LAMP GP 2783058 - Caterpillar

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
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 work tools have been lowered to the ground, and the 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.
Illustration 1 g00834700
Pump compartment (1) Vent plug
While the engine is stopped, remove vent plug (1). Allow the main pumps to fill with hydraulic oil.
To avoid system damage, make sure that the hydraulic pump is properly filled with hydraulic oil before start-up.
After the pumps fill with oil, install vent plug (1). Tighten vent plug (1) and start the engine in low idle. Move the joystick to the full BOOM RAISE position. Hold the joystick in this position.
Stop the engine and slowly lower the boom until the bucket is on the ground. This pressurizes the hydraulic tank.
Slowly loosen vent plug (1) until the oil flows out of the opening. This indicates that the air has been released from the main pumps.
Tighten vent plug (1) to the specified torque.