ACCUMULATOR AS-RIDE CONTROL 1242461 - Caterpillar

Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the attachments have been lowered, oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
Use the following procedure to release the pressure in the hydraulic system. Perform this procedure before any work is done to the hydraulic system.
Stop the engine.
Turn the engine start switch key to the ON position. Disengage the parking brake.
Press each side of the control switch for the auxiliary circuit for one or two seconds. The pilot operated hydraulic controls should remain in the NEUTRAL position when the switch is pressed.
Engage the parking brake. Start the engine and allow the engine to run for at least 15 seconds in order to recharge the accumulator.
Stop the engine. Turn the engine start switch to the ON position. Disengage the parking brake.
Move the pilot operated hydraulic controls through all of the positions.
Turn the engine start switch to the OFF position.The pressure in the hydraulic system has now been released.Note: Some pilot lines on the downstream side of the accumulator may still contain pressurized oil. Use caution when you disconnect these pilot lines.