10
17. Reinstall bearing retainer (70) onto bearing housing (9) with cap screws (75). Tighten capscrews with torque
wrench per assembly drawing torque values.
18. Install first stage key (13), chamfer side up, into keyway of shaft (6) and push it up as far possible toward drive
end of pump.
NOTE:
If key (13) has a step, install key (13) with step facing up and away from front cover (1).
If not, it should be removed and a small step filed in the portion of the key that sticks
above shaft keyway to prevent key (13) from touching front cover (1) face.
19. Install first stage 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.
20. Install ring gear (12) in first stage gear housing (3), or (4) if single stage (X1, X2) pump. Ensure ring gear (12) is
installed in stage from which it was removed and is facing direction from which it was removed, if pump has more
than one stage.
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.
21. Install O-ring (41) on first stage square gear housing (4) if single pump, or round gear housing (3) if multistage pump.
22. Install dowel pin (37) in front cover (1).
23. Install first stage gear housing (3), or (4) if single stage pump, with installed ring gear (12), onto shaft (6). Ensure
dowel pin (37) engages dowel pin hole in front cover (1) and pinion gear (11) installed on shaft (6) is properly
positioned to enter gear housing.
NOTE:
If pump is single stage model, proceed to step 39 to complete assembly. If multiple stage pump, continue
below with step 24.
24. Install O-ring (41) on back of first stage gear housing (3).
25. Install housing tube (8) on back of first stage gear housing (3).
26. Install second stage key (13), chamfer side up, into keyway of shaft (6).
NOTE:
If key (13) has a step, install key (13) with step facing up and away from back face of previous stage.
CAUTION
ATTENTION
When key (13) is installed and pushed up toward drive end, there must be a .020" gap
between it and back face of previous stage. If not, be sure the previous stage is seated
completely up into housing tube (8). If key (13) is still up against back face of previous
stage, it should be removed and a small step filed in the portion of the key that sticks above
shaft keyway, to prevent key (13) from touching back face of previous stage.
