TM10-3930-660-34 16-3.  TANDEM GEAR PUMP - REPAIR (Cont’d) CAUTION If  parts  are  difficult  to  fit  during  assembly,  tap  with  a  soft hammer.  Use care to prevent part damage. c. Ensure  that  dowel  pins  (20)  are  in  place.    Install bearing  carrier  (18)  onto  gear  housing  (21).  Align dowel   holes   over   dowel   pins   (20).      Use   a   soft hammer to tap parts together. d.  Install connecting shaft (22) in spline of drive gear (27). 4.    INSTALL  GEAR  HOUSING  (6)  AND  OTHER  PARTS  (7- 16, 19). a. Apply grease on two new seals (19).  Install seals (19) into grooves on gear housing (6). CAUTION If parts are difficult to fit during assembly, tap with a soft hammer.  Use care to prevent part damage. b. Ensure  that  dowel  pins  (17)  are  in  place.    Install gear  housing  (6)  onto  bearing  carrier  (18).    Align dowel   holes   over   dowel   pins   (17).   Use   a   soft hammer to tap parts together. Use care to prevent damage to seals (31). c. Install new seals (14), (15), and (16) into grooves in thrust  plate  (13)  with  flat  side  of  seal  (14)  facing away from thrust plate. d. Install drive gear (11) driven gear (12) into bearing carrier (15).  Ensure that gears are in contact with thrust plate (13) face. e. Install new seals (8), (9), and (10) into grooves in thrust plate (7) with flat side of seal facing away from thrust plate. f. Install thrust plate (7) with seals over gears (11 and 12).  The flat side of seal (8) should be facing up with relief groove facing outlet side. 16-17