TM 9-2350-256 -34-1 NOTE Ohmmeter   shall   read   "0"   ohms   with   no hydraulic   pressure   applied.   If   ohmmeter does  not  read  “0”,    replace   the   pressure switch and perform the test and adjustment procedure on a new pressure switch. (b)  Actuate  pump  and  slowly  raise  pressure to  235  ±  3  psi  while  watching  ohmmeter.  The pressure  switch  should  open  (ohmmeter  reads  in- finity) at this pressure. If it does not or if it opens before this pressure is reached, adjust the pressure siwtch  as  instructed  in  paragraph  3-63(3). (c) Slowly relieve pressure until switch closes (ohmmeter  reads  “0”).  The  pressure  gage  should read 221 ± 8 psi at this point, If it does not, replace switch  and  perform  the  test  and  adjustment procedure on a new pressure switch. (d) Again raise the pressure slowly to 235 ± 3 psi to check repeatability of switch. It should open again  at  this  pressure.  If  it  does  not,  replace  the switch  and  perform  the  test  and  adjustment procedure on a new pressure switch. (e)   Relieve   pressure,   disconnect   test equipment and install pressure switch (TM 9-2350- 256-20) . (3) Adjustment.   Refer  to  paragraph  3-63b(1) and (2). (a)  Pressure  switch  has  not  opened  when  a pressure  of  235  ±  3  psi  is  reached. 1 Loosen switch setscrew and apply 235 psi hydraulic   pressure. 2 While  maintaining  pressure  at  235  psi, slowly turn switch adjustment screw coun- terclockwise  until  the  ohmmeter  reads  infinity.  If switch  cannot  be  adjusted  in  this  manner,  replace switch  and  perform  the  complete  test  and  ad- justment  procedure  on  a  new  pressure  switch. 3 Test action of switch by performing steps (c)  and  (d)  of  the  test  procedure  above. 4 Tighten switch   setscrew, relieve pressure,    disconnect   test   equipment   and   install pressure switch (TM 9-2350-256-20). (b) Pressure switch opens before a pressure of 235  ±  3  psi  is  reached. 1 Loosen switch setscrew and apply 235 psi hydraulic   pressure. 2  While  maintaining  pressure  at  235  psi, slowly turn switch adjustment screw clockwise until ohmmeter reads “0”. If the ohmmeter does not read "0" when the adjustment screw is turned fully clock- wise, replace switch and perform the complete test and adjustment procedure on a new. switch. 3  Very  slowly  back  off  the  adjustment screw  (turn  counterclockwise)  until  the  ohmmeter reads infinity. 4  Test  action  of  the  switch  by  performing steps  (c)  and  (d)  of  the  test  procedure. 5   Tighten   switch   setscrew,   relieve pressure, disconnect   test   equipment   and   install pressure  switch  (TM  9-2350-256-20). 3-64. Spade Subplate and Control Valve Assembly a. Removal. Refer to paragraph  2-46f for removal and installation instructions. b. Repair.  Refer  to  TM  9-2350  -256-34-2  for  in- spection and repair instructions. 3-65. Flow Regulating Subplate Assembly a. Removal. Refer to paragraph 2-46h for removal and installation instructions. b.  Repair.  Refer  to  TM  9-2350  -256-34-2  for  in- spection and repair instructions. 3-66. Main Winch Motor a. Removal.  Refer to paragraph 2-26 for removal and installation instructions. b.  Repair.  Replace  the  motor  if  it  is  defective. 3-67. Hoist Winch Motor a. Removal.  Refer to paragraph 2-37 for removal and installation instructions. b.  Repair.  Replace  the  motor  if  it  is  defective. 3-68.  Boom  and  Stayline  Actuating  Cylinder Assemblies and Stayline Actuating Cylinder Crank Arms a. Removal.  Refer to paragraph 2-29 for removal and installation instructions. b.  Repair.  Replace  cylinders  and  crank  arms  if they are defective. 3-69.  Main  Hydraulic  Pump  Unloading  Valve a. Removal.  Refer to paragraph 2-34 for removal and installation instructions. b.  Repair.  Replace  the  valve  if  it  is  defective. 3-70.  Hoist  Winch  Counterbalance  Valve a. Removal.  Refer to paragraph 2-36 for removal and installation instructions. b.  Repair.  Replace  the  valve  if  it  is  defective. 3-71. Main Winch and Hoist Winch Brake Cylinders a. Removal,  Refer to paragraph 2-38 for removal and installation instructions. b.  Repair.   Replace   the   cylinders   if   they   are defective. 3-72. Hydraulic System Oil Filter a. Removal.  Refer to paragraph 2-41 for removal and installation instructions. b. Repair. Replace the filter if it is unserviceable. 3-73. Hydraulic Oil Tank Strainer (Filter ) a. Removal.  Refer to paragraph 2-42 for removal and installation instructions. 3-48