Ingersoll-Rand ARO LM2250E-B3 Series Operator'S Manual Download Page 2

Page 2 of 4 

LM2250E-XX-B3 (en)

PARTS LIST / LM2250E-XX-B3

Item Description 

(size)

(Qty) Part No.

Mtl

1 Carriage Bolt 

(1/4” - 20 x 9”)

(4)

94333

[C]

2 Upper Cap

(1)

94307

[Z]

c

 3 Gasket

(2)

94311

[B]

4 Sleeve

(2)

94316

[Br]

c

 5 “O” Ring 

(1/16” x 11/16” o.d.)

(4)

Y325-15

[B]

c

 6 “O” Ring 

(1/8” x 3/4” o.d.)

(4)

Y325-206

[B]

7 Spool

(2)

94310

[D]

c

 8 “U” Cup 

(1/8” x 3/4” o.d.)

(2)

Y240-7

[B]

c

 9 “O” Ring 

(0.106” x 0.587” o.d.)

(2)

15066-PM

[B]

10 Cylinder

(1)

94249

[A]

11 Adapter

(1)

94447-1

[C]

c

 12 “O” Ring 

(1/16” x 3/4” o.d.)

(1)

Y325-16

[B]

c

 13 “O” Ring 

(1/16” x 7/16” o.d.)

(1)

Y325-11

[B]

14 Muffl

  er Housing

(1)

94443

[A]

15 Foam Liner

(2)

94402

[U]

16 Retaining Ring

(1)

94406

[C]

17 Washer

(1)

94515

[C]

c

 18 “U” Cup 

(3/16” x 2” o.d.)

(2)

Y240-23

[B]

19 Piston

(1)

94780

[D]

20 Piston Adapter

(1)

94388

[C]

c

 21 “O” Ring 

(3/32” x 1” o.d.)

(1)

Y325-117

[B]

22 Dowel Pin 

(1/4” o.d. x 7/8” long)

(1)

Y148-37

[C]

c

 23 “O” Ring 

(3/32” x 13/16” o.d.)

(1)

Y325-114

[B]

c

 24 Rod Seal

(1)

95139

[U]

25 Washer

(1)

94785

[C]

26 Spring

(1)

94705

[C]

27 Base

(1)

67241-1

[C/Z]

28 Nut 

(1/4” - 20)

(4)

93828

[SS]

29 Ground Screw 

(#10 - 32 x 1/4”)

(1)

93005

[C]

c

 30 Gasket

(1)

70834

[Co]

31 Extension Tube

models LM2250E-22-B3 (7.531”)

(1)

94401-2

[C]

models LM2250E-32-B3 (20.281”)

(1)

94401-7

[C]

models LM2250E-42-B3 (28.781”)

(1)

94401-8

[C]

models LM2250E-62-B3 (10.281”)

(1)

94401-6

[C]

Item Description 

(size)

(Qty) Part No.

Mtl

c

 32 Gasket

(1)

70837

[Co]

33 Piston Rod

(1)

95137

[C]

34 Pin

(1)

94786

[C]

c

 35 Cotter Pin 

(1/16” x 1/2” long)

(1)

Y15-21

[C]

36 Connector

models LM2250E-22-B3 (3.457”)

(1)

94340-2

[C]

models LM2250E-32-B3 (16.207”)

(1)

94340-7

[C]

models LM2250E-42-B3 (24.707”)

(1)

94340-8

[C]

models LM2250E-62-B3 (6.207”)

(1)

94340-6

[C]

Piston and Tube Assembly 

(includes 

items 37 - 40 and 49)

(1)

67262

37 Lower Suction Tube

(1)

[C]

38 Plunger

(1)

[C]

39 Ball Stop

(1)

83276

[C]

40 Ball 

(9/32” dia.)

(1)

Y16-209

[C]

c

 41 Guide Washer

(1)

95131

[Co]

42 Spacer

(1)

72392-1

[C]

c

 43 Retaining Ring 

(0.877” o.d.)

(1)

76243-1

[C]

c

 44 “U” Cup 

(1/8” x 13/16” o.d.)

(1)

Y186-54

[B]

c

 45 Guide

(1)

95132

[T]

46 Foot Valve Body

(1)

95133

[SH]

Foot Valve Assembly 

(includes items 43 - 46)

(1)

67242

c

 47 Gasket

(1)

F21-65

[Co]

48 Valve Seat

(1)

6797

[C]

49 Primer Rod

(1)

95134

[C]

50 Primer

(1)

94400

[C]

c

 51 Retainer Ring

(1)

94397

[C]

52 Primer Tube

(1)

753750

[C]

53 Grease Filter

(1)

753751

[SS]

54 Internal Circlip

(1)

753752

[C]

55 Bung Assembly 

(includes item 56)

(1)

67145-2

[ZA]

56 Thumb Screw 

(1/4” - 20 x 1”)

(3)

Y66-59-C

[C]

c

Gadus S2 U1000 Grease Packet

(1)

94833

c

Items included in repair kit

637332

OPERATING AND SAFETY PRECAUTIONS

WARNING

 EXCESSIVE INLET PRESSURE. Can cause explo-

sion, resulting in severe injury or death. Do not exceed 
maximum operating pressure of 7500 p.s.i. (517 bar) at 150 
p.s.i. (10.3 bar) inlet pressure. Do not run pump without us-
ing a regulator to limit air supply pressure to the pump.

WARNING

 EXCESSIVE MATERIAL PRESSURE. Can cause 

equipment failure, resulting in severe injury or property 
damage. Do not exceed the maximum material pressure of 
any component in the system.

Replacement warning label (pn 94520) is available upon re-
quest.

 

Pump Ratio X 

Maximum Pump

 

Inlet Pressure to Pump Motor 

 

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) fl uid pressure (at no fl ow) - as the fl uid control is opened, the fl ow rate 
will increase as the motor cycle rate increases to keep up with the demand.

WARNING

 Refer to the general information manual in-

cluded for additional operating and safety precautions and 
other important information.

NOTICE: Thermal expansion can occur when the fl uid 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.

y

 ARO® is a registered trademark of Ingersoll Rand Company 

y

 Gadus® is a registered trademark of the Shell Oil Company 

y

Reviews: