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TM 5-2420-222-34 14-12. ACKHOE BOOM AND SWING VALVES REPAIR (Con’t). d. ASSEMBLY NOTE Boom  valve  has  only  one  anti-cavitation  detent  plunger;  swing  valve  has  two. Repeat  steps    1  through  3  as  required  to  remove  second  anti-cavitation  detent plunger. 1. Position spring (25) in detent plunger (24) and coat parts with hydraulic fluid. 2. Place  valve  body  (2)  in  vise  with  caps.    Install  detent plunger (24) and spring (25) in valve body. 3. Coat  new  preformed  packing  (26)  with  hydraulic  fluid. Install  plug  (27)  and  preformed  packing  in  valve  body (2). 4. Remove valve body (2) from vise. 5. Coat two new preformed packings (23) and new backup washers   (22)   with   hydraulic   fluid.      Install   preformed packings and backup washers in valve body (2). 6. Install  two  backhoe  boom  or  swing  valve  relief  valves from valve body (2) (see paragraph 14-13). 7. Coat new preformed packing (21) with hydraulic fluid and install in place on spool plug (3). NOTE Ensure that sealing surfaces are clean before applying thread sealing compound to spool plug. 8. Apply thread sealing compound to threads of spool plug (3). 9. Wrap valve (4) in clean rag and place in vise.  Install spool plug (3) and preformed packing (21) in valve. 10. Install two fluid flow restrictors (18) in place on two springs (19). 11. Coat two fluid flow restrictors (18) and two springs (19) with hydraulic fluid and install in place in valve (4). TA701594 14-64

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