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Figure  2-49.1  Valve  Actuator  Lower  Section
Internal  parts  of  the  actuator

TM-10-4610-232-34 Water Purification Unit Reverse Osmosis 3 000 GPH Trailer Mounted Flatbed Cargo 22-1/2 Ton 8 Wheel Tandem Model No. WTA-060 Manual
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REPAIR REASSEMBLY TM   10-4610-232-34 a.  Replace  all  damaged,  missing,  or  unserviceable  parts. b.  Replace  damaged  preformed  packing  and  snap  rings. a.  Lubricate  and  install  O-ring  (24)  onto  piston  (23). b.  Lubricate  and  install  two  bearings  (19)  onto  cylinder  (4)  and  two  bearings  (18)  onto  drive  assembly  (15). c. Lubricate and install thrust bearing (13) into drive assembly (15). Place thrust drive (12) onto top of thrust bearing. d.  Lubricate  and  install  O-ring  (17)  onto  drive  assembly  (15). e.  Install  thrust  bearing  (16)  into  bottom  of  actuator  cylinder  (4). CAUTION Damage to smooth surface of rising stem (1) will cause the actuator to fail. When removing the rising stem do not scar the smooth surface of the stem. Use flat surfaces near top of the stem at  threads  at  the  wrench  gripping  area. f.  Assemble  rising  stem  (1),  gasket  (22),  lock  washer  (21),  and  nut  (20)  onto  piston  (23). g.  install  vee  packing  (8)  and  seal  retainer  (7)  onto  mounting  adapter  (2)  and  rising  stem  as  follows: (1) Cover  the  threads  of  rising  stem  (1)  with  tape. (2) Slide  the  vee  packing  (8)  over  the  rising  stem  (1)  with  the  "V”  side  facing  down  (toward  the  piston). (3) Partially  insert  the  vee  packing  (8)  into  the  smallest  counter  bore  on  the  top  of  the  mounting  adapter  (2) using a flat tool to assist the outer lip of the vee packing. (4) Slide  the  retainer  seal  (7)  over  the  rising  stem  (1)  and  onto  the  vee  packing  (8). (5) Complete  the  installation  of  the  vee  packing  (8)  by  pushing  the  seal  retainer  (7)  into  place. (6) Remove  masking  tape  from  rising  stem  (1). h.  Place  inner  spring  (11)  and  outer  spring  (10)  into  drive  assembly  (15). CAUTION Damage  to  the  actuator  will  occur  or  the  actuator  will  not  function  properly  if  the  internal bearings are not correctly aligned. Be sure that all bearings on the drive assembly are aligned  with  the  grooves  on  the  sides  of  the  piston. i.  Before  pressing  piston  assembly  (6)  and  mounting  adapter  (2)  into  the  actuator  cylinder  (4),  the  bearings  in  the cylinder and on the drive assembly (15) must be properly aligned with the grooves in the piston (23). To align bearings,  do  the  following: (1) Look  inside  the  cylinder  and  mark  the  outside  surface  of  the  cylinder  to  indicate  the  locations  of  center  line bearings  (19)  inside  the  cylinder. (2)  Place  the  piston  assembly  (6)  onto  the  inner  and  outer  springs  (11)  and  (10)  which  have  been  placed  into drive  assembly  (15). (3) Align the vertical bearing groove of the piston (23) with the mark made on the outside of the cylinder in step (1). (4) Place another mark on the outside surface of cylinder (4) to indicate where the centerline of the curved bearing  groove  is  when  the  vertical  groove  is  aligned  with  the  mark  made  in  step  (1). (5)  Remove  the  piston  assembly  (6)  from  the  cylinder  (4). (6)  Rotate  the  drive  assembly  (15)  inside  the  cylinder  (4)  until  the  bearings  on  the  drive  assembly  line  up  with the  mark  made  on  the  outside  of  the  cylinder  in  step  (4)  to  align  the  bearings  on  the  drive  assembly  with  the  curved groove  of  the  piston. Change  3 2-168.3







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