hitachi — ASSEMBLE BRAKE VALVE

UNDERCARRIAGE / Travel Device Assemble Brake Valve 1. Install spool (4) approximately half way into valve housing (6). 2. Install O-ring (2), spring (3) and stopper (5) to plug (1) at one side. Install plug (1) at one side to valve housing (6). Tighten plug (1) by hand. 3. Install O-ring (2), spring (3) and stopper (5) to plug (1) at other side. Install the plug (1) assembly to valve housing (6). Tighten plug (1) by hand. 4. Tighten plug (1) on both sides by using a spanner. 7. Install O-rings (11) (2 used) to relief valves (12) (2 used). 8. While pushing poppets (9) (2 used) which were installed at step 6, install relief valves (12) (2 used) to valve housing (6) while pushing poppet (9). :

441 N m (45 kgf m, 325 lbf ft) IMPORTANT: Check the direction to install spool (16). 9. Install spool (16) to valve housing (6) with the hole end facing to the front. 10. Insert spring (15) into valve housing (6). 11. Install O-ring (14) to plug (13). Install plug (13) to valve housing (6). : 41 mm : 343 N m (35 kgf m, 253 lbf ft) 5. Install O-ring (8) to plug (7). Install plug (7) to valve housing (6). : 41 mm : 34 N m (3.5 kgf m, 25 lbf ft) 6. Install springs (10) (2 used) to poppets (9) (2 used). Install poppets (9) (2 used) in the hole of valve housing (6) completely. : 6 mm : 6 mm : 34 N m (3.5 kgf m, 25 lbf ft) NOTE:

If poppet (9) is installed into the farthest end, spring (10) may come off on the way. W3-2-31