SEAL 5P3148 - Caterpillar

At operating temperature, the hydraulic tank is hot and under pressure.Hot oil and components can cause personal injury. Do not allow hot oil or components to contact skin.Remove the filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand. Remove the filler cap slowly in order to relieve pressure.
Illustration 1 g00427378
Remove the step and cover assembly in order to gain access to the filters.
Slowly remove the hydraulic tank filler cap in order to relieve the system pressure.
Open the access door that is located on the right side of the machine next to the filler cap.Note: The case drain hydraulic filter must be removed for access to the filter for the hydraulic oil system. Replace both of the filters at the same time. See the Operation and Maintenance Manual, "Hydraulic System Case Drain Filter - Replace" .
Remove the access cover for the filter. The access cover is located under the fender on the right side of the machine. The opening provides the clearance that is needed to attach a tool to the hex-shaped bottom of the filter housing. Loosen the filter housing. The filter can be removed by hand after the filter is loosened.
Remove the filter housing and the filter element. Properly discard the filter element.
Inspect the seal on the filter housing. If the seal is damaged or worn, install a new seal. Install a new filter element into the filter housing.
Apply a light coat of clean oil to the seal for the filter housing. Install the filter element and the filter housing. Tighten the filter housing to a torque of 60 10 N m (44 7 lb ft) .
Inspect the seal on the filler cap. If the seal is worn or damaged, install a new seal.
Start the engine. Run the engine for a few minutes. Check for leaks.
Maintain the hydraulic oil to the "FULL" mark in the sight gauge.