HYDRAULICS 1.91 DUAL BRAKE VALVE (SAFIM) (10) - Servicing NOTE : From Machines S/No.51200472 only. Servicing is normally restricted to the replacement of seals in the brake master and brake valve modules of the valve assembly. When any cylinder bore or sliding contact surface is scored, the brake valve must be replaced. Dismantling (Brake Valve Module) 1. Remove the shuttle valves (11) and O-seal (10) from the brake valve module (8). 2. Remove the four O-seals (9) from the brake valve module (8). 3. Remove the two grub screws that retain the two valve assemblies into the brake valve module (8). 3.
Remove the circlips (1) and extract the plugs (12), sealing rings (2) and (4), O-seals (3) and (5), valves (6) and springs (7) from the brake valve module (8). 4. Clean and examine the valve module (8), shuttle valves (11), plugs (12) and valves (6) of the brake valve module (8). Assembly (Brake Valve Module) 1. Installation is the reverse of removal. 1. Circlip 2. Sealing ring 3. O-ring seal 4. Sealing ring 5. O-ring seal 6. Valve 7. Spring 8. Brake valve module 9. O-ring seal 10. O-ring seal 11. Shuttle valve 12. Plug 2. Make sure a new sealing rings (2) and (4) and O- ring seals (3), (5) and (9) are fitted. 3.
Before assembly, lightly lubricate the parts from the repair kit and the spool and sleeve with clean hydraulic oil. 4. Make sure all parts are clean before assembly.