CABLE 2279416 - Caterpillar

Make sure all of the pressure in the brake system is released before any lines are disconnected from the brake accumulator.
1. Remove the cover plates behind the operator's station. 2. Disconnect oil line (1) from the brake control valve. Use wire to hold the oil line to the brake accumulator.3. Install a 3/8"-16 NC forged eyebolt in the brake accumulator and fasten a hoist. 4. Remove two bolts (2) that hold the bottom of the brake accumulator in place. 5. Remove two bolts (3) that hold the top of the brake accumulator in place. Loosen the two bolts that hold bracket (4) in position. 6. Remove brake accumulator (5). The weight of the brake accumulator is 175 lb. (79 kg).Install Brake Accumulator
1. Install a 3/8"-16 NC forged eyebolt in the brake accumulator. Fasten a hoist and lower brake accumulator (1) in position in the machine.2. Install two bolts (3) that hold the bottom of the brake accumulator in place. 3. Install bolts (2) that hold the top of the brake accumulator in place. Tighten the bolts that hold bracket (4) in place. 4. Connect oil line (5) to the brake control valve.5. Install the cover plates behind the operator's station.6. Charge the accumulator with dry nitrogen gas. See TESTING AND CHARGING THE ACCUMULATOR in TESTING AND ADJUSTING.Disassemble Brake Accumulator
start by:a) remove brake accumulator
The accumulator contains nitrogen gas under high pressure. Do not try to disassemble the accumulator until the pressure has been released.
1. Release the nitrogen gas pressure from the accumulator. Turn valve assembly (3) slowly to release the nitrogen.2. Disconnect tube assembly (1) from the manifold.3. Remove manifold (2). Check the condition of the O-ring seal behind the manifold. If the seal has damage, use new parts for replacement. 4. Remove inlet manifold (4).5. Remove cover assembly (5) and the tube assembly as a unit. 6. Remove bolts (6) and head (7) from the accumulator assembly. 7. Remove seals (8) from the head. Check the condition of the seals and make replacements if needed. 8. Remove piston (9) from the accumulator with tooling (A). 9. Remove seal assemblies (10) from the piston.Assemble Brake Accumulator
1. Make sure the inside of the accumulator is clean and free of dirt and foreign material. 2. Install seal assemblies (1) in the piston as shown. 3. Put piston (2) in position in the accumulator as shown. Make sure threaded hole in the piston is toward the head end of the accumulator.4. Fasten tooling (A) to the piston and push the piston to the bottom of the accumulator. 5. Install seals (3) on the head assembly.6. Install two 7/8"-9 NC guide pins in the accumulator as shown. Put clean hydraulic oil on seals (3) and put head assembly (4) in position in the accumulator. 7. Install bolts (5) that hold the head assembly in position. Tighten the bolts to a torque of 700 25 lb.ft. (950 35 N m). 8. Install cover assembly (7) and the tube assembly as a unit.