TUBE 2239654 - Caterpillar

Illustration 1 g00101508
Place the machine in the servicing position.
Move the hydraulic lockout control to the ENABLED position. Stop the engine.
Illustration 2 g01208340
Slowly loosen the filler plug in order to relieve any pressure.
Tighten the filler plug after the pressure is relieved.
Place the joysticks in the HOLD position.
Start the engine and turn the engine speed dial to the high idle position "10". DO NOT MOVE ANY CONTROL.
Open the access door on the right side of the machine.
Illustration 3 g01087411
Install the pressure gauge on the pressure nipple on top of the fine filtration filter and read the value. If the pressure is between "1 bar" and "3 bars", the element for the fine filtration filter is clean.If the pressure is more than "3 bars", the element is clogged. If this occurs, replace the element for the fine filtration filter. Refer to Operation and Maintenance Manual, "Hydraulic System Filter Element (Fine Filtration) - Replace" for information on replacing the element for the fine filtration filter.
Close the access door.