HYDRAULICS 1.93 Servicing Servicing is normally restricted to the replacement of seals. When the bore of the housing or the cylinder is scored, the valve must be replaced. Dismantling 1. Make sure all the blanks are secure in the ports then clean any dirt off the assembly before dismantling. 2. Remove cap screws (17) securing base (16) to housing (11). 3. Remove sleeve (15), spool (13) and ball (12). Separate spool (13) from sleeve (15). NOTE: Take care not to scratch or damage sleeve (7) or housing (11) bore. The sleeve (7) and spool (9) are a matched pair and must not be mixed with other parts. Excessive wear on sleeve or spool will require replacement. 4.
Remove O-rings (14*) from sleeve (15). 5. Loosen nut (1) and remove end plug (4) from housing (11) bore. Remove spring (5), nut (1), washer (2) and O-ring (3*) from end plug (4). 6. Use a wooden dowel to remove spacer (10), sleeve (7) and spool (9) assembly from housing (11) bore. 7. Separate spacer (10) and spool (9) from sleeve (7). 8. Remove O-rings (6*) and (8*) from sleeve (7). NOTE: Take care not to damage O-ring grooves or sleeve. 1. Nut 10. Spacer 2. Washer 11. Housing 3*. O-ring 12. Ball 4. End plug 13. Spool 5. Spring 14*. O-ring 6*. O-ring 15. Sleeve 7. Sleeve 16. Base 8*. O-ring 17. Cap screw 9. Spool * Included in repair kit