OPERATOR’S MANUAL
670106
3-30-10
RELEASED:
(REV. 01)
INCLUDING: OPERATION, INSTALLATION & MAINTENANCE
3" DIAPHRAGM PUMP
1:1 RATIO, METALLIC
READ THIS MANUAL CAREFULLY BEFORE INSTALLING,
OPERATING OR SERVICING THIS EQUIPMENT.
It is the responsibility of the employer to place this information in the hands of the operator. Keep for future reference.
SERVICE KITS
Refer to Model Description Chart to match the pump mate-
rial options.
637421 for air section repair (see page 6).
637303-TA for fluid section repair (see page 4).
PUMP DATA
Models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 670106
Pump Type. . . . . . . . . . . . . . . Air Operated Double Diaphragm
Material. . . . . . . . . . . . . . . . . . see Model Description Chart
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245.60 lbs (111.4 kgs)
Maximum Air Inlet Pressure . . . . . . . . 120 p.s.i.g. (8.3 bar)
Maximum Material Inlet Pressure. . . 10 p.s.i.g. (0.69 bar)
Maximum Outlet Pressure . . . . . . . . . . 120 p.s.i.g. (8.3 bar)
Maximum Flow Rate . . . . . . . . . . . . . . . . 237 g.p.m. (897 l.p.m.)
(flooded inlet)
. . . . . . . . . . . . . . . 275 g.p.m. (1041 l.p.m.)
Displacement / Cycle @ 100 p.s.i.g. . 2.8 gal. (10.6 lit.)
Maximum Particle Size . . . . . . . . . . . . . 3/8”dia. (9.5 mm)
Maximum Temperature Limits (diaphragm / ball / seal /
seat material)
Santoprene®. . . . . . . . . . . . . . -40° to 225° F (-40° to 107° C)
PTFE. . . . . . . . . . . . . . . . . . . . . . 40° to 225° F (4° to 107° C)
Dimensional Data. . . . . . . . . . . . . . . . . . . see page 8
Figure 1
Noise Level @ 70 p.s.i., 50 c.p.m. . . . 83.0 db(A)
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Tested with 67263 muffler assembly installed.
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MODEL DESCRIPTION CHART
The pump sound pressure levels published here have been updated to
an Equivalent Continuous Sound Level (LAeq) to meet the intent of ANSI
S1.13-1971, CAGI-PNEUROP S5.1 using four microphone locations.
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Air Motor / Air Cap Material
Aluminum / Aluminum
Fluid Connection
3" A.N.S.I / DIN Flange
Fluid Cap & Manifold Material
Stainless Steel
Hardware Material
Stainless Steel
Seat Material
316 Stainless Steel
Ball Material
PTFE
Diaphragm Material
Santoprene
INGERSOLL RAND COMPANY LTD
209 NORTH MAIN STREET – BRYAN, OHIO 43506
© 2010
CCN 15337918
(800) 495-0276 FAX (800) 892-6276
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OPERATING INSTRUCTIONS
WARNING = Hazards or unsafe practices which
could result in severe personal injury,
death or substantial property damage.
CAUTION = Hazards or unsafe practices which
could result in minor personal injury,
product or property damage.
Always flush the pump with a solvent compatible with
the material being pumped if the material being pumped
is subject to “setting up” when not in use for a period of
time.
Disconnect the air supply from the pump if it is to be in-
active for a few hours.
The outlet material volume is governed not only by the
air supply, but also by the material supply available at the
inlet. The material supply tubing should not be too small
or restrictive. Be sure not to use hose which might col-
lapse.
When the diaphragm pump is used in a forced-feed
(flooded inlet) situation, it is recommended that a “check
valve”be installed at the air inlet.
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NOTICE
= Important installation, operation or
maintenance information.
GENERAL DESCRIPTION
The ARO diaphragm pump offers high volume delivery even
at low air pressure. ARO pumps feature stall resistant design,
modular air motor / fluid sections.
Air operated double diaphragm pumps utilize a pressure dif-
ferential in the air chambers to alternately create suction and
a positive fluid pressure in the fluid chambers, ball checks
insure a positive flow of fluid.
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Secure the diaphragm pump legs to a suitable surface to
insure against damage by vibration.
Pump cycling will begin as air pressure is applied and it will
continue to pump and keep up with the demand. It will build
and maintain line pressure and will stop cycling once maxi-
mum line pressure is reached (dispensing device closed) and
will resume pumping as needed.
MAINTENANCE
Refer to the part views and descriptions as provided on
pages 4 through 7 for parts identification and service kit in-
formation.
Certain ARO “Smart Parts” are indicated which should be
available for fast repair and reduction of down time.
Service kits are available to service two separate dia-
phragm pump functions: 1. AIR SECTION, 2. FLUID SEC-
TION. The Fluid Section is divided further to match typical
active Material Options.
Provide a clean work surface to protect sensitive internal
moving parts from contamination from dirt and foreign
matter during service disassembly and reassembly.
Keep good records of service activity and include the
pump in preventive maintenance program.
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AIR AND LUBE REQUIREMENTS
WARNING EXCESSIVE AIR PRESSURE. Can cause pump
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damage, personal injury or property damage.
A filter capable of filtering out particles larger than 50
microns should be used on the air supply. There is no lu-
brication required other than the “O” ring lubricant which
is applied during assembly or repair.
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If lubricated air is present, make sure that it is compatible
with the “O” rings and seals in the air motor section of the
pump.
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Before disassembling, empty captured material in the
outlet manifold by turning the pump upside down to
drain material from the pump.
Loctite® is a registered trademark of Henkel Loctite Corporation ARO® is a registered trademark of Ingersoll-Rand Company 262™, 271™ and 572™ are trademarks of the DuPont Company
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Santoprene® is a registered trademark of Monsanto Company, licensed to Advanced Elastomer Systems, L.P.
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670106 (en)
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PARTS LIST / 670106 FLUID SECTION
637303-TA fluid section service kits include: Balls (item 22), diaphragms (item 7) plus items 19, 70, 144, 175 (listed below) plus
174 and 94276 Lubriplate® FML-2 grease (page 6).
PARTS LIST
(size)
(size)
Item Description
Qty Part No.
(1) 94984
(2) 66167
(2) 94094
(2) 94091-A
(2) 94107
(4) Y328-350
(4) 94113
(4) 94103-T
(12) 94412-2
(16) 94991
(16) 95053
[Mtl]
[C]
Item Description
32 Leg
Qty Part No.
(2) 94703-2
(1) 93004
(1) 96785
(1) 96784
(1) 94030-1
(1) 94030-2
(2) 94100
(4) 94531
(2) Y186-51
(2) Y325-117
(4) 94098
[Mtl]
[SS]
[Co]
[SS]
[SS]
[A]
1
5
6
7
Rod
(see page 7)
Backup Washer
Diaphragm Screw
Diaphragm
[SS]
[SS]
[Sp]
[SS]
[T]
43 Ground Lug
60 Inlet Manifold
61 Outlet Manifold
68 Air Cap
15 Fluid Cap
19 “O” Ring
21 Seat
(3/16” x 5” o.d.)
69 Air Cap
[A]
[SS]
[T]
70 Gasket
[B]
9
(3-1/4” diameter)
(M10 x 1.5 - 6g x 120 mm)
22 Ball
131 Screw
[C]
(M12 x 1.75 - 6g x 45 mm)
(M12 x 1.75 - 6g x 60 mm)
(3/16” x 1-3/8” o.d.)
(3/32” x 1” o.d.)
26 Screw
27 Screw
[SS]
[SS]
[SS]
144 “U” Cup
[B]
9
9
9
175 “O” Ring
[B]
(M12 x 1.75 - 6h)
(0.406” i.d. x 0.031” thick)
29 Nut
180 Gasket
[Co]
Indicates items included in 637421 air section repair kit.
9
MATERIAL CODE
FLUID SECTION DISASSEMBLY
[A] = Aluminum
[B] = Nitrile
[C] = Carbon Steel
[Co] = Copper
[Sp] = Santoprene
[SS] = Stainless Steel
[T] = PTFE
1. Remove top manifold(s).
2. Remove (22) balls, (19) “O”rings and (21) seats.
3. Remove (15) fluid caps.
4. Remove (6) diaphragm screws, (7) diaphragms and (5)
backup washers.
NOTE: Do not scratch or mar the surface of (1) diaphragm
rod.
1. Apply Loctite 271 Threadlocker to thread (3) on (5) Back-
up Washer.
FLUID SECTION REASSEMBLY
2. Insert (7) Diaphragm insuring seal bead on (7) Diaphragm
is in the groove on (5) Back-up Washer.
3. Thread (6) Diaphragm Screw onto the stud on (5) Back-up
Washer.
SERVICE NOTE: ARO pn 94094-TIL diaphragm assembly tool
is recommended for use when reassembling the pump.
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Reassemble in reverse order.
Clean and inspect all parts. Replace worn or damaged
parts with new parts as required.
Lubricate (1) diaphragm rod and (144) “U”cup with Lubri-
plate FML-2 grease. (94276 grease packet is included in
service kit.)
Applying a light coating of Lubriplate FML-2 Grease to
the surfaces of (6) Diaphragm Screw and (7) Diaphragm,
being careful not to get grease on the Loctite prepared
area. This will reduce friction during tightening of the
assembly. Tighten 65-70 Ft-Lbs.
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Be certain the diaphragm assembly bottoms out on the
(1) rod.
Re-check torque settings after pump has been re-started
and run a while.
Diaphragm Assembly
ASSEMBLING DIAPHRAGM ASSEMBLY
1
7
6
5
3
1. Screw the two Diaphragm Assemblies to (1) Rod.
2. Tighten Diaphragm Assemblies to 65-70 Ft-Lbs.
Be sure to torque both sides.
Diaphragm assembly: (3) Thread, (5) Back-up Washer, (6)
Diaphragm Screw, (7) Diaphragm.
Page 4 of 8
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PARTS LIST / 670106 FLUID SECTION
3
2
1
4
5
7
8
6
FOR THE AIR MO-
TOR SECTION, SEE
61
PAGES 6 & 7.
Torque Sequence
26 ꢁꢃ
68
175
ꢀ
70
ꢀ
70
ꢀ
29
ꢂ
1
5
ꢄ
ꢁ
7
6 ꢁ
22
21
19
ꢀ
27 ꢁꢂ
15
ꢀ
144
ꢀ
175
144
ꢀ
69
60
180
131ꢁꢅ
22
19
21
ꢀ
26 ꢁꢃ
Figure 2
32
ASSEMBLY TORQUE REQUIREMENTS
NOTE: DO NOT OVERTIGHTEN FASTENERS.
ALL FASTENERS ARE METRIC.
)
(
(5) Stud, 90 ft lbs (122 Nm) maximum.
(6) Diaphragm screw, 65 - 70 ft. lbs (88.1 - 94.9 Nm).
(26) Screw, 60 - 70 ft lbs (81.3 - 94.9 Nm).
(27) Screw, 60 - 70 ft lbs (81.3 - 94.9 Nm).
(131) Screw, 35 - 40 ft lbs (47.5 - 54.2 Nm).
LUBRICATION / SEALANTS
Apply Lubriplate FML-2 grease (94276) to all “O” rings, “U” cups and
mating parts.
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Apply Loctite® 242® to threads at assembly.
Apply Loctite 271™ to threads at assembly.
Apply anti-seize compound to threads and bolt and nut flange heads
which contact pump case when using stainless steel fasteners.
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NOTE: Lubriplate FML-2 is a white food grade petroleum grease.
670106 (en)
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PARTS LIST / 670106 AIR MOTOR SECTION
Indicates parts included in 637421 air section repair kit.
9
AIR MOTOR PARTS LIST
(size)
(size)
Item Description
Qty Part No.
(1) 94028
(1) 94092
(4) 95887
(1) 95651
(2) 94083
(2) 94084
(1) 94860
(2) Y29-42-S
(1) 94099
[Mtl]
[A]
Item Description
Qty Part No.
(2) 94433
[Mtl]
[U]
[B]
(3/32” x 5/8” o.d.)
(1/8” x 7/8” o.d.)
101 Center Body
103 Bushing
168 “O” Ring
169 “U” Cup
[D]
(1) Y240-9
(1) 94081
(M6 x 1 - 6g x 20 mm)
105 Screw
[SS]
[D]
170 Piston Sleeve
[Br]
[B]
(3/32” x 1-1/8” o.d.)
111 Spool
171 “O” Ring
172 “O” Ring
173 “O” Ring
174 “O” Ring
(1) Y325-119
(1) Y325-22
(2) Y325-26
(2) Y325-202
(2) 94102
9
9
(0.250” x 2.276” long)
(1-1/2 - 11-1/2 N.P.T.)
(1/16” x 1-1/8” o.d.)
(1/16” x 1-3/8” o.d.)
(1/8” x 1/2” o.d.)
(check valve)
118 Actuator Pin
121 Sleeve
[SS]
[D]
[B]
[B]
9
127 90˚ St. Elbow
[C / I]
[SS]
[B]
[B]
9
9
(1/4” - 20 x 1/4”)
128 Set Screw
132 Gasket
176 Diaphragm
199 Track Gasket
200 Gasket
[Sp]
[B]
(1) 95666
9
9
(1/4”)
133 Lockwasher
(3) Y117-416-C [C]
(1) 95665
[B]
9
(M6 x 1 - 6g x 30 mm)
(includes item 127)
134 Screw
(4) 96358
(1) 96334-1
(1) 96335
(1) Y325-32
(1) 95966
(1) Y186-50
(1) 95650
(1) 95659
(1) 94026
(1) 67164
[SS]
[A]
201 Muffler
(1) 94810
135 Valve Housing
136 Plug
233 Adapter Plate
(1) 96336
[A]
[SS]
[B]
[B]
[B]
[B]
(M6 x 1 - 6g x 16 mm)
[A]
240 Screw
(2) 95991
(1/16” x 2” o.d.)
137 “O” Ring
138 “U” Cup
139 “U” Cup
[B]
241 Track Gasket
(1) 96344
9
9
9
9
9
9
9
(3/16” x 1.792” o.d.)
(3/16” x 1-1/4” o.d.)
(1/16” x 7/32” o.d.)
[B]
242 “O” Ring
243 “O” Ring
244 “O” Ring
(1) Y325-5
(1) Y325-204
(1) Y325-208
(1/8” x 5/8” o.d.)
(1/8” x 7/8” o.d.)
[B]
140 Valve Insert
141 Valve Plate
166 Track Gasket
167 Pilot Assembly
[Ck]
[Ck]
[B]
Lubriplate FML-2 grease
Lubriplate grease packets
(1) 94276
9
9
9
(includes 168 and 169)
[D]
(10) 637308
Indicates items included in 637303-TA fluid section repair kit.
MATERIAL CODE
[A] = Aluminum
[B] = Nitrile
[Br] = Brass
[Ck] = Ceramic
[D] = Acetal
[I] = Cast Iron
[Sp] = Santoprene
[SS] = Stainless Steel
[U] = Polyurethane
2. Install new (171 and 172) “O”rings. Replace (170) sleeve.
3. Install new (168) “O” rings and (169) seal - Note lip direc-
tion. Lubricate and replace.
[C] = Carbon Steel
4. Reassemble remaining parts. Replace (173 and 174) “O”
rings.
AIR MOTOR SECTION SERVICE
Service is divided into two parts - 1. Pilot Valve, 2. Major
Valve.
MAJOR VALVE DISASSEMBLY
GENERAL REASSEMBLY NOTES:
1. Remove (135) valve block and (233) adapter plate, expos-
ing (166 and 132) gaskets and (176) checks.
2. Remove (233) adapter plate, releasing (140) valve insert,
(141) valve plate, (199, 200 and 241) gaskets and (243 and
244) “O”rings.
3. Remove (136) plug and (137) “O” ring, releasing (111)
spool.
Air Motor Section service is continued from Fluid Section
repair.
Inspect and replace old parts with new parts as neces-
sary. Look for deep scratches on metallic surfaces, and
nicks or cuts in “O”rings.
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Take precautions to prevent cutting “O” rings upon instal-
lation.
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Lubricate “O”rings with Lubriplate FML-2 grease.
Do not over-tighten fasteners. Refer to torque specifica-
tion block on view.
Re-torque fasteners following restart.
SERVICE TOOLS - To aid in the installation of (168) “O”
rings onto the (167) pilot piston, use tool # 204130-T,
available from ARO.
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MAJOR VALVE REASSEMBLY
1. Install new (138 and 139) “U” cups on (111) spool - LIPS
MUST FACE EACH OTHER.
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2. Insert (111) spool into (135) valve housing.
3. Install (137 and 242) “O” rings on (136) plug and assemble
plug to (135) valve housing, securing with (105) screws.
4. Install (140) valve insert, (141) valve plate, (199) gasket
and (243 and 244) “O” rings into (135) valve housing.
NOTE: Assemble (140) valve insert with “dished” side to-
ward (141) valve plate. Assemble (141) valve plate with
part number identification toward (140) valve insert.
5. Assemble (200 and 241) gaskets and (233) adapter plate
to (135) valve housing, securing with (240) screws.
6. Assemble (132 and 166) gaskets and (176) checks to (101)
center body.
PILOT VALVE DISASSEMBLY
1. A light tap on (118) should expose the opposite (121)
sleeve, (167) pilot piston and other parts.
2. Remove (170) sleeve. Inspect inner bore of sleeve for
damage.
PILOT VALVE REASSEMBLY
7. Assemble (135) valve housing and components to (101)
center body, securing with (134) screws.
1. Clean and lubricate parts not being replaced from service
kit.
Page 6 of 8
670106 (en)
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PARTS LIST / 670106 AIR MOTOR SECTION
118
ꢀ
169
168
ꢀ
PILOT VALVE
PART GROUP
121
174
172
171
170
ꢀ
ꢀ
ꢀ
ꢀ
173
167
173
121
118
174
103
101
ꢀ
ꢀ
140
ꢀ
199
ꢀ
244
ꢀ
243 233
ꢀ
132 166
ꢀ
135
133
ꢆ 134
43
ꢀ
141
ꢀ
200 241
ꢀ
128
ꢄ
240 ꢁ 176
ꢀ
Optional 94117 Muffler
138
111
139
242
128
ꢀ
ꢀ
ꢄ
201
127
ꢀ
137
136
105 ꢁ
MAJOR VALVE
Figure 3
A 637374-2 replacement major valve service assembly is
available separately, which includes the following:
) ASSEMBLY TORQUE REQUIREMENTS (
NOTE: DO NOT OVERTIGHTEN FASTENERS.
ALL FASTENERS ARE METRIC.
105 (4), 111, 128 (2), 132, 133 (3), 134, 135, 136, 137, 138,
139, 140, 141, 166, 176 (2), 199, 200, 233, 240 (2), 241,
242, 243 and 244.
(105) screw, 40 - 50 in. lbs (4.5 - 5.6 Nm).
(134) screw, 40 - 50 in. lbs (4.5 - 5.6 Nm).
(240) screw, 40 - 50 in. lbs (4.5 - 5.6 Nm).
LUBRICATION / SEALANTS
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Apply Lubriplate FML-2 grease to all “O” rings, “U” cups
and mating parts.
Apply Loctite 271 to threads at assembly.
670106 (en)
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TROUBLE SHOOTING
Product discharged from exhaust outlet.
Low output volume, erratic flow or no flow.
Check for diaphragm rupture.
Check air supply.
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Check tightness of (6) diaphragm screw.
Check for plugged outlet hose.
Check for kinked (restrictive) outlet material hose.
Check for kinked (restrictive) or collapsed inlet material
hose.
Air bubbles in product discharge.
Check connections of suction plumbing.
Check “O”rings between intake manifold and fluid caps.
Check tightness of (6) diaphragm screw.
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Check for pump cavitation - suction pipe should be sized
at least as large as the inlet thread diameter of the pump
for proper flow if high viscosity fluids are being pumped.
Suction hose must be a non-collapsing type, capable of
pulling a high vacuum.
Check all joints on the intake manifolds and suction con-
nections. These must be air tight.
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Motor blows air or stalls.
Check (176) check valve for damage or wear.
Check for restrictions in valve / exhaust.
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Inspect the pump for solid objects lodged in the dia-
phragm chamber or the seat area.
DIMENSIONAL DATA
Dimensions shown are for reference only, they are displayed in inches and millimeters (mm).
Q - Material Outlet
T - Bolt Circle
U
A
J
K
H- Air Inlet
C
L
B
D
Dotted lines show
optional 67263
muffler assembly.
G
N
P
E
M
R - Exhaust Port
F
S
Q - Material Inlet
Figure 4
DIMENSIONS
A - 23.121”(587.3 mm)
B - 30.000”(762 mm)
C - 27.238”(691.8 mm)
D - 15.965”(405.5 mm)
E - 0.562”slot (14.3 mm)
F - 12.013”(305.1 mm)
G - 2.750”(69.9 mm)
H - 3/4 - 14 NPTF
J - 15.000”(381 mm)
K - 3.720”(94.5 mm)
L - 32.000”(812.8 mm)
M - 1.000”(25.4)
N - 10.156”(258 mm)
P - 11.656”(296.1 mm)
Q - 3”A.N.S.I. / DIN Flange
R - 1-1/2 - 11-1/2 N.P.T.
S - 23.08 (586.3 mm)
T - 6.000”(152.4 mm)
U - 17.69”(449.3 mm)
PN 97999-1549
670106 (en)
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