HOUSING 4826779 - Caterpillar

Sudden movement or accidental starting of the machine can cause personal injury or death to persons on or near the machine.To prevent personal injury or death, perform the following:Park the machine on a smooth, level surface.Lower the work tool to the ground and engage the parking brake.Stop the engine and remove the key.Block the wheels and install the steering frame lock.
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, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
Table 1
Required Tools
Part Number Description
8T-9208 Probe Assembly
5P-6442 Hose The hydraulic oil in this system is SAE 10. If the oil becomes contaminated, premature component failure could result. Contaminated oil can also contribute to overheating. Use the following procedure in order to sample the oil for the implement system.
Start the engine and run the engine at high idle. Allow the oil temperature to reach the normal operating temperature.
Move all cylinders through a minimum of ten full cycles.
Turn the key start switch to the OFF position.
Turn the key start switch to the ON position. Move all control levers through all positions in order to release any pressure in the hydraulic system.
Pump the brake pedal enough times in order to release the pressure in the brake system.
Hold down the plunger for the breaker relief valve.
Illustration 1 g02706316
Location of the fluid sampling valve on the pilot pump for the right Implement pump
Purge the fluid sampling valve. Insert an 8T-9208 Probe Assembly into the fluid sampling valve. Draw a 50 mL oil sample through the fluid sampling valve into a suitable container. The level of contaminants must be lower than the values in the following table. Note: Use approximately 150 mm (6 inch) length of tube on the end of the probe. Reference: Refer to Special Publication, PEHP6001, "How To Take A Good Oil Sample" for more information about obtaining an oil sample.
Start the engine and allow the engine to run at low idle. Note: Do not operate the hydraulic controls.
Draw a 50 mL oil sample through the fluid sampling valve. The level of contaminants must be lower than the values in the following table.
Table 2
Hydraulic Oil Contamination
ISO Code Particle Size (Microns) Maximum Number of Particles Per 1 mL Sample
18 5 2500
15 15 320 Note: The concentration of the particles by size should be monitored over a series of samples. This information can be used in order to spot abnormal wear before a failure occurs. A spectrographic analysis of the samples can be used in order to identify the composition of the particles. The analysis of the oil sample may be used in order to identify the components that are failing.