CCN 15263155
OPERATOR’S MANUAL NM2C23X-A1-XXX
INCLUDING: SPECIFICATIONS, SERVICE KITS, GENERAL INFORMATION, TROUBLESHOOTING.
INCLUDE MANUALS: 66506-B Air Motor (pn 97999-870), 6737X-XXX Lower Pump End (pn 97999-1207) &
S-632 General Information Manual (pn 97999-624).
RELEASED: 1-30-09
REVISED: 6-1-10
(REV. 02)

NM2C23X-A1-XXX

TWO-BALL PUMP SERIES

300 and 400 Series Stainless Steel

12” AIR MOTOR
23:1 RATIO
6” STROKE

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.

MODEL NM2C23X-A1-XXX

“A”“B”“C”“A”“B”“C”

SERVICE KITS

Use only genuine ARO® replacement parts to assure compat-
ible pressure rating and longest service life.
637112 for repair of air motor section.
637444-XXD for repair of lower pump end. Refer to the chart
on page 2 for description of -XXD options.

SPECIFICATIONS

Model Series (refer to option chart) . . . . . . . . . . . NM2C23X-A1-XXX
Pump Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air Operated, Two-Ball
Double Acting Pump
Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23:1
Air Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66506-B
Motor Repair Kit . . . . . . . . . . . . . . . . . . . . . . . 637112
Motor Diameter . . . . . . . . . . . . . . . . . . . . . . . 12” (30.5 cm)
Stroke (double acting) . . . . . . . . . . . . . . . . . 6” (15.2 cm)
Air Inlet (female) . . . . . . . . . . . . . . . . . . . . . . . 3/4 - 14 NPTF - 1
Air Exhaust (female). . . . . . . . . . . . . . . . . . . . 1-1/4 - 11-1/2 NPSM
Lower Pump End Series . . . . . . . . . . . . . . . . . . 6737X-XXX
Lower Pump Repair Kit . . . . . . . . . . . . . . . . 637444-XXD
Material Outlet (female) . . . . . . . . . . . . . . . 1-1/4 - 11-1/2 NPTF - 2
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 lbs (90.7 kgs)
PUMP PERFORMANCE
Air Inlet Pressure Range . . . . . 30 - 90 p.s.i.g. (2.1 - 6.2 bar)
Fluid Pressure Range . . . . . . . . 690 - 2070 p.s.i.g. (47.6 - 142.8 bar)
Maximum Rec'd Cycles / Minute . . . . . . . . . 70
Displacement In.3 Per Cycle . . . . . . . . . . . . . . 59.8
Volume / Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . 33.1 oz. (979.6 ml)
Cycles Per Gallon . . . . . . . . . . . . . . . . . . . . . . . . 3.86
Flow @ 70 Cycles / Minute . . . . . . . . . . . . . . . . 18.1 g.p.m. (68.6 l.p.m.)
Noise Level @ 60 p.s.i. - 40 c.p.m.c . . . . . . 89.8 db(A)d
Accessories Available . . . . . . . . . . . . . . . . 66542 Wall Mount Bracket
65139 Floor Mount
66718 Silencer
c
Tested with 66718 silencer installed.
d
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.
y
y
y
Air Inlet (female)
3/4 - 14 NPTF - 1 (not shown)
Material Outlet (female)
1-1/4 - 11-1/2 NPTF - 2
(90° from air exhaust)
66506-B Air Motor
(see manual 66506-B)
6737X-XXX Lower Pump
(see manual 6737X-XXX)
Spacer Section
Air Exhaust (female)
1-1/4 - 11-1/2 NPSM
Connector (see  gure 2)
Y6-128-C Hex Cap Screw (6)
Y14-750-K Lock Washer (6)
96618 Hose Clamp
c
96617 Hose
c
76354 Cap
c
F22-48 Seal
c
96616 Stem
c
6045 Fitting
c
Y43-41-C Coupling
c
Y44-3-C Nipple
c
93866 Spacer Rod (3)
Y227-2-L Pipe Plug (3)
c
c
Items included in models
NM2C23X-A1-X3X, -X6X,
-XCX and -XDX only.
Figure 1
NOTE: Dimensions are shown in inches and (mm) and are supplied for reference only.
“A” (mm) "B"
(mm) "C"
(mm)
50-5/16” (1278.0) 30-7/16”
(773.1) 18-7/8”
(479.5)
IMPORTANT
This is one of four documents which support the pump. Re-
placement copies of these forms are available upon request.
: NM2C23X-A1-XXX Model Operator’s Manual (pn 97999-1209)
S-632 General Information - Air / Hydraulic Operated Piston
Pumps (pn 97999-624)
6737X-XXX Lower Pump End Operator’s Manual (pn 97999-1207)
66506-B Air Motor Operator’s Manual (pn 97999-870)
INGERSOLL RAND COMPANY LTD
209 NORTH MAIN STREET – BRYAN, OHIO 43506
(800) 495-0276 FAX(800) 892-6276 © 2010
www.ingersollrandproducts.com