OPERATOR’S MANUAL
650719-C
8-11-03
RELEASED:
REVISED:
(REV. 08)
INCLUDING: OPERATION, INSTALLATION & MAINTENANCE
12-3-10
2" DIAPHRAGM PUMP
U.L. LISTED, 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
637118-C for air section repair (see page 6).
637138-63 for fluid section repair (see page 4).
PUMP DATA
Models. . . . . . . . . . . . . . . . . . . 650719-C
Application . . . . . . . . . . . . . . Diesel Fuel, Kerosene, Aviation
Fuel, Fuel Oil and Unleaded Fuel
Pump Type. . . . . . . . . . . . . . . U.L. Listed Metallic Air Operated
Double Diaphragm for use with
Petroleum Product Dispensing
Systems
Material. . . . . . . . . . . . . . . . . . see Model Description Chart
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58.44 lbs (26.5 kgs)
Maximum Air Inlet Pressure . . . . . . . . 50 p.s.i.g. (3.4 bar)
Maximum Outlet Pressure . . . . . . . . . . 50 p.s.i.g. (3.4 bar)
(flooded inlet)
Maximum Flow Rate
. . . 75 g.p.m. (283.9 l.p.m.)
Displacement / Cycle @ 100 p.s.i.g. . 0.64 gal. (2.42 lit.)
Maximum Particle Size . . . . . . . . . . . . . 1/4”dia. (6.4 mm)
Maximum Temperature Limits (diaphragm / ball / seal /
seat material)
Acetal . . . . . . . . . . . . . . . . . . . . 10° to 180° F (-12° to 82° C)
Kynar® PVDF. . . . . . . . . . . . . . 10° to 200° F (-12° to 93° C)
Viton® . . . . . . . . . . . . . . . . . . . . -40° to 350° F (-40° to 177° C)
Dimensional Data. . . . . . . . . . . . . . . . . . . see page 8
Figure 1
Noise Level @ 70 p.s.i., 60 c.p.m.. . . . . . 77.7 db(A)
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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.
c
65071 9 - C
Diaphragm Material
9 - Viton
Center Body Material
Aluminum
Fluid Connection
2 - 11-1/2 N.P.T.F. - 1
Fluid Cap / Manifold Material, Hardware
Aluminum / Aluminum, Steel hardware
Seat Material
Kynar PVDF
Ball Material
Acetal
INGERSOLL RAND COMPANY LTD
209 NORTH MAIN STREET – BRYAN, OHIO 43506
(800) 495-0276 FAX(800) 892-6276
© 2010
CCN 15201445
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Notice that the material inlet / outlet manifolds may be
removed and rotated 180° to facilitate various mounting
applications.
If the body of the pump must be rotated, remove the end
covers and manifolds and index it so the bolts line up
properly. NOTE: The arrow on the end caps must always
point upward for optimum performance.
When the diaphragm pump is used in a force-feed situa-
tion, it is recommended that a check valve be installed at
the air inlet to keep material out of air line in the event of
diaphragm failure.
Secure diaphragm pump legs to a suitable surface to in-
sure against damage by excessive vibration.
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GENERAL DESCRIPTION
The ARO U.L. listed pump for pumping petroleum products,
offers high volume delivery even at low air pressures and
easy self-priming. This model is designed specifically for
transfer, bulk unloading or fueling applications. It includes a
pressure relief valve (per U.L. Specification 79) which restricts
the fluid outlet pressure to under 50 p.s.i. (3.4 bar). The relief
valve can be plumbed to return the bleed off fuel to the stor-
age container.
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AIR AND LUBE REQUIREMENTS
WARNING EXCESSIVE AIR PRESSURE. Can cause pump
and property damage. The air supply must be limited
to 50 p.s.i.g. (3.4 bar) maximum inlet air pressure.
OPERATING INSTRUCTIONS
The air supply line or hose to the pump should be ad-
equately sized to carry a sufficient volume of air to the
pump. The material inlet supply tubing should not be too
small or restrictive which will inhibit material flow. The
outlet material volume is governed not only by the air
supply but also by the material volume available at the
inlet.
Air supply provided should be filtered to provide clean
dry air. A filter capable of filtering out particles larger
than 50 microns should be used on the air supply. There
is no lubrication required other than the “O”ring lubricant
which is applied during assembly or repair.
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The pump should never be operated at pressures exceed-
ing 50 p.s.i.g. (345 kPa) inlet air pressure. This pump is
equipped with a pressure relief valve on the material out-
let manifold which will open at 40 +/-4 p.s.i. (2.76 bar) to
relieve pressure increases in the outlet hoses / plumbing
caused by thermal expansion or other external forces.
Disconnect the air supply from the pump if it is to be in-
active for a few hours.
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MAINTENANCE
Refer to the part views and descriptions as provided on
pages 4 through 7 for parts identification and service kit in-
formation.
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.
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
diaphragm pump functions: 1. AIR SECTION, 2. FLUID
SECTION. 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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INSTALLATION
IMPORTANT
Requirements for the installation are included in the
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Flammable and Combustible Liquids Code, NFPA No. 30,
Automotive and Marine Service Station Code, NFPA No.
30A and the National Electric Code, ANSI / NFPA No. 70.
A fluid return hose which is compatible with the fluid be-
ing pumped must be installed to the relief valve on the
outlet manifold to return fluid back to the supply tank or
pump inlet.
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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.
The pump must be grounded to prevent static discharge.
Grounding may be accomplished through the legs or to
the ground lug provided on 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 Henkel Loctite Corporation
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Kynar® is a registered trademark of Arkema Inc. Viton® is a registered trademark of the DuPont Company
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650719-C (en)
Page 3 of 8
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PARTS LIST / 650719-C FLUID SECTION
637138-63 fluid section service kits include: Balls (item 22), diaphragms (item 7) plus items 2, 3, 19 and 93706-1 Key-Lube grease
(page 6).
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PARTS LIST
(size)
(size)
Item Description
Qty Part No.
(1) 98720-1
(1) Y330-117
(4) Y327-16
(2) 92752
[Mtl]
Item Description
Qty Part No.
(4) Y327-230
(4) 92942
[Mtl]
[V]
[K]
(1/8” x 2-3/4” o.d.)
1
2
3
5
6
7
9
Rod
[C]
19 “O” Ring
21 Seat
o
n
n
n
(3/32” x 1” o.d.)
“O” Ring
“O” Ring
[B]
(1/16” x 3/4” o.d.)
(1-3/4” diameter)
[V]
[C]
22 Ball
26 Bolt
27 Bolt
29 Nut
32 Leg
(4) 92757-6
(8) Y6-66-C
(4) Y6-510-C
(20) Y12-5-C
(2) 92759
[D]
[C]
n
(3/8” - 16 x 1-1/4”)
Plate - air side
Plate - fluid side
Diaphragm
(5/16" - 18 x 2-1/4”)
(5/16" - 18)
(2) 92752
[C]
[C]
o
n
(2) 92755-3
(2) 93065
[V]
[SS]
[SS]
[A]
[C]
(0.630” i.d.)
Washer
[C]
(5/8” - 18 x 1-1/2”)
(see page 7)
14 Screw
15 Fluid Cap
(2) Y5-107-T
(2) 92750
43 Ground Lug
(1) 93004
[Co]
[C]
(5/16" - 18 x 2”)
59 Bolt
(16) 93608
(1) 96333
(top with valve port)
(bottom)
Manifold
Manifold
(1) 93129
[A]
81 Relief Valve
[Br]
16
(1) 92855
[A]
Service Note: Part number 98931-T installation tool is available separately for use with items (1) and (2).
MATERIAL CODE
[A]
[B]
[Br]
[C]
=
=
=
=
Aluminum
Nitrile
Brass
“Smart Parts”, keep these items on hand in addition to the service kit for fast repair and reduction of down time.
Service Kit Note: Extra “O”rings are included in kits to service models built prior to December 1989.
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p
Carbon Steel
[Co] = Copper
[D]
[K]
[SS]
[V]
=
=
=
=
Acetal
Kynar PVDF
Stainless Steel
Viton
FLUID SECTION DISASSEMBLY
FLUID SECTION REASSEMBLY
1. Remove top manifold(s).
2. Remove (22) balls, (19) “O”rings and (21) seats.
3. Remove (15) fluid caps.
Reassemble in reverse order.
Clean and inspect all parts. Replace worn or damaged
parts with new parts as required.
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4. Remove (14) screw, (9) washer, (3) “O” ring, (6) plate, (7)
diaphragm and (5) plate.
Lubricate (1) diaphragm rod and (2) “O” ring with Key-
Lube “O”ring lube or equivalent.
Use ARO pn 98931-T bullet (installation tool) to aid in in-
stallation of (2) “O”ring on (1) diaphragm rod.
Be certain (7) diaphragms align properly with (15) fluid
caps before making final torque adjustments on bolt and
nuts to avoid twisting the diaphragm.
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5. Remove (3) “O”rings.
NOTE: Do not scratch or mar the surface of (1) diaphragm
rod.
Re-check torque settings after pump has been re-started
and run a while.
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Page 4 of 8
650719-C (en)
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PARTS LIST / 650719-C FLUID SECTION
1
4
3
2
FOR THE AIR MO-
TOR SECTION, SEE
PAGES 6 & 7.
8
6
5
7
10
9
ꢃ
81
16
26
Torque Sequence
ꢁ
29
ꢁ
1
ꢀ
2
ꢀ
3
ꢀ
5
ꢄ
7
3
ꢀ
14 ꢁꢂ
22
19
21
ꢀ
15
59
27
Tab
6
ꢄ
9
22
21
19
ꢀ
16
32
26
ꢁ
Figure 2
ASSEMBLY TORQUE REQUIREMENTS
)
(
NOTE: DO NOT OVERTIGHTEN FASTENERS.
(14) Diaphragm screw, 65 - 70 ft. lbs (88.1 - 94.9 Nm).
(26) Bolt, 240 - 280 in. lbs (27.1 - 31.6 Nm).
(29) Nut, 120 - 140 in. lbs (13.6 - 15.8 Nm).
LUBRICATION / SEALANTS
Fluid side
Air side
Apply Key-Lube grease (93706-1) to all “O” rings, “U” cups and
mating parts.
c
Apply Loctite® 271™ to threads.
Apply gasolene-resistant pipe sealant to pipe threads.
d
g
Cross section view of diaphragm.
650719-C (en)
NOTICE: Radius edge of parts (5 and 6) is against diaphragm.
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PARTS LIST / 650719-C AIR MOTOR SECTION
Indicates parts included in 637118-C air section repair kit.
q
AIR MOTOR PARTS LIST
(size)
(size)
Item Description
(Qty) Part No.
(1) 93161
(2) 92960
(1) 94528
(2) Y145-26
(8) 93860
(2) 93707-1
(1) 92878
(1) 92011
(1) Y186-51
(1) 92005
(5) 92877
(5) Y325-214
(6) Y325-126
(4) 92876
(1) 92006
(1) 92004
[Mtl]
Item Description
(Qty) Part No.
(1) 93309-2
(4) 93075
[Mtl]
[C]
(includes items 195)
101 Motor Body
[A]
118 Pilot Rod
(0.07” x 1.25” o.d.)
(1/8” x 3/4” o.d.)
102 “O” Ring
103 Sleeve
[B]
119 “O” Ring
120 Spacer
[U]
[Z]
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o
q
q
[D]
(3) 115959
(2) 98723-2
(2) 94820
(1-5/32 i.d.)
104 Retaining Ring
105 Screw / Washer
107 Plate
[C]
121 Sleeve Bushing
[Bz]
[U]
[C]
(1/4” - 20 x 5/8”)
(3/32” x 9/16” o.d.)
122 “O” Ring
[C]
q
q
(#8 - 32 x 3/8”)
[SS]
[B/Ny]
[D]
123 Screw
(4) Y154-41
(1) Y227-5-L
(1) Y43-5-C
(1) Y227-2-L
(2) 94987
(with notch)
(1/2 - 14 N.P.T. x 17/32”)
(3/4 - 14 N.P.T.)
108 Gasket
109 Piston
110 “U” Cup
111 Spool
112 Washer
126 Pipe Plug
[C]
q
o
q
o
127 90° Street Elbow
[C]
(3/16” x 1-3/8” o.d.)
(1/8 - 27 N.P.T. x 1/4”)
[B]
128 Pipe Plug
[C]
(1/4” - 20 x 1/4”)
(1/4” - 20 x 3/8”)
[A]
195 Button Head Screw
196 Button Head Screw
201 Muffler
[SS]
[SS]
[C]
(1.556” o.d.)
[Z]
(1) 94987-1
(1) 350-568
(1/8” x 1-1/4” o.d.)
113 “O” Ring
114 “O” Ring
115 Spacer
116 Spacer
117 Gasket
[B]
q
q
o
o
q
(3/32” x 1-9/16” o.d.)
[B]
[Z]
Key-Lube “O” Ring Lubricant
Key-Lube, 10 Pack
(1) 93706-1
637175
q
[Z]
[B/Ny]
“Smart Parts”, keep these items on hand in addition to the service kit for fast repair and reduction of down time.
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MATERIAL CODE
PILOT VALVE REASSEMBLY
[A]
[B]
[Bz]
=
=
=
Aluminum
Nitrile
Bronze
[C]
[D]
=
=
Carbon Steel
Acetal
[SS]
[U]
[Z]
=
=
=
Stainless Steel
Polyurethane
Zinc
1. Replace two (102) “O”rings, if worn or damaged, and rein-
[Ny] = Nylon
stall (103) sleeve.
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 bushing etc. and retain
on each end with the two (122)“O”rings. Retain with (123)
screws.
AIR MOTOR SECTION SERVICE
Service is divided into two parts - 1. Pilot Valve, 2. Major
Valve.
GENERAL REASSEMBLY NOTES:
4. Replace (104) retaining rings.
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 and (108 and 117) gaskets.
2. On the side opposite the air inlet, push on the inner di-
ameter 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)
washers, etc. Check for damaged “O”rings.
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Lubricate “O”rings with Key-Lube grease or equivalent.
Do not over-tighten fasteners. Refer to torque specifica-
tion 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.
NOTE: Replace worn parts as necessary. Lubricate “O”
rings with Key-Lube or equivalent when reassembling.
1. Replace (112) washer, (114) “O” ring and (113) “O” ring
onto (115) spacer and insert etc. NOTE: Be careful to ori-
ent spacer legs away from blocking internal ports.
2. Lubricate and carefully insert (111) spool.
2. Remove (123) screws and (122) “O”rings.
3. Remove (118) pilot rod, (121) sleeve bushing, (119) “O”
rings and (120) spacers from the (101) motor body.
4. Remove (103) sleeve and (102) “O”rings.
3. Install (117) gasket and (107) plate.
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) plate.
Page 6 of 8
650719-C (en)
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PARTS LIST / 650719-C AIR MOTOR SECTION
IMPORTANT
BE CERTAIN TO ORIENT (115) SPACER LEGS
AWAY FROM BLOCKING INTERNAL PORTS
WHEN REASSEMBLING AIR SECTION.
ꢀ
111
115
116
105
117
107
ꢁ
ꢀ
114
ꢀ
113
112
MAJOR VALVE
See cross section detail, figure 4.
101
195
104
123
121
43
Figure 3
ꢂ
ꢅ
195
ꢂ
102
103
104
ꢀ
ꢀ
ꢂ
196
ꢆ
105
107
126
119
ꢀ
PILOT VALVE
121
108
109
110
123
118
122
ꢅ
ꢀ
ꢀ
ꢀ
128
120
201
127
MAJOR VALVE CROSS SECTION DETAIL
109 110 112 114 115 113 111 116
ꢀ
ꢀ
ꢀ
) ASSEMBLY TORQUE REQUIREMENTS (
NOTE: DO NOT OVERTIGHTEN FASTENERS.
(105) Screws, 40 - 50 in. lbs (4.5 - 5.6 Nm).
LUBRICATION / SEALANTS
c
Apply Key-Lube grease to all “O” rings, “U” cups and
mating parts.
Figure 4
d
e
f
Apply Loctite 271 to threads.
Apply Loctite 262™ to threads.
Apply Loctite 572™ to threads.
650719-C (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 (14) 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 manifolds and fluid caps.
Check tightness of (14) 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.
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Check all joints on the intake 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
Dimensions shown are for reference only, they are displayed in inches and millimeters (mm).
N
(air inlet)
Q
(pressure relief valve)
M
(material outlet)
E
A
F
B
G
L
D
H
K
J
C
P
(air exhaust)
M
(material inlet)
DIMENSIONS
A - 13-1/8”(333.4 mm)
B - 18-3/8”(466.7 mm)
C - 9”(228.6 mm)
D - 2-3/4”(69.9 mm)
E - 14-13/16”(376.2 mm)
F - 11-1/2”(292.1 mm)
G - 19-13/16”(502.8 mm)
H - 10-3/4”(273 mm)
J - 12”(305 mm)
L - 7-5/8”(193.7 mm)
M - 2 - 11-1/2 N.P.T.F. - 1
N - 1/2 - 14 N.P.T.F. - 1
P - 3/4 - 14 N.P.T.F. - 1
Q - 1/4 - 18 N.P.T.
Figure 5
K - 17/32”(13.5 mm)
PN 97999-1066
650719-C (en)
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