S237-SA (en)
Page 7 of 8
20. Using a water seal cap spanner wrench, unscrew
and remove the Water Seal Cap Assembly.
21. Withdraw the Seal Spacer (35).
22. The lower Shaft Bearing (33) can usually be
pushed from the Housing with a wooden dowel.
However, if the Water Seals were badly worn so
that water got into and around the Bearing, it
may be necessary to forcibly drive the Bearing
from the Housing. If this is the case, make certain
you have a new Bearing on hand for installation.
ASSEMBLY
General Instructions
1. Always press on the inner ring of a ball-type bear-
ing when installing the bearing on a shaft.
2. Always press on the outer ring of a ball-type
bearing when pressing the bearing in a bearing
recess.
3. Whenever grasping a part in a vise, always use
leather-covered or copper-covered vise jaws.
This is particularly true of threaded members and
housings.
4. Except for bearings, always clean every part, and
wipe every part with a thin film of oil before in-
stallation.
5. Check every bearing for roughness. If an open
bearing must be cleaned, wash it thoroughly in a
clean solution and dry with a clean cloth.
Sealed
or shielded bearings should not be cleaned.
6. Apply a film of O-ring lubricant to all O-rings be-
fore installation.
Assemble a S237-SA Pump as follows:
1. If the Water Seals (38) were removed from the
Water Seal Cap (37), install new Seals as follows:
a. Press the first Seal, lip side first, into the
Water Seal Cap until it bottoms against the
shoulder.
b. Press the second Seal, lip side trailing, into
the Water Seal Cap until the trailing edge of
the Seal is flush with the face of the Water
Seal Cap.
c. Insert the Impeller Spacer (39), beveled
end first, through both Seals until its beveled
end is flush with the threaded end of the Wa-
ter Seal Cap.
2. Install the lower Shaft Bearing (33) followed by
the Seal Spacer (35) in the bottom of the Housing
(14) until the Bearing seats against the Housing
Snap Ring (36).
3. Using a water seal cap spanner wrench, install the
Water Seal Cap Assembly (37). Tighten the Water
Seal Cap to 20 to 25 ft-lb (27 to 34 N m) torque.
4. Grasp the large diameter end of the Rotor Shaft
(32) in leather-covered or copper-covered vise
jaws so that the small diameter end is upward.
5. Slide the Front End Plate (30), bearing recess first,
down over the Rotor Shaft.
6. Place the Rotor Key (28) in the keyslot in the Ro-
tor Shaft.
7. Slide the Rotor (27) down over the Rotor Shaft,
engaging the Rotor Key.
8. Place a Vane (29) in each vane slot.
9. Place the Cylinder (24), small dowel first, down
over the Rotor so that the small dowel engages
the alignment hole in the Front End Plate.
10. Place the Rear End Plate (23) over the Rotor Shaft
and against the Cylinder, so that it engages the
Cylinder Dowel (26).
11. Check the outside diameter and large inside di-
ameter of the Rotor Bearing Seal (19) for wear. If
the outside diameter of the hub is worn to 1.76”
(29.881 mm) or smaller, and/or the large inside
diameter is worn to 0.910” (23.122 mm) or larger,
install a new Rotor Bearing Seal.
NOTICE
Take all measurements 90 to the left
of the dowel hole when facing the hub side of the
Seal.
Install the Rotor Bearing Seal (19), flat side first, so
that the Cylinder Dowel engages the alignment hole
in the Bearing Seal.
12. Press the Rear Rotor Bearing (19) onto the hub of
the Controller (18).
13. Press the Controller Assembly into the hub side
of the Rotor Bearing Cage (21) until it is within
1/8” (3 mm) of seating.
NOTICE
The Rotor Shaft has a left-hand thread;
turn counterclockwise to install.
14. Using the No. 99V60-950 Controller Wrench, in-
stall the assembled Controller, Bearing and Cage
on the Rotor Shaft.
NOTICE
Tighten the Controller to 8 to 10 ft-
lb (10.8 to 13.5 Nm) torque. Do not exceed 10 ft-lb
(13.5 Nm) torque. The Controller may be damaged
if this torque is exceeded.
NOTICE
The Controller Retaining Nut has a
right-hand thread.
15. Install the Controller Retaining Nut (20). Tighten
the Nut to 6 to 9 in-lb (0.67 to 1.07 Nm) torque.
16. Remove the assembled motor from the vise.
17. Slide the upper Rotor Shaft Bearing (33) on the
large diameter end of the Rotor Shaft until it
seats against the shoulder on the Shaft.
18. Slide the Bearing Spacer (34) on the Rotor Shaft
until it contacts the Bearing.
19. Stand the Housing (14) upright on the work-
bench.
20. Place the two Motor Clamp Washers (31), concave
side first, in the bottom of the housing bore, so
that the outer rim of the leading Washer contacts
the Housing.
21. Install the assembled motor shaft end first into
the Housing until the Front End Plate seats
against the Motor Clamp Washers.
22. Place the Rear End Plate Gasket (22) on the face
of the Rear Rotor Bearing Cage, aligning the dow-
el hole in the Gasket with the Cylinder Dowel.
23. If the Oiler Body Assembly (2) was disassembled,
