Service manual

11
18. Install square housing key (21), chamfer side up, into keyway of shaft (6).
CAUTION
ATTENTION
If key (21) has a step, install key (21) with step facing up and away intermediate cover (5) face.
CAUTION
ATTENTION
When key (21) is installed there must be an approximately .020" gap between it and
intermediate cover (5) face. If not, key (21) should be removed and a small step filed in the
portion of the key (21) that sticks up above the shaft keyway to prevent the key (21) from
touching the side plate (56) in the intermediate cover (5) face.
19. Install square housing pinion gear (19) on shaft (6). Pinion gear (19) should slide freely on shaft (6) and key
(21).
If not, ensure key (21) is properly installed and shaft (6) and pinion (19) keyway are free of burrs. Ensure
pinion (19) 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 (20) in square gear housing (7). Ensure ring gear (20) is installed in housing (7) 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.
21. Install square gear housing (7), with installed ring gear (20), onto shaft (6). Ensure dowel pin (37) engages
dowel pin hole in intermediate flange (5) and pinion gear (19) installed on shaft (6) is properly positioned to
enter gear housing (7).
22. Install capscrews (39) 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 (39) torqued to full value, pump shaft must turn freely by hand and without significant
internal snagging. Otherwise, unit has not been properly assembled.
23. Install dowel pin (22) in back of housing (7).
24. Install O-rings (10) on housing tube and housing tube (23) on back of housing (7)
25. Install O-ring (40) on square housing (62). Install square housing (62) on shaft (6) and slide it up until it
engages dowel pin (22) and housing tube (23) and is tight up against back of previous housing (7).