873714 Volvo.Penta Thermo monitor, coolant alarm

At operating temperature, the hydraulic oil is hot and under pressure. Hot oil can cause burns. To prevent possible personal injury, release the pressure in the implement hydraulic circuits (boom, stick and bucket) before any hydraulic lines or components are disconnected or removed.
1. Release the pressure in the hydraulic system as follows: a. Fully retract the rod in the stick cylinder.b. Adjust the position of the bucket so it will be flat on the ground when the boom is lowered.c. Lower the boom until the bucket is flat on the ground.d. Stop the engine, and put the hydraulic activation control lever in the "Lock" position.e. Move the control levers for the boom, bucket, stick and swing through their full travel strokes. This will relieve any pressure that may be present in the pilot system.f. Slowly loosen the Fill/Vent plug on the hydraulic oil tank to release the pressure.g. Tighten the Fill/Vent plug on the hydraulic oil tank.h. The pressure in the hydraulic system has now been released. Lines and components can now be removed.2. Drain the oil from the hydraulic oil tank into a suitable container for storage or disposal. The capacity of the hydraulic oil tank is 90 liters (23.7 U.S. gal). 3. Open the right rear access door to the engine/main hydraulic pump compartment. 4. Remove the bolts and washers that hold sheet assembly (3) in position above the main hydraulic pump. Remove the sheet assembly.5. Remove bolt (1) from the clip that holds cable assembly (2) in position. 6. Remove bolt (4) from the clip that holds cable assembly (2) in position at the opening of the sheet assemblies