GEAR-PLANETARY 1912600 - Caterpillar

The hydraulic accumulator is installed in the pilot manifold located behind the right rear access door. Fluid Spillage ContainmentCare must be taken to ensure that the fluids are contained during performance of the inspection, the maintenance, the testing, the adjusting and the repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to the "Tools And Shop Products Guide", NENG2500 for the tools and the supplies suitable to collect and contain any of the fluids in Caterpillar machines. Dispose of the fluids according to local regulations and mandates.1. Start the machine, and fully extend the stick and the bucket. Lower the stick and the bucket to the ground.
At operating temperature, the hydraulic oil tank is hot and under pressure. Hot oil can cause burns. To prevent possible personal injury, release the pressure in the implement hydraulic circuits (the boom, the stick and the bucket) before any of the hydraulic lines or any of the components are disconnected or removed.
2. Release the pressure in the implement hydraulic circuits (the boom, the stick and the bucket) before any of the hydraulic lines or any of the components are disconnected or removed. Release the pressure as follows:a. Shut off the engine and place key in the "ON" position. Put the hydraulic activation control lever in the "UNLOCK" position.b. Move the control levers for the boom, the stick and the swing to all full stroke positions. This will release any pressure that might be present in the pilot system.c. Return the key to "OFF" position.d. Slowly loosen the fill plug on the hydraulic tank, and release the pressure.e. Tighten the fill plug on the hydraulic tank.f. The pressure in the hydraulic system has been released, the lines and the components can be removed. Do Not release the nitrogen from the hydraulic accumulator unless the unit is to be disassembled.3. Remove hydraulic accumulator (1) by turning the hex nut located at the bottom of the accumulator. Remove the O-ring seal from the accumulator. The following steps are for the installation of the hydraulic accumulator.4. Install the hydraulic accumulator in the reverse order of the removal. Check the condition of the O-ring seal. If the O-ring seal is damaged, use a new part for replacement. Refer to the topic "Lubricant Viscosities and Refill Capacities" in the "Operation & Maintenance Manual" for the proper filling procedure and the proper levels for the hydraulic oil system.5. Check the oil level in the hydraulic oil tank. Fill the hydraulic oil tank with oil to the correct level.6. If the hydraulic accumulator was disassembled, use Tooling (A) to recharge it.