UPPERSTRUCTURE / Pilot Valve Disassemble Travel Pilot Valve IMPORTANT: Casing (23) is made of aluminium. Too strong a force can deform or damage them. Be careful while handling them. IMPORTANT: Spool (24) has been selected to match the hole of casing (23). Indicate the port number from which it is removed. Port numbers are stamped on the outer surface of casing (23). 1. Clamp casing (23) in a vise. Remove bolts (1) (2 used). Remove cover (2) from holder (7). IMPORTANT: The quantity of shim (27) has been determined during the performance testing at the factory. Keep the shim together with the spool. 6. Push balance spring (18).
Remove spring guides (17) (4 used), balance springs (18) (4 used), shims (27) (12 used) and spacers (26) (4 used) from spools (24) (4 used). 7. Remove return springs (25) (4 used) from casing (23). : 10 mm 2. Remove bolts (30) (2 used) and spring washers (29) (2 used). Remove the holder (7) assembly from casing (23). : 8 mm 3. Pull out the pusher (16) assemblies (4 used) from casing (23). 4. Remove pushers (16) (4 used) from bushings (15) (4 used). By using a bamboo spatula, remove oil seals (28) (4 used) and O-rings (14) (4 used) from bushings (15) (4 used). IMPORTANT: Put the mark on spools (24) (4 used) in order to easily install spool (24) into the original hole. 5.
Turn and remove the spools (24) assemblies (4 used) from casing (23). Spring guides (17) (4 used), balance springs (18) (4 used), shims (27) (12 used) and spacers (26) (4 used) are removed with spools (24) (4 used) together. NOTE: Spool (24) has been selected to match the hole of casing (23). Replace spool (24) and casing (23) as an assembly. W2-7-27