OPERATOR’S MANUAL & SALES AND ENGINEERING DATA
RELEASED:
(REV. 01)
9-15-10
INCLUDING: SPECIFICATIONS, SERVICE KITS, GENERAL INFORMATION, TROUBLESHOOTING.
INCLUDE MANUALS: AF0442-XX Air Motor (pn 97999-1466), 1875AXXXXXX Lower Pump End (pn 97999-1582) &
S-632 General Information Manual (pn 97999-624).
4-1/4” AIR MOTOR
AF0409AX1XXXX-XX-X
9:1 RATIO
TWO-BALL PUMP SERIES
4” STROKE
Carbon Steel
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
PUMP DATA
Use only genuine ARO® replacement parts to assure compat-
ible pressure rating and longest service life.
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MODEL AF0409AX1XXXX-XX-X
637489 for repair of air motor section.
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K1875AXXXXXX for repair of lower pump end.
Refer to the chart on page 2 for description of “XXXXXX” options.
Air Inlet (female)
1/2 - 14 NPTF - 1
SPECIFICATIONS
(refer to option chart)
Model Series
. . . . . . . . . . . AF0409AX1XXXX-XX-X
AF0442-XX Air Motor
(see manual AF0442-XX)
Pump Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air Operated, Two-Ball
Double Acting Pump
Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9:1
Air Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AF0422-XX
Motor Repair Kit. . . . . . . . . . . . . . . . . . . . . . . 637489
Motor Diameter . . . . . . . . . . . . . . . . . . . . . . . 4-1/4”(10.8 cm)
Stroke (double acting). . . . . . . . . . . . . . . . . 4”(10.2 cm)
Air Inlet (female) . . . . . . . . . . . . . . . . . . . . . . . 1/2 - 14 NPTF - 1
Air Exhaust (female). . . . . . . . . . . . . . . . . . . . 1-1/4 - 11-1/2 NPTF - 1
Lower Pump End Series . . . . . . . . . . . . . . . . . . 1875AXXXXXXX
Lower Pump Repair Kit . . . . . . . . . . . . . . . . . . K1875AXXXXXXX
Material Outlet (female). . . . . . . . . . . . . . . . . . 3/4 - 14 NPTF - 1
“A”
Figure 1
Material Outlet (female)
3/4 - 14 NPTF - 1
“B”
PUMP PERFORMANCE
Air Inlet Pressure Range . . . . . . . . . . 0 - 150 p.s.i.g. (0 - 10.3 bar)
Fluid Pressure Range . . . . . . . . . . . . . 0 - 1350 p.s.i.g. (0 - 93.1 bar)
Maximum Rec'd Cycles / Minute . . . . . . . . . 75
“C”
1875AXXXXXX Lower Pump
(see manual 1875AXXXXXX)
Displacement In.3 Per Cycle . . . . . . . . . . . . . . 12.0
Volume / Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.65 oz. (196.8 ml)
Cycles Per Gallon . . . . . . . . . . . . . . . . . . . . . . . . 19.2
Material Inlet
Maximum Working Flow Rate. . . . . . . . . . . . 3.9 g.p.m. (14.8 l.p.m.)
Noise Level @ 60 p.s.i. - 40 c.p.m. . . . . . . . . 89.2 db(A)
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NOTE: Dimensions are shown in inches and (mm) and are supplied for reference only.
For more dimensions see page 3.
The pump sound pressure level has 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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(mm)
(mm)
(mm)
“A”
"B"
"C"
(284.2)
11.188"
(819.8)
(for -1 model)
(458.8)
32.277”
18.062"
34.397” (873.7)
18.062" (458.8)
11.188" (284.2)
IMPORTANT
This is one of four documents which support the pump. Re-
placement copies of these forms are available upon request.
AF0409AX1XXXX-XX-X Model Operator’s Manual (pn
97999-1490)
S-632 General Information - Industrial Piston Pumps (pn
97999-624)
1875AXXXXXX Lower Pump End Operator’s Manual (pn
97999-1582)
AF0422-XX Air Motor Operator’s Manual (pn 97999-1466)
:
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INGERSOLL RAND COMPANY LTD
209 NORTH MAIN STREET – BRYAN, OHIO 43506
© 2010
CCN 15333818
(800) 495-0276 FAX (800) 892-6276
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ꢀ
2. Remove the (5) retaining ring and (6) connector pin to release
the air motor piston rod from the lower pump piston rod.
GENERAL DESCRIPTION
3. Remove (4) spacer, (2) washer, four (3) packings, (2) washer and
(1) wavy spring washer from the air motor cavity (see figure 2).
The two-ball pump design provides for easy priming of the lower
foot valve. The double acting feature is standard in all ARO indus-
trial pumps. Material is delivered to the pump discharge outlet on
both the up and down stroke.
The motor is connected to the lower pump end by a spacer tube
and solvent cup. This allows for lubrication of the upper packing
gland and to prevent air motor contamination because of normal
wear and eventual leakage through the material packing gland. Be
sure the solvent cup is adequately filled with lubricant to protect
the upper packings and insure longest service life.
65968 Adapter Kit Assembly
1
2
4
6
3
HAZARDOUS PRESSURE. Do not exceed maximum
WARNING
operating pressure of 1350 p.s.i. (93.1 bar) at 150 p.s.i. (10.3
bar) inlet air pressure.
5
Pump Ratio X
Inlet Pressure to Pump Motor
=
Maximum Pump
Fluid Pressure
Pump ratio is an expression of the relationship between the pump motor area
and the lower pump end area. EXAMPLE: When 150 p.s.i. (10.3 bar) inlet pressure
is supplied to the motor of a 4:1 ratio pump, it will develop a maximum of 600
p.s.i. (41.4 bar) fluid pressure (at no flow) - as the fluid control is opened, the flow
rate will increase as the motor cycle rate increases to keep up with the demand.
Figure 2
Refer to general information sheet for additional
WARNING
safety precautions and important information.
NOTICE: Thermal expansion can occur when the fluid in the mate-
rial lines is exposed to elevated temperatures. Example: Material
lines located in a non-insulated roof area can warm due to sunlight.
Install a pressure relief valve in the pumping system.
Replacement warning label (pn 92325) is available upon re-
quest.
PARTS LIST
(size)
Item Description
Qty Part No.
(1) 90251
(2) 90568
(4) 90567
(1) 90570
(1) Y145-2
(1) 90572
1
2
3
4
5
6
Wavy Spring Washer
Washer
Packing
Spacer
TROUBLE SHOOTING
Retaining Ring
Connector Pin
Pump problems can occur in either the air motor section or the
lower pump end section. Use these basic guidelines to help deter-
mine which section is affected. Be sure to eliminate any possible
non-pump problems before suspecting pump malfunction.
REASSEMBLY
1. Assemble (1) wavy spring washer, (2) washer, four (3) packings,
(2) washer and (4) spacer into cavity in the air motor.
2. Assemble the lower pump piston rod to the air motor piston
rod, aligning the through holes.
3. Assemble the (6) connector pin through the hole, securing with
(5) retaining ring.
4. Screw the lower pump assembly to the air motor.
5. Screw the (90571) lock nut against the air motor base and
tighten.
Pump will not cycle.
No pressure to the motor. See motor manual.
Restricted return lines. Clean restriction.
Damaged motor. Service the motor.
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No material at the outlet (pump continually cycles).
Check the material supply, disconnect or shut off the air supply
and replenish the material, reconnect.
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TOP VIEW
Material on one stroke only (fast downstroke).
The lower check may not be seating in the foot valve (see lower
pump disassembly). Remove the check from the foot valve,
clean and inspect the valve seat area. If check or foot valve are
damaged, replace.
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1/2- 14 NPTF - 1
Air Inlet
C
Material outlet
L
47°
Material on one stroke only (fast downstroke).
The middle packings may be worn (see lower pump disassem-
bly). Replace the seals as necessary.
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20°
Material leakage out of the solvent cup or material appears on
the pump plunger rod.
Tighten the solvent cup until the leakage discontinues. If this
procedure does not aid in stopping the leakage problem, the
upper packings may be worn (see lower pump disassembly).
Replace the seals as necessary.
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PUMP CONNECTION - UPPER / LOWER
DISASSEMBLY
NOTE: All threads are right hand.
1. Loosen the (90571) lock nut and unscrew the entire pump from
the air motor. This will expose the (6) connector pin (see figure 2).
AF0409AX1XXXX-XX-X (en)
Page 3 of 4
PERFORMANCE CURVES
CYCLE PER MINUTE
0
400
50
300
100
150
200
250
350
1200
800
400
0
250
200
150
100
50
Performance based on 90 wt. gear oil at ambient temperature
120 PSI
120 PSI
100 PSI
100 PSI
70 PSI
70 PSI
40 PSI
40 PSI
0
0.00
2.50
5.00
7.50 10.00 12.50 15.00 17.50 20.00
U.S GALLONS PER MINUTE WATER DELIVER
CYCLE PER MINUTE
0
400
50
300
100
150
200
250
350
1200
800
400
0
250
200
150
100
Performance based on 90 wt. gear oil at ambient temperature
8.3 bar
8.3 bar
6.8 bar
6.8 bar
4.8 bar
4.8 bar
2.7 bar
2.7 bar
50
0
0.00
9.4
19.0
28.4
37.8 47.3
56.7 66.2
75.7
LITERS PER MINUTE WATER DELIVER
PN 97999-1492
AF0409AX1XXXX-XX-X (en)
Page 4 of 4
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