Service manual

12
26. Install key (66) chamfer side up in keyway of shaft (6) inside square housing (62) and push it up as far as
possible toward drive end of pump.
CAUTION
ATTENTION
If key (66) has a step, install key (66) with step facing up and toward drive end of pump.
CAUTION
ATTENTION
When key (66) is installed there must be an approximately .020" gap between it and
housing (62) face. If not, it should be removed and a small step filed in the portion of
the
key (66) that sticks up above the shaft keyway to prevent the key (66) from touching
the housing (62) face.
27. Install pinion gear (64) on shaft (6). Pinion gear (64) should slide freely on shaft (6) and key (66). If not,
ensure key (66) is properly installed and shaft (6) and pinion (64) keyway are free of burrs. Ensure pinion (64)
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.
28. Install ring gear (65) in square gear housing (62). Ensure ring gear (65) 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.
29. Install O-ring (10) on square gear housing (62).
30. Install dowel pin (22) in square gear housing (62).
31. Install back cover (63) on shaft (6). Slide it on until it engages pin (22) in face of housing (62) and is tight up
against face of previously installed housing (62).
32. Install capscrews (17) and tighten with torque wrench to torque values on assembly drawing. Torque one half
value for all capscrews first, then torque full specified torque values. Capscrew tightening pattern should be
across opposite corners for both half torque and full torque tightening.
NOTE: With capscrews (17) torqued to full value, pump shaft must turn freely by hand and without significant
internal snagging. Otherwise, unit has not been properly assembled.
33. Install O-ring (67) into rear cover (15). If necessary, use a dab of grease to hold O-ring (067) in place.
34. Install rear cover (15) on back cover (63) using capscrews (38). Tighten capscrews (38) with torque wrench to
torque values on assembly drawing.