hey guys just joined the forum and love it so much useful info. Here is my problem i have to take a valve for the aux attachments off and replace it. I need to know how to relieve the system of pressure. I have looked in the manual provided with the machine and it does not explain how. Can someone please lead me in the right direction
For a single circuit. Position the machine on level ground. Fully retract the stick cylinder rod. Adjust the position of the bucket so that the bucket is parallel to the ground. Lower the boom until the bucket is flat on the ground. Shut off the engine. Turn the engine start switch to the ON position without starting the engine. Place the hydraulic activation control lever in the UNLOCKED position. Move only the joysticks or the pedals of the hydraulic circuit that requires service to the FULL STROKE positions. This will release the high pressure only in that single hydraulic circuit. This will also release any pressure that might be present in the pilot hydraulic circuit. Note: If the desired hydraulic circuit that requires service requires the activation of a switch for operation, activate the necessary switches for the operation of the hydraulic circuit. Place the hydraulic activation control lever in the LOCKED position. Turn the engine start switch to the OFF position. Slowly loosen the filler cap on the hydraulic tank and release the pressure from the hydraulic tank. Leave the filler cap loose for a minimum of 45 seconds. This will release the pressure that may be present in the return hydraulic circuit. Tighten the filler cap on the hydraulic tank. The pressure in the single hydraulic circuit that requires service is now released and lines and components can be disconnected or removed from that hydraulic circuit. NOTE that the procedure for relieving pressure on multiple circuits is slightly different.