ALARM GP-TRAVEL 3606166 - Caterpillar

Machines without a Boom Lowering Control Valve
To lower the boom, place the hydraulic activation control lever in the UNLOCKED position. Move the joystick to the BOOM LOWER position. If the accumulator is still charged, the boom will lower.If the boom does not lower, the accumulator is empty. Use the following method to lower the boom.
Be sure no one is under or near the work tools before manually lowering the boom. Keep all personnel away from the boom drop area when lowering the boom with the engine stopped in order to avoid possible personal injury.
Personal injury can result from oil under high pressure.DO NOT allow high pressure oil to contact skin.Wear appropriate protective equipment while working with high pressure oil systems.
Note: Refer to Operation and Maintenance Manual, "General Hazard Information" for information on Containing Fluid Spillage.
Illustration 1 g03348039
Open the access door on the right side of the machine.
Connect hose (2) to boom manual lowering valve (1).
Slowly open boom manual lowering valve (1) by a maximum of 1/2 turn in order to lower the boom. Drain hydraulic oil into a suitable container.
Make sure that the work tool has lowered all the way to the ground. Tighten boom manual lowering valve (1) to a torque of 13 2 N m (9 1 lb ft).
Make the necessary repairs before you operate the machine.
Check the level of the hydraulic fluid. Refer to Operation and Maintenance Manual, "Hydraulic System Oil Level-Check".
Close the access door. Machines with a Boom Lowering Control Valve
If the engine is stopped or the hydraulic system is disabled, the operator can still lower the boom. Use the following procedure if the machine is equipped with a boom lowering control valve:
Boom load may cause cylinder oil pressure to reach relief pressure of the boom lowering control device when the boom is supported by one cylinder. Boom can lower suddenly, causing possible injury or death.To avoid possible injury or death, be sure no one is under or near the work tool before manually lowering the boom.Keep all personnel away from the boom drop area when lowering the boom with the engine stopped.
Illustration 2 g03348040
(3) Boom lowering control valve
(4) Locknut
(5) Set screw
(6) Boom Note: The boom lowering control valve is at the base of the boom cylinder. The boom lowering control device allows the operator to manually lower the boom if the engine is stopped. The boom lowering control device also prevents a sudden drop of the boom if there is an oil leak in the hydraulic line of the boom.
Loosen locknut (3).
Slowly, turn set screw (5) counterclockwise until the boom begins to lower onto the ground. Note: Once the boom begins to lower, stop turning set screw (5).
After the boom has lowered completely onto the ground, turn set screw (5) back to the original position.
Tighten locknut (4).
Make any necessary repairs before placing the excavator back into service. Note: Consult your Caterpillar dealer for further information.Blade (If Equipped)
In order to lower the blade, place the hydraulic lockout control in the UNLOCKED position. Move the