LAMP GP-FLOOD 3883782 - Caterpillar

To prevent possible personal injury, make sure all cushion hitch components are completely lowered, the pressure from the hydraulic system is released and the engine has been shut off for a minimum of five minutes to be sure that the accumulator oil pressure is zero. The accumulator is filled with dry nitrogen. Do not loosen or remove the valve from the cap on top of the accumulator. A bleed screw at the bottom of the accumulator can be used to release any pressure that remains in the system.
1. Disconnect hose (2) from block (1) to drain the oil from the accumulator.2. Remove the bolts and disconnect block (1) from the accumulator. 3. Fasten tooling (A) and a hoist on accumulator (3) as shown.4. Remove the bolts, bracket (4), two bolts (5) and accumulator (3) from the cushion hitch. The weight of the accumulator is 124 kg (273 lb.).Install Accumulators (Cushion Hitch)
1. Inspect for wear or damage and make a replacement, if necessary, of the O-ring seal on the block before accumulator (1) is installed.2. Fasten tooling (A) and a hoist to accumulator (1) as shown. Put accumulator (1) in position on the cushion hitch and install bolts (2) that hold it. 3. Install bracket (3) on accumulator (1) and the bolts that hold it. 4. Connect block (4) to the accumulator.5. Inspect the O-ring seal on hose (5) for wear or damage and make a replacement if necessary.6. Connect hose (5) to block (4).Disassemble Accumulators (Cushion Hitch)
START BY:a) remove accumulators (cushion hitch) 1. Use tool group (A) to slowly release the nitrogen from accumulator (1). 2. Remove the bolts and tube assembly (2) from accumulator (1).3. Remove the O-ring seals from tube assembly (2). 4. Remove the bolts and manifold (3) from the accumulator.5. Remove the O-ring seal from manifold (3). 6. Remove bolts (4) and cover assembly (5) from the accumulator. 7. Put accumulator (1) in position on tool (B) as shown.8. Remove bolts (7) and head (6) from accumulator (1). 9. Remove O-ring seal (8) and ring (9) from the head. 10. Use tooling (C) and remove the piston from accumulator (1). 11. Remove seal groups (11) from piston (10).Assemble Accumulators (Cushion Hitch)
1. Make sure the inside of the accumulator is clean and free of dirt and foreign material.2. Inspect seals and rings for wear or damage and make a replacement if necessary. 3. Install seal groups (2) on piston (1). 4. With accumulator (3) in position on tool (B) as shown, use tooling (A) to install piston (1) into the accumulator. Make sure the threaded hole in the piston is toward the head end of the accumulator. 5. Install backup ring (5) and O-ring seal (4) on head (3). Make sure the backup ring is next to the flange of the head. 6. Put clean hydraulic oil on the O-ring seal and the backup ring.7. Put head (3) in position on the accumulator and install bolts (6).8. Use tool (C) and tighten the bolts to