Ingersoll-Rand ARO S237-SA User manual

IMPORTANT SAFETY INFORMATION ENCLOSED.
READ THIS MANUAL BEFORE OPERATING PUMP.
It is the responsibility of the employer to place this information in the hands of the operator. Keep for future reference.
Failure to observe the following warnings could result in injury.
INSTRUCTION MANUAL S237-SA
RELEASED: 5-31-19
(REV: A)
INSTRUCTIONS FOR MODELS
S237-SA SUMP PUMPS
NOTICE
S237-SA is designed for construction and maintenance applications where
light weight, compactness, and low air consumption are prime factors. Ingersoll-Rand is not
responsible for customer modication of pumps for applications on which Ingersoll-Rand
was not consulted.
INGERSOLL RAND COMPANY LTD
209 NORTH MAIN STREET – BRYAN, OHIO 43506
[phone] FAX [phone] © 2019
arozone.com
PLACING PUMPS IN SERVICE
yAlways operate, inspect and maintain this pump in ac-
cordance with all regulations (local, state, federal and
country), that may apply to hand held/hand operated
pneumatic pumps.
yFor safety, top performance, and maximum durability of
parts, operate this pump at 90 psig (6.2 bar/620 kPa) max-
imum air pressure at the inlet with 3/4” (19 mm) inside
diameter air supply hose.
yAlways turn off the air supply and disconnect the air
supply hose before installing, removing or adjusting any
accessory on this pump, or before performing any main-
tenance on this pump.
yDo not use damaged, frayed or deteriorated air hoses and
ttings.
yBe sure all hoses and ttings are the correct size and are
tightly secured.
yAlways use clean, dry air at 90 psig maximum air pressure.
Dust, corrosive fumes and/or excessive moisture can ruin
the motor of an air pump.
yDo not lubricate pumps with ammable or volatile liquids
such as kerosene, diesel or jet fuel.
yDo not remove any labels. Replace any damaged label.
yThis pump is not designed for working in explosive atmo-
spheres.
yThis pump is not insulated against electric shock.
USING THE PUMP
yAlways wear eye protection when operating or perform-
ing maintenance on this pump.
yAlways wear hearing protection when operating this
pump.
yUse accessories recommended by Ingersoll-Rand.
yDo not start or operate this pump unless it is submerged.
NOTICE
The use of other than genuine Inger-
soll-Rand replacement parts may result in safety haz-
ards, decreased pump performance, and increased
maintenance, and may invalidate all warranties.
Repairs should be made only by authorized trained
personnel. Consult your nearest Ingersoll-Rand Au-
thorized service center.

Page 2 of 8 S237-SA (en)
WARNING
FAILURE TO OBSERVE THE FOLLOWING WARNINGS COULD RESULT IN INJURY.
WARNING
Important information contained in
Operation and Maintenance Manual
for safe tool operation.
This material must be read prior to
operating the tool.
WARNING
Always turn o the air supply and discon-
nect the air supply hose before installing,
removing or adjusting any accessory on
this tool, or before performing any main-
tenance on this tool.
90 psig
(6.2 bar/620kPa)
WARNING
Operate at 90 psig
(6.2 bar/620 kPa)
Maximum air pressure.
WARNING
Always wear eye protection when
operating or performing mainenance
on this tool.
WARNING
Do not use damaged, frayed or deterio-
rated air hoses and ttings.
WARNING LABEL IDENTIFICATION

S237-SA (en) Page 3 of 8
LUBRICATION
Ingersoll-Rand No. 50
Ingersoll-Rand No. 100
Before placing a Pump in service: Remove the Oil
Chamber Plug and fill the oil chamber in the Back-
head with oil. Inject about 3 cc of oil into the air inlet
before attaching the air hose.
After each four hours of operation, Unless an air
line lubricator is used, replenish the chamber in the
Backhead with oil.
The use of an air line lubricator is recommended
for lubricating the Pump motor.
After each forty hours of operation, or as experi-
ence indicates, pump 10 or 15 strokes of grease from
No. P25-228 Grease Gun into the Grease Fitting on
the Motor Housing.
Ingersoll-Rand Sump Pumps can be completely sub-
merged but a watertight exhaust conduit to the sur-
face of the sump liquid should be maintained at all
times.
Under no circumstance should hose smaller than
1” ID be used as it will restrict the exhaust and im-
pair the eciency of the Pump.
When pumping from a ditch or sump, set the Pump
on a board or flat stone or suspend it a few inches
o the bottom of the sump. The less mud, sand and
gravel pumped, the longer the Pump will last.
If the water is very dirty, protect the Pump by setting
it in a mesh basket, or screen it in by some other
method.
Should the Inlet become clogged, turn off the air
supply and disconnect the air supply hose and lift the
Pump from the water. Water running back through
the discharge hose will usually ush the dirt from the
Inlet.
IMPELLER ADJUSTMENT
For the most efficient operation of the Pump, par-
ticularly against high heads, it is necessary that the
clearance between the Impeller and the Impeller
Cover be limited. This clearance is set at 0.010” at
the factory. When, due to wear, this clearance has in-
creased to about 1/32”, an adjustment can be made
by removing enough of the Impeller Cover Shims
to obtain the original 0.010” clearance. This simple
adjustment will prolong the life of the Impeller and
maintain the high eciency of the Pump. The Impel-
ler Cover Shims are different colors to identify the
various thicknesses. White is 0.025”, pink is 0.015”,
brown is 0.010”, blue is 0.005”and green is 0.003”.
Impeller Shims are used as required between the
Impeller and the Impeller Spacer to provide running
clearance between the Impeller and the Housing.
When assembling Pump, install only enough Impel-
ler Shims to permit the Impeller to rotate without
any drag.
SPECIFICATIONS
Model Size of Opening
pump will pass through
Material of Pump
Housing Sound Level dB (A)
inches mm Piped away
Exhaust Non-Piped away Exhaust

Pressure

Pressure

Power
S237-SA 8-3/4 x 8-3/4 222 x 222 Cast Iron 74.9 104.4 117.4

Tested in accordance with ANSI SS.1-1971 at 100ft. (30.5m) of head (approximately 43.5 psig (3.0 bar / 300kPa) back pressure).

IS03744.
PLACING TOOL IN SERVICE
COMPRESSOR
REGULATORFILTER
COMPRESSOR
T
O PNEUMATIC TOOL
T
O PNEUMATIC SYSTEM
MAIN PIPES 3 TIMES
THE SIZE OF PNEUMATIC
TOOL ENTRY
RAMAL PIPE 2 TIMES
THE SIZE OF PNEUMATIC
TOOL ENTRY
PURGE
PERIODICALLY

Page 4 of 8 S237-SA (en)
1
5
4
2
6
7
17
22
20
18
21
19
2326
24
25
29
28
30
36
15
14 31
33
32
3
8
13
9 10
11
44
45
46
48
51
50
49
47
16
12
34
33
35
39
38
37
40
41
42
43
27
PART LIST

S237-SA (en) Page 5 of 8

To keep downtime to a minimum, it is desirable to have on hand certain repair parts. We recommend that you stock one (pair or set) of each part indicated by a
bullet (•) for every four tools in service.

Not illustrated.
PART LIST
Item Description (size) Qty Part No.
1Backhead Assembly (includes item 2, 7, 8,
9, 10 and 11) (1) S237-A102
2
Oiler Body Assembly
(includes item 3, 4, 5 and 6)
(1) 88HL60-A198
3 Oiler Body O-ring (Small) (1) 88L60-103
4 Oiler Felt (2) (1) R1-75
5 Oiler Adjusting Screw (1) R1-71A
6 Oiler Body O-ring (Large) (1) WFS182-210
7 Oiler Body Retainer (1) 88HL60-298
8 Oil Chamber Plug (1) R2-227
9 Air Strainer Screen (1) P25-61A
10 Air Strainer Cap (1) P25-268
11 Air Strainer Plug (1) P25-536
12 Backhead Lock Washer (4) 34U-58
13 Backhead Cap Screw (4) 834-638
14 Housing (1) S237-A240
15 Grease Fitting (1) 23-188
16 Housing Plug (1) R2-227
17 Housing Seal (1) P226-283A
18 Controller Assembly (1) 99V77-A524
19 Rotor Bearing Seal Assembly (1) 99V60-A28A
20 Controller Retaining Nut (1) G8-120A
21 Rotor Bearing Cage (1) 99V60-107A
22 Rear End Plate Gasket (1) 99V60-739
23 Rear End Plate (1) 99V60-A12
24
Cylinder Assembly (includes item 25 and 26) (1) 99V60-A3
25 End Plate Dowel (1) 5040-6
26 Cylinder Dowel (1) 502B-120
27 Rotor (1) 99V60-53
28 Rotor Key (1) R43F-70
29 Vane Packet (set of 4 Vanes) (1) 99V60-42-4
Item Description (size) Qty Part No.
30 Front End Plate (1) 99V60-11
31 Motor Clamp Washer (2) 99V60-207
32 Rotor Shaft (1) P226-204
33 Shaft Bearing (2) G57E-24
34 Bearing Spacer (1) P226-265
35 Seal Spacer (1) P226-100
36 Housing Snap Ring (1) S12-118
37 Water Seal Cap Assembly
(includes item 38 and 39) (1) P226-A115
38 Water Seal (2) P225-153
39 Impeller Spacer (1) P225-152
40
Impeller Shim (as required)
0.010” thick (1) P25-151-10
0.025” thick (1) P25-151-25
41 Impeller (1) P225-143
42 Impeller Retaining Washer (1) P225-157
43 Impeller Retaining Screw (1) P225-156
44
Impeller Cover Shim (as required)
0.005” thick (blue) (1) P225-145-5
0.010” thick (brown) (1) P225-145-10
0.015” thick (pink) (1) P225-145-15
0.025” thick (white) (1) P225-145-25
45 Impeller Cover (1) P225-144
46 Inlet (1) SPS-01118
47 Impeller Cover Lock Washer (4) P225-67
48 Impeller Cover Cap Screw (4) P225-146
49 Controller Wrench (1) 99V60-950
50 Seal Pressing Tool for Controller (1) 99V60-951
51 Bearing Clamp to release Controller (1) 99V60-A952
Nameplate (1) P25-99
Nameplate Screw (4) PS251-302

Page 6 of 8 S237-SA (en)
WARNING
Always wear eye protection while per-
forming maintenance on this pump. Always turn o
the air supply and disconnect the air supply hose
before installing, removing or adjusting any acces-
sory on this pump or before performing any main-
tenance on this pump.
LUBRICATION
Each time a S237-SA Sump Pump is disassembled for
maintenance and repair or replacement of parts, lu-
bricate the Pump as follows:
1. Remove the Oil Chamber Plug (8) and ll the oil
chamber in the Backhead (1) with Ingersoll-Rand
No. 50 Oil.
2. Before attaching the air hose, inject about 3 cc of
oil into the air inlet.
3. After each four hours of operation, unless an air
line lubricator is used, ll the oil chamber in the
Backhead with oil.
4. After each forty hours of operation, or as experi-
ence indicates, pump 10 or 15 strokes of Inger-
soll-Rand Water Pump Grease No. 80 into the
Grease Fitting (15) on the Motor Housing (14).
Use the No. P25-228 Grease Gun.
5. We recommend the use of Ingersoll-Rand No.
8LUB12 Lubricator located in the air supply line
as close to the Pump as practical. Keep the Lubri-
cator lled with Ingersoll-Rand No. 50 Oil.
AIR STRAINER
Periodically, clean the Air Strainer Screen (9) as fol-
lows:
1. Shut o the air supply to the Pump.
2. Unscrew the Air Strainer Plug (11).
3. If the Screen still appears clogged, unscrew the
Air Strainer Cap (10) and withdraw the Screen.
Clean the Screen in a suitable cleaning solution
in a well ventilated area.
DISASSEMBLY
General Instructions
1. Do not disassemble the Pump any further than
necessary to replace or repair damaged parts.
2. Whenever grasping a part in a vise, always use
leather-covered or copper-covered vise jaws to
protect the surface of the part and help prevent
distortion. This is particularly true of threaded
members and housings.
3. Do not remove any part which is a press t in or
on a sub assembly unless the removal of that part
is necessary for repairs or replacement.
Disassemble a S237-SA Pump as follows:
1. If the Air Strainer Screen (9) is to be cleaned or
replaced, unscrew the Air Strainer Cap (10) and
withdraw the Screen.
2. Unscrew and remove the Backhead Cap Screws
(13). Lift o the Backhead.
3. If the oiler is to be disassembled, remove the Oil-
er Body Retainer (7) and withdraw the Oiler Body
Assembly (2) from the Backhead.
4. Unscrew the Impeller Cover Cap Screws (48) and
remove the Inlet (46) and Impeller Cover (45).
5. Sprag the Impeller (41) against rotation by insert-
ing a long screwdriver through one of the suction
ports and into the discharge port in the Housing
(14).
6. Unscrew the Impeller Retaining Screw (43) and
remove the Impeller.
7. While grasping the Controller (18) in one hand,
gently tap on the impeller end of the Rotor Shaft
(32) with a plastic hammer and withdraw the mo-
tor from the Housing.
8. The upper Rotor Shaft Bearing (33) and Bearing
Spacer (34) usually come out with the motor.
Slide them o the Rotor Shaft.
NOTICE
The Controller Retaining Nut (20) has a
right-hand thread.
9. Grasp the Rotor Shaft vertically in copper-cov-
ered vise jaws, and unscrew the Controller Re-
taining Nut.
NOTICE
The Controller Assembly has a left-
hand thread.
10. Using the No. 99V60-950 Controller Wrench, un-
screw the Controller Assembly.
NOTICE
Do not attempt to disassemble the
Controller. It is available only as a unit.
11. Lift o the Rear End Plate Gasket (22).
12. Set the Bearing Cage (21) on blocks on an arbor
press. Using a metal sleeve that contacts only the
outer race of the Rear Rotor Bearing (19), press
o the Bearing Cage.
13. If it is necessary to remove the Rear Rotor Bear-
ing, insert the Rear Rotor Bearing into the No.
99V60-A592 Bearing Clamp and tighten the nut
on the fixture. Insert the No. 99V60-951 Seal
Pressing Tool in the center.
14. Lift o the Rotor Bearing Seal (19) and Rear End
Plate (23).
15. Lift o the Cylinder (24).
16. Remove the Vanes (29).
17. Withdraw the Rotor (27) and lift out the Rotor Key (28).
18. Lift o the Front End Plate (30).
19. Remove the Motor Clamp Washers (31).
NOTICE
The Water Seal Cap Assembly (37) has
a left-hand thread. Do not remove the Water Seals
(38) from within the Water Seal Cap unless you
have two new Seals on hand for installation. The
Water Seals are always damaged during the remov-
al process. Always check the Water Seals for wear or
leakage.
MAINTENANCE SECTION

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 lm 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 rst Seal, lip side rst, 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 ush with the face of the Water
Seal Cap.
c. Insert the Impeller Spacer (39), beveled
end rst, through both Seals until its beveled
end is ush 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 rst,
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,

Page 8 of 8 S237-SA (en)
PN 97999-1860
install two new Oiler Felts (4) in the Oiler Body,
and retain them with the Oiler Adjusting Screw
(5). Run the Screw in until its trailing face is ush
with the face of the Oiler Body.
24. Install the Oiler Body O-rings (3) and (6) in their
respective grooves on the Oiler Body.
25. Install the Oiler Body Assembly in the Backhead
and retain it with the Oiler Body Retainer (7).
26. Place the Housing Seal (17) on the rim of the
Housing.
27. Place the Backhead (1) on the Housing, making
certain the Cylinder Dowel engages the dowel
hole in the Backhead. Install the Backhead Cap
Screws (13) and Lock Washers (12). Tighten them
to 20 ft-lb (27 Nm) torque.
28. Lay the Pump on its side and slide the Impeller
(41), hub side rst, on the splined end of the Ro-
tor Shaft. Manually rotate the Impeller. If it rubs
against the Housing, install an Impeller Shim (40)
or Shims as required to provide running clear-
ance between the Impeller and Housing.
29. Install the Impeller Retaining Washer (42) and
Screw (43). Tighten the Impeller Retaining Screw
to 12 to 15 ft-lb (16.2 to 20.3 Nm) torque.
30. For the most efficient operation of the Pump,
particularly against high heads, it is necessary
that the clearance between the Impeller and Im-
peller Cover (45) be regulated at 0.010”. Place the
Impeller Cover on the base of the Housing, using
the required Impeller Cover Shim (44) or Shims to
obtain the desired clearance.
31. Place the Inlet (46) against the Impeller Cover
and install the Impeller Cover Cap Screws (48)
and Lock Washers (47). Tighten the Cap Screws to
9 to 12 ft-lb (12.2 to 16.2 Nm) torque.
32. Inject 10 or 15 strokes of Ingersoll-Rand No. 80
Water Pump Grease into the Grease Fitting (15)
on the Motor Housing (14). Use the No. P25-228
Grease Gun.
TROUBLESHOOTING GUIDE
Trouble Probable Cause Solution
Low power or low free
speed
Low air pressure at the Inlet Check the air pressure at the Inlet. The pressure must not exceed 90
psig (6.2 bar/620 kPa).
Plugged Inlet Bushing Screen or Air
Strainer Screen Clean the Screen in a clean, suitable, cleaning solution. If it cannot be
cleaned, replace it.
WARNING
Never operate a Sump Pump without an Inlet Screen.
Ingestion of dirt into the Sump Pump can, in some cases, cause an
unsafe condition.
Worn or broken Vanes Replace the complete set of Vanes.
Worn or broken Cylinder Replace the Cylinder if it is worn or broken or if the bore is scored or
wavy.
Improper lubrication or dirt build -up
in the motor. Lubricate the Sump Pump as instructed in LUBRICATION. If lubrica-
tion does not result in satisfactory operation, disassemble the motor
inspect and clean all parts.
Rough operation Worn or broken Rear Rotor Bearing or
Front Rotor Bearing Examine each Bearing. Replace the Rear Rotor Bearing Seal Assembly if
worn or damaged or replace the Front Rotor Bearing.
Worn Rotor Key Replace the Key. Check the Arbor and Rotor for keyslot wear and re-
place if necessary.
Bent Arbor Mount the Arbor on centers. Check the bearing diameter runout with
an indicator. Replace the Arbor if runout exceeds 0.002” Total Indicator
Reading.
Scoring of End Plates or
Cylinder
Improper assembly Make certain that all motor parts are properly aligned prior to clamp-
ing the motor assembly.
Rotor Bearing Seal misalignment Loosen the Cylinder Case Screws. Rotate the spindle by hand to align
the seal. Re-tighten the Screws to 14 ft-lb (19 Nm) torque. The Spindle
must rotate freely.
High free speed Worn Rotor Bearing Seal Replace the Rotor Bearing Seal if the outside high diameter of the hub
is worn to 1.76”or smaller and/or the large inside diameter is worn
0.910” or larger.