UPPERSTRUCTURE / Pilot Valve Disassemble Positioning Pilot Valve 1. Remove boot (3) from holder (4). 2. Secure the pilot valve in a vise. Loosen set screw (17). Remove pin (15) from cam (1) by using a round bar. Remove the cam (1) assembly from holder (4). : 3 mm IMPORTANT: Record the positions of casing (10) and holder (4). The pusher (14) assembly may fly out due to return springs (7) (2 used). 3. Loosen and remove socket bolts (2) (2 used) alternately. Remove holder (4) and the pusher (14) (2 used) assembly from casing (10). : 6 mm 4. Remove bushings (12) (2 used), O-rings (11) (2 used) and oil seals (13) (2 used) from pushers (14) (2 used). IMPORTANT:
Indicate the port number in order not to confuse. 5. Remove the spool (9) assemblies (2 used) and return springs (7) (2 used) from each port of casing (10). 6. Compress balance springs (6) (2 used). Remove spring guides (5) (2 used) and balance springs (6) (2 used) from spools (9) (2 used). Remove spacers (8) (2 used) from spools (9) (2 used). W2-7-37