DECKMASTER MOUNTING THE NEW HARDWARE •1. Re-check   the   series   number   on   the   control feedback link to ensure that it is compatible with the  pump.    If  the  control  is  In  MCV106AX9XX (i.e.,  control  less  linkage  assembly),  follow  the procedure outlined below to install the linkage: A. Unscrew  the  bushing,  using  care  not  to damage its O-ring.  See Figure 6. B. Install   the   new   linkage   assembly   shaft through   the   swashplate   feedback   shaft hole.    Place  the  ball  in  the  crosslink  ball cavity. C. Lubricate the shaft O-ring and replace the bushing   over   the   shaft.      Torque   to   the body    (10-15    foot-pounds)    so    that    the feedback shaft extends through the bushing. D. Install  the  retaining  ring  in  the  groove  on the shaft. •2. Align one end of the replacement drag link with the holes in the swashplate link arms. •3. Insert  the  press  fit  pin  through  the  case  drain port   to   trap   the   drag   link   in   the   swashplate clevis.    It  will  be  necessary  to  tap  the  pin  into place  until  the  head  of  the  pin  is  flush  to  the clevis •4. Install  the  retaining  ring  by  forcing  it  onto  the tapered   end   of   the   pin   until   it   locks   into   the recess on the pin shaft.  Again, use caution not to drop any components into the pump housing. •5. One .042 inch diameter orifice must be installed in   the   supply   passage   on   pressure   override- compatible valves.  (See Ordering Information.) For all others.  a .042-inch diameter orifice may be  installed  in  the  supply  passage  if  reduced swashplate response is desired. •6. Engage  the  pin  on  the  control  in  the  drag  link and   swing   the   control   into   place   against   the pump housing.  The drag link should be on the cylinder block side of the swashplate.  Install the seven   mounting   screws   and   tighten   to   10-11 footpounds of torque. •7. Connect   the   pipe   or   tubing   from   the   control handle  into  the  C1  and  C2  ports  (9/16-18  UNF threads per SAE J514}.  Phasing of the HDC is such that a pressure rise at the C2 port causes a pressure  rise  at  the  A  output  port  of  the  pump, given   a   clockwise pump   prime   mover rotation as viewed into the input shaft. PUMP NEUTRAL ADJUSTMENT USE THE FOLLOWING PROCEDURE TO BRING THE PUMP TO NEUTRAL ONCE THE HYDRAULIC DISPLACEMENT CONTROL HAS BEEN MOUNTED. •1. Install a 300 psi gauge into the charge pressure gauge port on the pump.  See Figure 7. •2. Using a 9/16-inch wrench.  loosen the hex lock nut on the null adjustment screw.  See Figure 1. To  adjust  neutral  requires  operating the pump.  Take the necessary safety precautions such as having necessary    personnel    stand    away from  the  machine  Maximum  system pressure  may  occur  upon  start  up, and the machine may move.  Ensure that the operator is not in a position to   be   injured   should   the   machine move. •3. Set     the     hydraulic     control     handle     to neutral. •4. Start the prime mover and run at low idle. •5. Warm  the  system  up  for  several  minutes to bleed air. •6. Slowly increase the prime mover speed to rated rpm. FIGURE 7.   Location of pump ports. PUMP NEUTRAL ADJUSTMENT