CYLINDER & SEAL GP-LIFT 7V5517 - Caterpillar

1. Disconnect electrical connectors (1) and (2) from brake accumulator charging valve assembly (3). 2. Disconnect hose assemblies (4), (5), (6), (7) and (8) from brake accumulator charging valve assembly (3).3. Remove the two bolts and washers that hold brake accumulator charging valve assembly (3) to the rear frame. Remove the charging valve assembly. The following steps are for the installation of the brake accumulator charging valve assembly.4. Position the brake accumulator charging valve assembly as shown. Install the two bolts and washers that hold brake accumulator charging valve assembly (3) to the rear frame.5. Connect hose assemblies (4), (5), (6), (7) and (8) to brake accumulator charging valve assembly (3).6. Connect electrical connectors (1) and (2) to brake accumulator charging valve assembly (3).7. Fill the hydraulic oil tank with oil to the correct level. Refer to R1300 L.H.D. Operation & Maintenance Manual, Form No. SEBU7321 (9EL9617) for the correct filling procedure.8. Bleed the service brake. Refer to Remove Air from the Braking System, R1300 L.H.D. Braking System, Systems Operation, Testing & Adjusting, Form No. RENR4608 (9EL9607).End by:a. Remove steering frame lock pin.Disassemble Brake Accumulator Charging Valve
Start by:a. Remove brake accumulator charging valve. 1. Remove plugs (1) and (2). 2. Remove plunger (3), piston (4), spring (5) and O-ring seal (6) from plug (2).3. Remove two springs (7), two pistons (8) and spool (10). Remove two O-ring seals (9) from spool (10). Remove O-ring seal (11) from plug (1). 4. Remove plugs (12) and (13). 5. Remove piston (14), ball (15), plunger (16) and spring (17) from under plug (13). Remove O-ring seal (18) from plug (13).6. Remove spool (20), spring seat (21) and springs (22) and (23) from under plug (12). Remove O-ring seal (24) from plug (12). Remove O-ring seal (19) from spool (20). 7. Remove plugs (25) and (31). Remove set screw (27), spring (28), plunger (29) and ball (30) from under plug (25). Remove O-ring seal (26) from plug (25). Remove O-ring seal (32) from plug (31). 8. Remove plug (33) and O-ring seal.9. Remove valve (34). 10. Remove O-ring seal (35) from valve (34). Remove O-ring seal (37) and back-up ring (36) from valve (34).Assemble Brake Accumulator Charging Valve
1. Be sure all parts of the brake accumulator charging valve are thoroughly clean and free of dirt and debris prior to assembly. Check the condition of all O-ring seals. If any of the seals are worn or damaged, use new parts for replacement. 2. Install O-ring seal (4) and back-up ring (3) on valve (1). Install O-ring seal (2) on valve (1). 3. Install valve (1).4. Install plug (5) and O-ring seal. 5. Install O-ring seal (13) on plug (12). Install O-ring seal (7) on plug (6). Install ball (11), plunger (10), spring (9) and set screw (8) under plug (6). Install plugs (6) and (12). 6. Install O-ring seal (21) on spool (22). Install O-ring seal (26) on plug (20). Install spool (22), spring seat (23) and springs (24) and (25) under plug