HANDLE AS 8T4160 - Caterpillar

Illustration 1 g01137376
Relieve the internal pressure from the hydraulic tank by loosening the fill/vent plug. After the pressure is relieved, remove the fill/vent plug.
Illustration 2 g01137581
Remove the two access covers that are located under the hydraulic tank. This will allow access to the drain valve and the pipe.
Illustration 3 g01137579
Note: Refer to Operation and Maintenance Manual, "General Hazard Information" for information that pertains to containing fluid spillage.
Remove plug (1) .
Illustration 4 g01137580
(2) Drain plug (3) Pipe Nipple (4) Tube
Install a pipe nipple (3) with a clear plastic tube (4) into the hole on the bottom of the hydraulic tank.
Loosen drain plug (2) in order to drain the oil.
Drain the oil into a suitable container.
After the oil has been drained, tighten drain plug (7) to 110 15 N m (81 11 lb ft).
Remove the pipe nipple.
Clean plug (1) and install the plug. Tighten the plug to 75 5 N m (55 48 lb ft).
Illustration 5 g01137392
Remove the plug from the tube. Allow the oil to drain into a container.
Inspect the O-ring. Replace the O-ring if wear or damage is evident.
Clean the plug. Install the plug and the O-ring into the drain port.
Illustration 6 g01137582
Remove the cover to the hydraulic tank screen.
Illustration 7 g01137588
(5) Spring (6) ScreenNote: Do not allow spring (5) to fall back into the tank.
Remove spring (5) and screen (6) .Note: Refer to Operation and Maintenance, "General Hazard Information" for information on containing fluid spillage.
Wash the screen in a clean nonflammable solvent. Allow the screen to dry. Inspect the screen. Replace the screen, if the screen is damaged.
There is an O-ring seal on the bottom of the screen. There is also an O-ring seal on the hydraulic tank around the opening for the screen. Inspect the O-ring seals. Replace the O-ring seals if wear or damage is evident.
Install the screen and the spring. Then install the cover.Note: Make sure that the O-ring seals and the spring are properly positioned during installation.Service the Hydraulic System Filters
Note: The hydraulic oil system must be empty when the filters are being serviced. Service the filters before refilling the machine with hydraulic oil.Note: Dispose of used filters and used fluids according to local regulations.Refer to the following topics in order to service the hydraulic system filters:
Operation and Maintenance Manual, "Hydraulic System Filter Element (Fine Filtration) - Replace"
Operation and Maintenance Manual, "Hydraulic System Oil Filter (Return) - Replace"
Operation and Maintenance Manual, "Hydraulic System Oil Filter (Case Drain) - Replace"
Operation and Maintenance Manual, "Hydraulic System Oil Filter (Pilot) - Replace"Fill the Hydraulic Tank
Fill the hydraulic system oil tank. Refer to Operation and Maintenance Manual, "Capacities (Refill)".
Inspect the O-ring seal on the filler plug for damage. Replace the O-ring, if necessary. Clean the filler plug. Install the filler plug.Note: Make no attempt to start the engine until the pump has been filled with hydraulic oil. Serious damage to the hydraulic components can result.When the hydraulic oil has been replaced, the air must be removed from the hydraulic oil system. To remove the air from the hydraulic oil system,