Service manual

10
7. Install O-ring (40) onto seal housing (9) rabbet.
8. Install seal housing (9) in front flange (2) and secure with cap screws (42). Torque capscrews, with torque
wrench, to torque values on assembly drawing.
9. Install dowel pin (37) in front flange (2), if applicable.
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) and push it up as far as
possible toward drive end of pump.
CAUTION
ATTENTION
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 there must at least an approximately .020" gap between it and
housing (4) face. If not, it should be removed and a small step filed in the portion of the key (13)
that sticks up above the shaft keyway to prevent the key (13) from touching the housing (4)
face.
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 intermediate flange (5).
17. Install intermediate flange (5) onto shaft (6) and slide it on until its pin (37) engages pin in hole in face of
previously installed housing (4) and is tight up against face of previously installed housing (4).