TM 10-3930-659-34 4-64. MAIN HYDRAULIC PUMP REPAIR (Con’t). a.           DISASSEMBLY 1. Mark front cover (2), main hydraulic pump body (17), and rear cover (13) to aid during assembly. 2. Remove two bolts (11) and washers (12) from rear cover (13). 3. Remove two nuts (9) and washers (8) from studs (7). NOTE Note position of thrust plate and channel seal to aid during assembly. 4. Hold together main hydraulic pump body (17) and rear cover (13), and separate front cover (2), thrust plate (4), and channel seal (3) from main hydraulic pump body.  Discard channel seal and thrust plate. 5. Remove seal (1) from front cover (2).  Discard seal. 6. Remove drive shaft (5) and idler gear (6) from main hydraulic pump body (17). NOTE Note position of thrust plate and channel seal to aid during assembly. 7. Remove main hydraulic pump body (17), thrust plate (15), and channel seal (14)  from  rear  cover  (13).    Discard channel seal and thrust plate. 8. Remove two seals (16) from main hydraulic pump body (17).  Discard seals. 9. Remove two studs (7) and seal (10) from rear cover (13).  Discard seal. b.          CLEANING AND INSPECTION WARNING Dry cleaning solvent, P-D-680, is toxic and flammable.  Always wear protective goggles and gloves, and use  only  in  a  well-ventilated  area.    Avoid  contact  with  skin,  eyes,  and  clothes,  and  DO  NOT  breathe vapors.    DO  NOT  use  near  open  flame  or  excessive  heat.    The  solvent's  flash  point  is  1000F-138°F (380C-590C).  If you become dizzy while using cleaning solvent,  immediately  get  fresh  air  and  medical help.  If solvent contacts eyes, immediately wash your eyes and get medical aid. 1.    Clean metal parts with dry cleaning solvent and dry with clean rags. 2.    Inspect parts for cracks, wear, and damage.  Replace damaged main hydraulic pump. 3.    Inspect  front  cover  and  rear  cover  bushings  for  wear  and  excessive  scoring.    Replace  main  hydraulic  pump  if bushings are damaged. 4-258