OPERATOR’S MANUAL
66M2X0-XXX-C
RELEASED: 10-22-08
INCLUDING: OPERATION, INSTALLATION & MAINTENANCE
REVISED:
(REV. 03)
2-16-09
2" 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.
The original language of this manual is English.
SERVICE KITS
Refer to Model Description Chart to match the pump material op-
tions.
637434 for air section repair (see page 6).
637468-XX for fluid section repair (see page 4).
PUMP DATA
Models. . . . . . . . . . . . . . . . . see Model Description Chart for “-XXX”
Pump Type. . . . . . . . . . . . . Metallic Air Operated Double Diaphragm
Material. . . . . . . . . . . . . . . . see Model Description Chart
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74.15 lbs (33.63 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 (flooded inlet) . . . 156 g.p.m. (590.5 l.p.m.)
Displacement / Cycle @ 100 p.s.i.g. . . . . 1.02 gal. (3.86 lit.)
Maximum Particle Size . . . . . . . . . . . . . . . . 3/4”dia. (19.1 mm)
Maximum Temperature Limits (diaphragm / ball / seal material)
Figure 1
E.P.R. / EPDM . . . . . . . . . . . . . . . . . . . -60° to 280° F (-51° to 138° C)
Hytrel® . . . . . . . . . . . . . . . . . . . . . . . . . -20° to 150° F (-29° to 66° C)
Nitrile . . . . . . . . . . . . . . . . . . . . . . . . . . 10° to 180° F (-12° to 82° C)
Santoprene® . . . . . . . . . . . . . . . . . . . -40° to 225° F (-40° to 107° C)
Viton®. . . . . . . . . . . . . . . . . . . . . . . . . . -40° to 350° F (-40° to 177° C)
Dimensional Data. . . . . . . . . . . . . . . . . . . . . . see page 8
MODEL DESCRIPTION CHART
66M2 X 0 - X X X - C
Center Body Material / Fluid Connection
Noise Level @ 70 p.s.i., 60 c.p.m. . . . . . . 85.3 db(A)
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5
7
-
-
Aluminum / 2 - 11-1/2 NPTF - 2
Noise Level @ 70 p.s.i., 60 c.p.m. . . . . . . 105.3 db(A)
e
Aluminum / Rp 2 (2 - 11 BSP parallel)
Tested with 94810 muffler assembly installed.
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Fluid Cap & Manifold Material / Hardware
Aluminum / Carbon steel
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.
Tested with 97116 housing and 97110-2 ball installed. Hearing protec-
tion is recommended when operating this product.
0
-
Seat Material
Aluminum
1
-
e
Ball Material
Nitrile
C - Hytrel
Santoprene
2
-
NOTICE: All possible options are shown in the chart, however, certain
combinations may not be recommended, consult a representative or
the factory if you have questions concerning availability.
E
-
Diaphragm Material
2
9
-
-
Nitrile
Hytrel
B - Santoprene
Fluid Section Service Kit Selection
66M2X0 - X X X - C
637468 - X X
Example: Model #66M250-1EB-C
Fluid Section Service Kit # 637468-EB
Ball
Diaphragm
INGERSOLL RAND COMPANY LTD
P.O. BOX 151 ONE ARO CENTER BRYAN, OHIO 43506-0151
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© 2009
CCN 15321508
(800) 276-4658 FAX (800) 266-7016
fluids.ingersollrand.com
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ꢀ
GENERAL DESCRIPTION
MAINTENANCE
The ARO diaphragm pump offers high volume delivery even at low
air pressure and a broad range of material compatibility options are
available. Refer to the model and option chart. ARO pumps feature
stall resistant design, modular air motor / fluid sections.
Air operated double diaphragm pumps utilize a pressure differen-
tial in the air chambers to alternately create suction and a positive
fluid pressure in the fluid chambers, valve checks insure a positive
flow of fluid.
Pump cycling will begin as air pressure is applied and will continue
to pump and keep up with the demand. It will build and maintain
line pressure and will stop cycling once maximum line pressure is
reached (dispensing device closed) and will resume pumping as
needed.
Refer to the part views and descriptions as provided on pages 4
through 7 for parts identification and service kit information.
Certain ARO “Smart Parts” are indicated which should be avail-
able for fast repair and reduction of down time.
Service kits are divided to service two separate diaphragm
pump functions: 1. AIR SECTION, 2. FLUID SECTION. The Fluid
Section is divided further to match typical part Material Op-
tions.
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Provide a clean work surface to protect sensitive internal mov-
ing parts from contamination from dirt and foreign matter dur-
ing service disassembly and reassembly.
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Keep good records of service activity and include the pump in
preventive maintenance program.
Before disassembling, empty captured material in the outlet
manifold by turning the pump upside down to drain material
from the pump.
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AIR AND LUBE REQUIREMENTS
WARNING EXCESSIVE AIR PRESSURE. Can cause pump dam-
age, personal injury or property damage.
FLUID SECTION DISASSEMBLY
A filter capable of filtering out particles larger than 50 microns
should be used on the air supply. There is no lubrication re-
quired other than the “O” ring lubricant which is applied during
assembly or repair.
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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1. Remove top manifold(s).
2. Remove (22) balls, (19) “O”rings and (21) seats.
3. Remove (15) fluid caps.
4. Remove the (14) screw, (6) washer, (7) diaphragm and (5) wash-
er.
NOTE: Do not scratch or mar the surface of (1) diaphragm rod.
OPERATING INSTRUCTIONS
FLUID SECTION REASSEMBLY
Always flush the pump with a solvent compatible with the ma-
terial 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 inactive
for a few hours.
The outlet material volume is governed not only by the air sup-
ply, 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 collapse.
When the diaphragm pump is used in a forced-feed (flooded
inlet) situation, it is recommended that a “check valve” be in-
stalled at the air inlet.
Secure the diaphragm pump legs to a suitable surface to insure
against damage by vibration.
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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 (2) “O” ring with Key-Lube “O”
ring lube.
Use ARO pn / 98931-T bullet (installation tool) to aid in installa-
tion of (2) “O”ring on (1) diaphragm rod.
Be certain (7) diaphragms align properly with (15) fluid caps be-
fore making final torque adjustments on bolt and nuts to avoid
twisting the diaphragms.
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Re-check torque settings after the pump has been re-started
and run a while.
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Hytrel® and Viton® are registered trademarks of the DuPont Company Loctite® is a registered trademark of Henkel Loctite Corporation
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Santoprene® is a registered trademark of Monsanto Company, licensed to Advanced Elastomer Systems, L.P. ARO® is a registered trademark of Ingersoll-Rand Company
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262™, 271™ and 572™ are trademarks of Henkel Loctite Corporation
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66M2X0-XXX-C (en)
Page 3 of 8
PARTS LIST / 66M2X0-XXX-C FLUID SECTION
637468-XX Fluid section service kit includes: Balls (see Ball Option, refer to -XX in chart below), Diaphragms (see Diaphragm Option, refer to -XX in chart
below) and items 2 and 19 (listed below) plus 93706-1 Key-Lube grease packet (page 6).
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MATERIAL CODE
SEAT OPTIONS
66M2X0-XXX-C
BALL OPTIONS
66M2X0-XXX-C
[A] = Aluminum
[B] = Nitrile
[C] = Carbon Steel
[Co] = Copper
[E] = E.P.R.
(2” diameter)
“22”
“21”
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-XXX Seat
-1XX 97068
Qty Mtl
(4) [A]
-XXX Ball
Qty Mtl
[H] = Hytrel
-X2X 95826-2
-XCX 95826-C
-XEX 95826-A
(4)
(4)
[B]
[H]
[Sp] = Santoprene
[SS] = Stainless Steel
[V] = Viton
(4) [Sp]
DIAPHRAGM OPTIONS 66M2X0-XXX-C
(1/8” x 3-5/8” o.d.)
“19”
Service kit
“7”
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-XX = (Ball)
-XXX -XX = (Diaphragm)
Diaphragm
Qty
Mtl “O” Ring
[B] Y325-237
[H] Y327-237
[Sp] 94356
Qty
(4)
(4)
(4)
Mtl
[B]
[V]
[E]
-XX2 637468-X2
-XX9 637468-X9
-XXB 637468-XB
96391-G
96391-C
96391-A
(2)
(2)
(2)
COMMON PARTS
(size)
(size)
Item Description
Qty Part No.
(1) 97071
Mtl
[C]
Item Description
Qty Part No.
Mtl
1
2
5
6
9
Rod
Outlet manifold
61
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(3/32” x 1” o.d.)
(models 66M250-XXX-C, NPTF)
“O” Ring
(1) Y330-117 [B]
(1) 96375-1
(1) 96375-2
(2) 96576
(1) 97063
(1) 97064
(4) 97060
(4) 97059
(4) 96756
(6) 96741
(2) 97057
(4) 97055
[A]
[A]
[A]
[A]
[A]
[C]
[C]
[C]
[C]
[C]
[C]
(air side)
(models 66M270-XXX-C, BSP)
Washer
Washer
Washer
(2) 96503
(2) 96503
(2) 93065
[A]
[A]
(fluid side)
(0.630” i.d.)
182 Side Screen
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[SS]
183 Top Plate Screen
184 Base Plate Screen
(5/8” - 18 x 2-1/2”)
14 Screw
15 Fluid Cap
(2) Y5-111-T [SS]
(M10 x 1.5 - 6h)
(2) 96377
(8) 94409-1
(20) 94990-1
(20) 94992-1
(1) 93004
[A]
[C]
185 Lock Nut
(M10 x 1.5 - 6g x 34 mm)
(M10 x 1.5 - 6g x 35 mm)
26 Screw
27 Screw
186 Button Head Screw
(M10 x 1.5 - 6g x 45 mm)
(M10)
[C]
187 Washer
(M10 x 1.5 - 6h)
(M10 x 1.5 - 6g x 25 mm)
29 Nut
[C]
188 Button Head Screw
280 Handle
(see page 7)
43 Ground Lug
[Co]
Inlet manifold
281 Bracket
60
(models 66M250-XXX-C, NPTF)
(1) 96376-1
(1) 96376-2
[A]
[A]
(models 66M270-XXX-C, BSP)
“Smart Parts“, keep these items on hand in addition to the service kits for fast
repair and reduction of down time.
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Page 4 of 8
66M2X0-XXX-C (en)
PARTS LIST / 66M2X0-XXX-C FLUID SECTION
COLOR CODE
3
2
1
4
Diaphragm
Color
Ball
Material
Color
5
7
8
6
Hytrel
Nitrile
Cream
Black
Tan
Cream
Red (•)
Santoprene
Tan
(•) Dot
9
10
61
26
FOR THE AIR MO-
TOR SECTION, SEE
PAGES 6 & 7.
ꢁ
281
280
Torque Sequence
5
7
14 ꢁꢂ
22
21
19
ꢀ
27
ꢁ
29
2
ꢀ
1
183
188
15
6
9
22
21
19
182
60
ꢀ
26
ꢁ
186
188
184
Figure 2
182 187 186 185
ASSEMBLY TORQUE REQUIREMENTS
NOTE: DO NOT OVERTIGHTEN FASTENERS.
ALL FASTENERS ARE METRIC.
)
(
(14) screw, 65 - 70 ft lbs (88.1 - 94.9 Nm).
(26) screw, 30 - 40 ft lbs (40.7 - 54.2 Nm).
(27) screw, 30 - 40 ft lbs (40.7 - 54.2 Nm).
LUBRICATION / SEALANTS
Apply Key-Lube grease to all “O” rings, “U” cups and mating parts.
Apply Loctite® 271™ to threads.
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66M2X0-XXX-C (en)
Page 5 of 8
PARTS LIST / 66M2X0-XXX-C AIR MOTOR SECTION
Indicates parts included in 637434 air section service kit.
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AIR MOTOR PARTS
(size)
(size)
Item Description
101 Motor Body
Qty Part No.
Mtl
Item Description
Qty Part No.
(2) 98723-2
(2) 94820
Mtl
[Bz]
[U]
[C]
[C]
[I]
(1) 96374
(2) Y325-24
(1) 94528
(2) Y145-26
(8) 93860
(2) 96424
(1) 96426
(1) 96422
(1) Y186-55
(1) 96421
(5) 93251
(5) Y325-222
(6) Y325-134
(4) 93250
(1) 96420
(1) 96425
(1) 93309-2
(4) 93075
(3) 115959
[A]
121 Sleeve Bushing
(1/16” x 1-1/4” o.d.)
(3/32” x 9/16” o.d.)
122 “O” Ring
102 “O” Ring
103 Sleeve
[B]
p
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p
p
p
(#8 - 32 x 3/8”)
[D]
123 Screw
(4) Y154-41
(1) Y227-6-L
(1) Y27-7-C
(1) 96451
(1-5/32” i.d.)
(3/4 - 14 PTF x 17/32”)
104 Retaining Ring
105 Screw / Lockwasher
107 Plate
[C]
126 Pipe Plug
(1/4” - 20 x 5/8”)
(1-1/4 - 11-1/2 NPT x 1-5/8”)
[C]
127 Nipple
(1-1/4 - 11-1/2 NPT x 1-1/2 -
127 Pipe Fitting
[C]
[SS]
[B/Ny]
[D]
11-1/2 NPT) (optional) (not shown)
(1/8 - 27 PTF x 1/4”)
(with notch)
108 Gasket
p
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p
o
o
p
p
o
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p
109 Piston
128 Pipe Plug
(1) Y227-2-L
(2) 94987
(1) 94987-1
(1) 97116
(1) 67389
[C]
[SS]
[SS]
[A]
(3/16” x 2-1/8” o.d.)
(1/4” - 20 x 1/4”)
(1/4” - 20 x 3/8”)
110 “U” Cup
111 Spool
[B]
197 Button Head Screw
198 Button Head Screw
[A]
(2.055” o.d.)
112 Washer
113 “O” Ring
114 “O” Ring
115 Spacer
116 Spacer
117 Gasket
[GPS]
[B]
201 Exhaust Check Housing
(includes item 127) (optional)
(1/8” x 1-3/4” o.d.)
(3/32” x 2-1/16” o.d.)
201 Muffler Kit
(not shown)
[B]
(1.500” diameter)
[GPS]
[D]
282 Ball
(1) 97110-2
[B]
[B/Ny]
[C]
Key-Lube “O” Ring Lubricant
(1) 93706-1
(10) 637175
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118 Pilot Rod
119 “O” Ring
120 Spacer
10 Pak of Key-Lube
(1/8” x 3/4” o.d.)
[U]
p
“Smart Parts“, keep these items on hand in addition to the service kits for fast
repair and reduction of down time.
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[Z]
MATERIAL CODE
PILOT VALVE REASSEMBLY
[A] = Aluminum
[B] = Nitrile
[Bz] = Bronze
[C] = Carbon Steel
[D] = Acetal
[I] = Iron
[Ny] = Nylon
[SS] = Stainless Steel
[U] = Polyurethane
[Z] = Zinc
1. Replace two (102) “O” rings, if worn or damaged, and reinstall
(103) sleeve.
2. Install one of the (121) sleeve bushings, (119) “O” rings, (120)
spacers and the remaining (121) bushing.
[GPS] = Glass filled Polyphenylene Sulfide
3. Carefully push (118) pilot rod into bushings etc. and retain on
each end with the two (122) “O”rings. Retain with (123) screws.
4. Replace (104) retaining rings.
AIR MOTOR SECTION SERVICE
Service is divided into two parts - 1. Pilot Valve, 2. Major Valve.
GENERAL REASSEMBLY NOTES:
MAJOR VALVE DISASSEMBLY
Air Motor Section service is continued from Fluid Section repair.
Inspect and replace old parts with new parts as necessary. Look
for deep scratches on metallic surfaces, and nicks or cuts in “O”
rings.
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1. Remove (107) plate and (108 and 117) gaskets.
2. On the side opposite the air inlet, push on the inner diameter
of (111) spool. This will force the (109) piston out. Continue
pushing the (111) spool and remove. Check for scratches and
gouges.
3. Reach into the air section (exhaust side) and remove (116)
spacer, (115) spacers, (113) “O” rings, (114) “O” rings, (112) wash-
ers. etc. Check for damaged “O”rings.
Take precautions to prevent cutting “O”rings upon installation.
Lubricate “O”rings with Key-Lube.
Do not over-tighten fasteners. Refer to torque specification
block on view.
Re-torque fasteners following restart.
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PILOT VALVE DISASSEMBLY
MAJOR VALVE REASSEMBLY
1. Remove (104) retaining ring.
1. Replace (112) washer, (114)“O”ring and (113)“O”ring onto (115)
spacer and insert etc. NOTE: Be careful to orient spacer legs
away from blocking internal ports.
2. Lubricate and carefully insert (111) spool.
3. Install (117) gasket and (107) plate.
2. Remove (123) screws and (122) “O”rings.
3. Remove (118) piston rod, (121) sleeve bushing, (119) “O” rings
and (120) spacers from the (101) motor body.
4. Remove (103) sleeve and (102) “O”rings.
4. Lubricate and install (110) packing cup and insert (109) piston
into (air inlet side) cavity. The (110) packing cup lips should
point outward.
5. Install (108) gasket and replace (107).
Page 6 of 8
66M2X0-XXX-C (en)
PARTS LIST / 66M2X0-XXX-C AIR MOTOR SECTION
IMPORTANT
111
BE CERTAIN TO ORIENT (115)
SPACER LEGS AWAY FROM BLOCK-
ING INTERNAL PORTS WHEN
REASSEMBLING AIR SECTION.
105
107
117
ꢁ
ꢀ
114
115
114
116
ꢀ
ꢀ
113
112
MAJOR VALVE
See cross section detail, figure 4.
201
282
127
101
128
Figure 3
ꢅ
ꢅ
126
104
121
197
102
103
104
ꢂ
ꢀ
ꢀ
ꢃꢄ 123
108
107
ꢄ
105
109
110
PILOT VALVE
ꢀ
119
ꢀ
ꢂ
ꢂ
198
121
43
123 ꢁꢃ
197
118
122
ꢀ
ꢀ
MAJOR VALVE CROSS SECTION DETAIL
120
109 110
ꢀ
112 114
ꢀ
111 115 113
ꢀ
116
ASSEMBLY TORQUE REQUIREMENTS
)
(
NOTE: DO NOT OVERTIGHTEN FASTENERS.
(105) screw, 40 - 50 in. lbs (4.5 - 5.6 Nm).
(123) screw, 20 - 25 in. lbs (2.3 - 2.8 Nm).
LUBRICATION / SEALANTS
Apply Key-Lube grease to all “O” rings, “U” cups and mating
parts.
c
Apply Loctite 271 to threads.
Apply Loctite 262™ to threads.
Apply Loctite 572™ to threads.
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f
g
Figure 4
66M2X0-XXX-C (en)
Page 7 of 8
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 (14) diaphragm screw.
Check for plugged outlet hose.
Check for kinked (restrictive) outlet material hose.
Check for kinked (restrictive) or collapsed inlet material hose.
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
volume.
Air bubbles in product discharge.
Check connections of suction plumbing.
Check “O”rings between intake manifold and fluid caps.
Check tightness of (14) diaphragm screw.
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Check all joints on the inlet manifolds and suction connections.
These must be air tight.
Inspect the pump for solid objects lodged in the diaphragm
chamber or the seat area.
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DIMENSIONAL DATA
Dimensions shown are for reference only, they are displayed in inches and millimeters (mm).
M - Exhaust port
L - Material outlet
K - Air inlet
B
A
E
C
D
H
J
G
F
DIMENSIONS
- 13”(330.2 mm)
A - 17-15/16”(455.1 mm)
E
F
J
- 16-5/32”(409.9 mm)
B - 25-19/32”(650.0 mm)
C - 8-31/32”(227.6 mm)
D - 2”(50.8 mm)
- 10-1/16”(255.6 mm)
K - 3/4 - 14 NPTF - 2
G - 26-23/32”(678.2 mm)
H - 25-3/32”(637.3 mm)
L
- see below
M - 1-1/4 - 11-1/2 NPTF - 2
“L”
66M250-XXX-C
66M270-XXX-C
2 - 11-1/2 NPTF - 2
Rp 2 (2 - 11 BSP, parallel)
Figure 5
PN 97999-1400
66M2X0-XXX-C (en)
Page 8 of 8
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