ARMY TM 5-6115-612-34 NAVY AG -320B0-MME-000 7-4. OIL PUMP.  Maintenance of oil pump (Figure 7- 5) consist of replacement and repair. a. Removal. (1) Loosen turnlock fasteners and remove engine housing access cover. NOTE DO NOT remove shouldered driveshaft   (16)   prior   to   oil   pump disassembly if shouldered quill shaft (13) rotates freely by hand. (2) Remove lockwire, bolts (1) and washer (2).        Carefully    remove    oil    pump    assembly    (3)    and performed packings (4 and 5) from gearbox. (3) Remove  capscrews  (6)  from  housing cover  (7).    On  housing  cover  (7),  insert  two  1-1/2  inch (3.81 cm) socket head capscrews into the holes provided to be used as jackscrews.  Alternately tighten jackscrews to   separate   cover   from    oil    pump    housing    (23).        If damaged, remove helical coil inserts (8). NOTE Housing   cover   (7)   and   oil   pump housing  (23)  come  as  a  matched set. (4) Remove     idler     spur     gear     (9) and preformed packing (10) from idler shaft (11). (5) Remove idler shaft (11) from oil pump housing (23). (6) Lift pump spur gear (12) off shouldered quill shaft (14). (7) Remove drive pin (13) from shouldered   quill   shaft   (14).      Remove   shouldered   quill shaft. (8) Remove    shouldered    quill    shaft    (14) from shouldered drive shaft (21). (9) Remove  bolts  (15),  washers  (16),  and housing access cover (17) from front of oil pump housing (23). (10)  Remove  performed  packing  (18)  from housing access cover (17).  Discard packing. (11)  If damaged, remove helical coil inserts (19) from oil pump housing (23). (12)  Pressing  on  back  of  shouldered  drive shaft (21), remove retaining ring (20). (13)  Remove   shouldered   drive   shaft   (21) from oil pump housing (23). (14)  Remove  performed  packing  (22)  from oil pump housing (23).  Discard packing. b. Repair.          Repair     of     the     oil     pump     is accomplished by replacing damaged parts. c. Installation. NOTE All parts, excluding preformed packings, should be rinsed in clean alcohol before assembly. (1) Install performed packing (22) in housing (23).  Discard packing. (2) Carefully  place  shouldered  drive  shaft (21) in housing (23). (3) Pressing  on  back  of  shouldered  drive shaft (21) and install retaining ring (20). (4) If    removed,    install    new    helical    coil insert (19) in oil pump housing (23). Change 4  7-7