OPERATOR’S MANUAL
6662AX-X-C
5-3-88
RELEASED:
REVISED:
(REV. R)
INCLUDING: OPERATION, INSTALLATION & MAINTENANCE
5-12-10
2” DIAPHRAGM PUMP
1:1 RATIO (NON-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 material
options.
637118-C for Air Section repair (see page 6).
637165-XX for Fluid Section repair (see page 4).
PUMP DATA
Models . . . . . . see Model Description Chart for “-XXX”.
Pump Type . . . Non-Metallic Air Operated Double Diaphragm
Material . . . . . see Model Description Chart
Material Inlet / Outlet . . . . . . . . . . . . . . 2”A.N.S.I. Flange
Weight. . . . . . . . . . Polypropylene. . . . . . . 62 lbs (28.1 kg)
P.V.D.F. (Kynar). . . . . . . 92 lbs (41.7 kg)
[add 23 lbs (10.4 kgs) for cast iron air motor section]
Maximum Air Inlet Pressure . . . . . . . . 120 p.s.i.g. (8.3 bar)
Maximum Outlet Pressure. . . . . . . . . . 120 p.s.i.g. (8.3 bar)
6662A3-XXX-C
Maximum Material Inlet Pressure . . . 10 p.s.i.g. (0.69 bar)
Maximum Flow Rate (flooded inlet) . . . 145 g.p.m. (548.8 l.p.m.)
Maximum Particle Size . . . . . . . . . . . . 1/4”dia. (6.4 mm)
Maximum Temperature Limits (diaphragm / ball / seal material)
Polypropylene . . . . . . . . . . . 350 to 1750 F (1.70 to 790 C)
P.V.D.F . . . . . . . . . . . . . . . . . . 100 to 2000 F (-120 to 930 C)
Dimensional Data . . . . . . . . . . . . . . . . see page 8
MODEL DESCRIPTION CHART
6662X X X X X C
CENTER BODYMATERIAL
A - Aluminium
B - Cast Iron
Noise Level @ 70 p.s.i., 60 c.p.m. . . . . . 77.7 db(A)
FLUIDCAP / MANIFOLD MATERIAL
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-PNEU-
ROP S5.1 using four microphone locations.
3 - Polypropylene
4 - P.V.D.F. (Kynar
)
SEAT MATERIAL
2 - 316 Stainless Steel
3 - Polypropylene
NOTICE: All possible options are shown in the chart, how-
ever, certain combinations may not be recommended,
consult a representative or the factory if you have ques-
tions concerning availability.
4 - P.V.D.F. (Kynar
)
8 - 440 Stainless Steel
BALL MATERIAL
1 - Neoprene
2 - Nitrile
3 - Viton
5 - E.P.R.
8 - Polyurethane
E - Santoprene
4 - PTFE
DIAPHRAGMMATERIAL
1 - Neoprene
2 - Nitrile
3 - Viton
5 - E.P.R.
9 - Hytrel
B - Santoprene
4 - PTFE / Santoprene
FLUID SECTION SERVICE KIT SELECTION
6662XX X X X
637165 X X
C
EXAMPLE: MODEL # 6662A3-321-C
FLUID SECTION SERVICE KIT # 637165-21
BALL
DIAPHRAGM
INGERSOLL RAND COMPANY LTD
209 NORTH MAIN STREET
BRYAN, OHIO 43506
CCN 99443517
© 2010
(800) 495-0276 FAX(800) 892-6276
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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 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 dif-
ferential in the air chambers to alternately create suction and
positive fluid pressure in the fluid chambers, ball checks insure
a positive flow of fluid.
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.
Refer to the part views and descriptions as provided on page 4
through 7 for parts identification and Service Kit information.
Certain ARO “Smart Parts” are indicated which should be
available for fast repair and reduction of down time.
Service kits are divided to service two separate dia-
phragm pump functions: 1. AIR SECTION, 2. FLUID SEC-
TION. The FLUID SECTION is divided further to match
typical part 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 pump
in preventive maintenance program.
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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.
AIR AND LUBE REQUIREMENTS
WARNING
EXCESSIVE AIR PRESSURE. Can cause pump
FLUID SECTION DISASSEMBLY
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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1. Remove top manifold(s).
2. Remove (22) balls, (19 and 33) “O”rings and (21) seats.
3. Remove (15) fluid caps.
NOTE: Only PTFE diaphragm models use a primary dia-
phragm (7) and a backup diaphragm (8). Refer to the auxil-
iary view in the Fluid Section illustration.
4. Remove the (6) nut, (7) or (7 / 8) diaphragms and (5) washers.
5. Remove (3 and 4) “O”rings.
NOTE: Do not scratch or mar the surface of (1) diaphragm rod.
When lubricated air is necessary, supply the air lubricator
with a good grade of SAE 90 wt. non-detergent oil and
set the lubricator to a rate not to exceed one drop per
minute.
OPERATING INSTRUCTIONS
FLUID SECTION REASSEMBLY
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 inactive
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 restric-
tive. 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
installed at the air inlet.
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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
KeyLube® grease.
Use ARO PN / 98931-T Bullet (installation tool) to aid in
installation of (2) “O”ring on (1) diaphragm rod.
Be certain (7) or (7 / 8) diaphragm(s) align properly with
(15) fluid caps before making final torque adjustments on
bolt and nuts to avoid twisting the diaphragm.
For models with PTFE diaphragms: Item (8) Santoprene
diaphragm is installed with the side marked “AIR SIDE” to-
wards the pump center body. Install the PTFE Diaphragm
with the side marked “FLUID SIDE”towards the fluid cap.
Recheck torque settings after pump has been restarted
and run awhile.
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Secure the diaphragm pump legs to a suitable surface to in-
sure against damage by vibration.
Viton and Hytrel are registered trademarks of the DuPont Company. Keynar is a registered trademark of Penwell Corp
®
®
®
®
Santoprene is a registered trademark of Monsanto Company, licensed to Advanced Elastomer Systems, L.P. Key-Lube is a registered trademark of Key Industries
®
®
6662AX-X-C
Page 3 of 8
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PARTS LIST / 6662AX-X-C FLUID SECTION
Fluid Section Service Kits include: Balls (see Ball Option, refer to -XX in chart below), Diaphragms (see Diaphragm Option, refer
to -XX in chart below), 937061 Key-Lube grease, plus “O” Ring items: 2, 3, 4, 19 and 33.
SEAT OPTIONS
6662XX-XXX-C
BALL OPTIONS
6662XX-XXX-C
(2-1/2” dia.) (Service Kit-XX)
“21”
“22”
-XXX Seat
-2XX 96849
Qty [Mtl]
-XXX Ball
Qty [Mtl] -XXX Ball
Qty [Mtl]
(4)
[SS]
[P]
-X1X 93358-1 (4)
-X2X 93358-2 (4)
-X3X 93358-3 (4)
-X4X 93358-4 (4)
[N]
[B]
[V]
[T]
-X5X 93358-5 (4)
[E]
[U]
-3XX 97171-1 (4)
-4XX 97171-2 (4)
-X8X 93358-8 (4)
-XEX 93358-A (4)
[K]
[SP]
-8XX 97179
(4)
[SH]
DIAPHRAGM OPTIONS 6662XX-XXX-C
SERVICE KIT
-XX = (Ball)
-XXX -XX = (Diaphragm) Diaphragm Qty [Mtl]
“7” / “8”
"3"
“4”
“19”
“33”
O” Ring
“O” Ring
(7/8” o.d.)
"O” Ring
(4” o.d.)
O” Ring
(3/4” o.d.)
(2-3/4” o.d.)
Qty [Mtl]
Qty [Mtl]
Qty [Mtl]
Qty [Mtl]
-XX1 637165-X1
-XX2 637165-X2
-XX3 637165-X3
-XX4 637165-X4
92755-1
94615-G
92755-3
(2) [N] Y325-16 (2) [B] Y325-208 (2) [B] Y325-342 (4) [B] Y325-230 (8)
(2) [B] Y325-16 (2) [B] Y325-208 (2) [B] Y325-342 (4) [B] Y325-230 (8)
(2) [V] Y328-16 (2) [T] Y328-208 (2) [T] Y327-342 (4) [V] Y327-230 (8)
[B]
[B]
[V]
[T]
94617 / 94616 (2) [T/SP] Y328-16 (2) [T] Y328-208 (2) [T] 95910
(4) [T] 93363-1
(4) [E] 92761
(8)
(8)
-XX5 637165-X5
-XX9 637165-X9
-XXB 637165-XB
92755-5
94615-9
94615-A
(2) [E] Y328-16 (2) [T] Y328-208 (2) [T] 95912
[E]
[V]
[E]
(2) [H] Y328-16 (2) [T] Y328-208 (2) [T] Y327-342 (4) [V] Y327-230 (8)
(2) [SP] Y328-16 (2) [T] Y328-208 (2) [T] 95912
(4) [E] 92761
(8)
MATERIAL CODE
[B] = Nitrile
[C] = Carbon Steel
[E] = E.P.R.
[H] = Hytrel
[K] = P.V.D.F. (Kynar)
[N] = Neoprene
[P] = Polypropylene
[SH] = Hard Stainless Steel
[SP] = Santoprene
[SS] = Stainless Steel
[T] = PTFE
MANIFOLD / FLUID CAP MATERIAL OPTIONS 6662XX-XXX-C
Polypropylene
6662X3-
P.V.D.F.
6662X4-
Item Description (size)
Diaphragm Nut
Qty Part No. [Mtl]
Part No. [Mtl]
ꢀ
6
(2) 93243-1
(2) 94905-1
(2) 932421
(2) 93241-1
(2) 93240-1
[P]
[P]
[P]
[P]
[P]
93243-2
93244-2
93242-2
93241-2
93240-2
[K]
15 Fluid Cap
[K]
[K]
[K]
[K]
(Top)
34 Manifold, Outlet
(Bottom)
35 Manifold, Foot
36 Swivel
[U] = Polyurethane
[V] = Viton
COMMON PARTS
Item Description (size)
Qty Part No. [Mtl]
Item
Description (size)
Qty Part No.
(20) 93359-1
(20) Y125-S
(8) 93357-1
(8) Y84-403-T
(8) Y12-4-S
(16) Y6-514-T
[Mtl]
[SS]
[SS]
[SS]
[SS]
[SS]
[SS]
(5/16”)
28 Washer
ꢀ
1
2
5
Rod
(1) 98720-1
(1) Y330-117
(2) 92752
[C]
[B]
(3/32” x 1” o.d.)
(5/16”-18)
"O” Ring
Plate
29 Nut
[C]
ꢀ
37 Clamp
(3/8”)
(1/4”-20 x 1-1/2”)
(1/4”-20)
24 Washer
(16) 93360-1
(8) Y6-68-T
(8) Y6-612-T
[SS]
[SS]
[SS]
38 Bolt
(3/8”-16 x 1-3/4”)
25 Bolt
26 Bolt
39 Nut
(3/8”-16 x 2-3/4”)
(5/16”-18 x 3-1/4”)
124 Bolt
Smart Parts”keep these items on hand in addition to the Service Kits for fast repair and reduction of down time.
ꢀ
Page 4 of 8
6662AX-X-C
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PARTS LIST / 6662AX-X-C FLUID SECTION
1
3
8
6
5
7
36
37
01
9
38
33
34
26
24
4
2
Torque Sequence
39
2
29
5
22
19
21
33
28
124
TAB
15
27
1
3
7
4
6
FORTHE
AIR MOTORSECTION
SEE PAGES 6& 7
22
19
21
33
VIEW FOR -XX4 (PTFE DIAPHRAGM) CONFIGURATION ONLY
PTFE
(White)
Santoprene
(Green)
8
7
24
35
25
36
33
TAB
Figure 2
Fluid
Side
Air
Side
COLOR CODE
DIAPHRAGM
COLOR
Blue (−)
Cream
Green(−)
Black
TORQUE REQUIREMENTS
BALL
COLOR
Air
Side
NOTE:DO NOT OVERTIGHTENFASTENERS
MATERIAL
E.P.R.
HYTREL
NEOPRENE
NITRILE
(6) Diaphragm Nut 65 - 70 ft. lbs (88.1 - 94.9 Nm), apply
Loctite 271 to threads.
(25, 26, 27 and 124) Fluid Caps/Manifold bolts 120 - 140 in. lbs.
(13.6 - 15. 8 Nm), apply Loctite Nickel Antiseize to threads.
(38) Bolts 40 - 45 in. lbs (4.5 - 5.1 Nm).
Blue(
N/ A
Green(
)
)
Fluid
Side
Red(
Red
)
POLYURETHANE N/A
SANTOPRENE
SANTOPRENE
(Backup)
PTFE
Cream
Green
Cream
N/ A
LUBRICATION / SEALANTS
Apply Key-Lube grease to all “O" rings,
“U" Cups & mating parts
White
Yellow(−)
(−)STRIPE
White
Yellow( )
VITON
CROSS SECTION VIEW OF DIAPHRAGMS
(
) DOT
6662AX-X-C
Page 5 of 8
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PARTS LIST / 6662AX-X-C AIR MOTOR SECTION
3
Indicates parts included in 637118-C Air Section Service Kit.
SERVICE KIT NOTE: Service Kit 637118-C is a general repair kit for all 1” and larger ARO diaphragm pump air motors. It contains extra O” Rings
and other parts that may not be needed to service this model.
Item
101
Description (size)
Qty Part No.
(1) 94744
[Mtl]
[A]
Item
Description (size)
Qty Part No.
(1) 92006
[Mtl]
[Z]
(6662AX-XXX-C)
Motor Body
ꢀ
116 Spacer
117 Gasket
(6662BX-XXX-C)
(1) 94742
(2) Y325-24
(1) 94528
(2) Y145-26
(8) Y6-42-T
[CI]
[B]
3
(1) 92004
(1) 93309-2
(4) 93075
(3) 115959
(2) 98723-2
(2) 94820
(4) Y154-41
(1) Y227-5-L
(1) Y43-5-C
(1) Y227-2-L
(3) 94987
(1) 93139
(2) Y17-51-S
(1) 93706-1
637175
[B/NY]
[C]
(1/16” x 11/4” o.d.)
3
ꢀ
3
102 O” Ring
103 Sleeve
118 Pilot Rod
119 “O” Ring
120 Spacer
(1/8” x 3/4” o.d.)
[D]
[C]
3
[U]
(1-5/32” i.d.)
104 Retaining Ring, TruArc
[Z]
(1/4”-20 x 5/8”)
105 Screw
[SS]
121 Sleeve Bushing
[Bz]
[U]
(1/4”)
(3/32” x 9/16” o.d.)
122 “O” Ring
106 Lockwasher
(8) Y14-416-T [SS]
3
3
(#8-32 x 3/8”)
107 Plate
(2) 93707-1
(1) 92878
(1) 92011
(1) Y186-51
(1) 92005
(1) 93047
(5) 92877
(5) Y325-214
(6) Y325-126
(4) 92876
[SS]
[B/NY]
[D]
123 Screw
[C]
(with notch)
(1/2 14 N.P.T. x 17/32”)
(3/4 14 N.P.T.)
3
ꢀ
3
108 Gasket
126 Pipe Plug
127 900 Street Elbow
[C]
109 Piston
[C]
(3/16” x 13/8” o.d.)
(1/8-27 N.P.T. x 1/4”)
110 “U” Cup
[B]
128 Pipe Plug
[C]
(6662AX-XXX-C)
(6662BX-XXX-C)
(1.557” o.d.)
(1/4”-20 x 1/4”)
ꢀ
111
Spool
[A]
195 Button Head Screw
201 Muffler
[SS]
[P]
[C]
(6662BX-X only)
ꢀ
3
3
ꢀ
112 Washer
113 “O” Ring
114 “O” Ring
115 Spacer
[Z]
231 Pipe Plug
Key-Lube “O” Ring Lubricant
Key-Lube Packets (10)
[SS]
(small) (1/8” x 1-1/4” o.d.)
(large) (3/32” x 1-9/16” o.d.)
[B]
3
[B]
[Z]
MATERIAL CODE
AIR MOTOR SECTION SERVICE
[A] = Aluminum
[B] = Nitrile
[Bz] = Bronze
[CI] = Cast Iron
[D] = Acetal
[NY] = Nylon
[SS] = Stainless Steel
[U] = Polyurethane
[Z] = Zinc
Service is divided into two parts − 1. Pilot Valve, 2. Major
Valve. GENERAL REASSEMBLY NOTES:
[C] = Carbon Steel
[P] = Polypropylene
Air Motor Section Service is continued from Fluid Section
repair.
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MAJOR VALVE DISASSEMBLY
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.
Take precautions to prevent cutting “O” rings upon instal-
lation.
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1. Remove (107) plate (or leg depending on model), (108
and 117) gaskets.
2. On the side opposite the air inlet, push on the inner di-
ameter (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) washers, etc. Check for damaged “O”rings.
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Lubricate “O”rings with Key-Lube grease.
Do not overtighten fasteners, refer to torque specification
block on view.
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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).
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.
PILOT VALVE REASSEMBLY
4. Lubricate and install (110) packing cup and insert (109)
piston into (air inlet side) cavity, the (110) packing cup
lips should point outward.
1. Replace two (102) “O” rings if worn or damaged and rein-
stall (103) sleeve.
5. Install (108) gasket and replace (107).
2. Install one of the (121) sleeve bushings, (119) “O” rings,
(120) spacers and the remaining (121) bushing.
3. Carefully push (118) pilot rod into bushings etc. and re-
tain on each end with the two (122) “O” rings, retain with
(123) screws.
4. Replace (104) retaining rings.
Page 6 of 8
6662AX-X-C
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.
PARTS LIST / 6662AX-X-C AIR MOTOR SECTION
IMPORTANT
BE CERTAIN TO ORIENT (115) SPACER LEGS
AWAY FROM BLOCKING INTERNAL PORTS
WHEN REASSEMBLING AIR SECTION.
117
105
106
111
116
115
114
113
112
107
MAJOR VALVE
See cross section detail Figure 3.
101
195
104
121
195
102
123
103
102
108
109
106
104
105
107
126
PILOT VALVE
11 9
11 0
123121
11 8
128
231
120
127
122
201
MAJOR VALVE CROSS SECTION DETAIL
11 4
109 11 0
11 3
112
115
111
116
TORQUE REQUIREMENTS
NOTE: DO NOT OVERTIGHTEN FASTENERS
(105) 40 50 in. lbs (4.5 5.6 Nm),
apply Loctite Nickel Antiseize to threads.
LUBRICATION / SEALANTS
Apply Key-Lube to all “O" rings, ”U" Cups & mating parts.
Apply Loctite 271 to threads.
Apply pipe sealant to threads.
Figure 3
Apply Dri-Loc 204 to threads.
6662AX-X-C
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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 diaphragm nut.
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 diaphragm nut.
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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.
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Check all joints on the inlet manifolds and suction con-
nections. These must be air tight.
Inspect the pump for solid objects lodged in the dia-
phragm chamber or the seat area.
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DIMENSIONAL DATA
All dimensions are given in inches and millimeters (mm).
2’’ A.N.S.I. Flange
11-15/16"" (302 mm)
11-9/16" (294 mm)
19-23/32" (501 mm)
4.773” (121 mm)
Bolt Circle
Outlet
AirInlet
1/2 14 N.P.T.F.
21-15/32"
(545 mm)
9-5/8"
(244 mm)
24-5/8"
(625 mm)
3-9/32"
(83 mm)
Inlet
1-1/32"
3-3/8"
8-11/16" (220 mm)
10-1/32" (255 mm)
5/8" (16 mm)
(26 mm)
(86 mm)
14-15/16" (379 mm)
Air exhaust thread 3/4 -14 N.P.T.
2’’ A.N.S.I. Flange
PN 97999-69
6662AX-X-C
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