids Analysis or an equivalent oil sampling program should be used.The current guidelines for cleanliness of the oil should be observed. Refer to "Measured Data".If an oil sampling program is not available, the standard 2000 oil change interval should be used.Measured Data
The following information should be monitored by using a program for sampling the oil.
Significant changes in wear metals should be monitored. These metals include iron, copper, chromium, lead, aluminum, and tin.
Significant changes in additives should be monitored. These metals zinc, calcium, magnesium and phosphorus.
Contaminants should not be present. These contaminants include fuel and antifreeze. Water content should be .5 percent or less.
The silicon level should not exceed 15 parts per million for new oil. The particle counts should be monitored.
The recommended level of cleanliness for Caterpillar machines that are operated in the field is ISO 18/15 or cleaner. The cleanliness should be monitored by particle count analysis. Contamination levels should not exceed normal levels by more than two ISO codes. Action should be taken in order to determine the cause of the contamination. The system should be returned to the original levels of contamination.
There should not be significant changes in sodium, silicon, copper, and potassium.
The allowable level of oxidation is 40 percent (0.12 Abs units).
The kinematic viscosity at 100 °C (212 °F) should not exceed 2 cSt. Procedure for Changing the Hydraulic Oil
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Operate the machine for a few minutes in order to warm the hydraulic