2772867 ENGINE AR-COMPLETE Caterpillar parts
C15
Rating:
Alternative (cross code) number:
CA2772867
277-2867
2772867
CA2772867
277-2867
2772867
TRUCK ENGINE,
Compatible equipment models: 2772867:
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Information:
Machines without a Boom Lowering Control Valve
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.
When you must manually lower the boom due to engine shutdown, use the following procedure.Relieve the pressure in the hydraulic system before manually lowering the boom. Move the hydraulic lockout lever to the UNLOCKED position. Move the travel levers/pedals forward and backward in order to relieve the pressure.
Pressurized system!The hydraulic tank contains hot oil under pressure. To prevent burns from the sudden release of hot oil, relieve the tank pressure with the engine off by slowly turning the cap approximately 1/8 of a turn until the cap reaches the secondary stop.
Illustration 1 g02275615
Filler cap
(A) LOCK position
(B) PRESSURE RELEASE - START position
(C) PRESSURE RELEASE - END position
(D) OPEN position
Release the pressure that may be present in the return hydraulic circuit with the following procedure. Refer to Illustration 1 for filler cap positions.
Turn the filler cap counterclockwise, with no downward force applied, and move the arrow from position (A) to position (B).
Release the pressure for a minimum of 45 seconds by moving the arrow from position (B) to position (C).
Push the center of the filler cap down. Without tilting the filler cap, move the arrow from position (C) to position (D).
The hydraulic tank pressure is relieved. Tighten the filler cap on the hydraulic tank to position (A).
Open the engine hood.
Illustration 2 g02526116
(2) Hose
(3) Clamp
Loosen clamp (3) and disconnect hose (2) from the coolant tank.
Illustration 3 g02736277
Hydraulic valve
(2) Hose
(4) Screw
Connect one end of hose (2) to screw (4). Put the other end of hose (2) into the filler opening.
Slowly loosen screw (4) by a maximum of 1/2 turn. This allows the hydraulic oil in the boom circuit to drain into the hydraulic tank. The boom will now start to lower.
Make sure that the work tool has lowered all the way to the ground. Tighten screw (4) to a torque of 13 2 N m (9 1 lb ft).
Disconnect hose (2) from screw (4). Do not allow the oil that is contained in hose (2) to spill. Drain the oil into a suitable container.
Connect hose (2) to the original position on the radiator and install hydraulic tank filler cap.
Close the engine hood. After completion of the manual boom lowering, make necessary repairs before you operate the machine again.Machine 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.
If the engine is shut down or the hydraulic system is disabled, the operator can
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.
When you must manually lower the boom due to engine shutdown, use the following procedure.Relieve the pressure in the hydraulic system before manually lowering the boom. Move the hydraulic lockout lever to the UNLOCKED position. Move the travel levers/pedals forward and backward in order to relieve the pressure.
Pressurized system!The hydraulic tank contains hot oil under pressure. To prevent burns from the sudden release of hot oil, relieve the tank pressure with the engine off by slowly turning the cap approximately 1/8 of a turn until the cap reaches the secondary stop.
Illustration 1 g02275615
Filler cap
(A) LOCK position
(B) PRESSURE RELEASE - START position
(C) PRESSURE RELEASE - END position
(D) OPEN position
Release the pressure that may be present in the return hydraulic circuit with the following procedure. Refer to Illustration 1 for filler cap positions.
Turn the filler cap counterclockwise, with no downward force applied, and move the arrow from position (A) to position (B).
Release the pressure for a minimum of 45 seconds by moving the arrow from position (B) to position (C).
Push the center of the filler cap down. Without tilting the filler cap, move the arrow from position (C) to position (D).
The hydraulic tank pressure is relieved. Tighten the filler cap on the hydraulic tank to position (A).
Open the engine hood.
Illustration 2 g02526116
(2) Hose
(3) Clamp
Loosen clamp (3) and disconnect hose (2) from the coolant tank.
Illustration 3 g02736277
Hydraulic valve
(2) Hose
(4) Screw
Connect one end of hose (2) to screw (4). Put the other end of hose (2) into the filler opening.
Slowly loosen screw (4) by a maximum of 1/2 turn. This allows the hydraulic oil in the boom circuit to drain into the hydraulic tank. The boom will now start to lower.
Make sure that the work tool has lowered all the way to the ground. Tighten screw (4) to a torque of 13 2 N m (9 1 lb ft).
Disconnect hose (2) from screw (4). Do not allow the oil that is contained in hose (2) to spill. Drain the oil into a suitable container.
Connect hose (2) to the original position on the radiator and install hydraulic tank filler cap.
Close the engine hood. After completion of the manual boom lowering, make necessary repairs before you operate the machine again.Machine 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.
If the engine is shut down or the hydraulic system is disabled, the operator can