11
9. Install dowel pin (37) in front flange (2).
10. Install O-ring (40) in face of front flange (2).
11. Install square housing (4) on shaft (6) and slide it up until it engages dowel pin (37) and counterbore in front flange
(2) and is tight up against front flange face (2).
12. Install key (13) chamfer side up in keyway of shaft (6) inside square housing (4).
Note: If key (13) has a step, install key (13) with step facing up and toward square housing (4).
CAUTION
ATTENTION
When key (13) is installed and pushed up toward drive end, there must be an
approximately .020" gap between it and face of square housing (4). If not, it should be
removed and a small step filed in portion of key (13) that sticks above shaft (6) keyway.
This will prevent key (13) from touching face of square housing (4).
13. Install pinion gear (11) on shaft (6). Pinion gear (11) should slide freely on shaft (6) and key (13). If not,
ensure key (13) is properly installed and shaft (6) and pinion (11) keyway are free of burrs. Ensure pinion (11) is
installed in stage from which it was removed and is facing direction from which it was removed.
CAUTION
ATTENTION
If gears are installed in wrong housing, pump may not perform properly or may seize
during operation. This is because gears are matched to each housing individually and may
not have correct clearances if installed in another housing. If gears are installed facing
wrong direction, pump may not perform properly or may seize during operation. This is
because some gears have chamfers on only one side. These chamfers must be positioned
facing inside of housing so that there will be no interference with housing radii.
14. Install ring gear (12) in square gear housing (4). Ensure ring gear (12) is installed in stage from which it was
removed and is facing direction from which it was removed.
CAUTION
ATTENTION
If gears are installed in wrong housing, pump may not perform properly or may seize
during operation. This is because gears are matched to each housing individually and may
not have correct clearances if installed in another housing. If gears are installed facing
wrong direction, pump may not perform properly or may seize during operation. This is
because some gears have chamfers on only one side. These chamfers must be positioned
facing inside of housing so that there will be no interference with housing radii.
15. Install O-ring (41) on square gear housing (4).
16. Install dowel pin (37) in square gear housing (4).
NOTE:
If front pump of double pump is single stage pump, procede to step 26 to complete assembly. If front
pump is multiple stage pump, continue with step 17.
17. Install housing tube (8) on front counterbore of square housing (4).
18. Install O-ring (41) on back counterbore of round gear housing (3).
19. Install round housing (3) on shaft (6) and slide it on until it engages pin (37) in face of square housing (4) and is
tight up against face of square housing (4).
20. Install key (13) chamfer side up in keyway of shaft (6) inside round housing (3).
NOTE:
If key (13) has a step, install key (13) with step facing up and toward round housing (3).
