Ingersoll-Rand ARO LM2250E-B3 Series User manual

INGERSOLL RAND COMPANY LTD
209 NORTH MAIN STREET – BRYAN, OHIO 43506
[phone] yFAX [phone] © 2011 CCN 15292261
www.ingersollrandproducts.com
OPERATOR’S MANUAL LM2250E-XX-B3
INCLUDING: SPECIFICATIONS, SERVICE KITS, GENERAL INFORMATION, TROUBLESHOOTING.
INCLUDE MANUALS: S-632 General Information Manual (pn 97999-624).
RELEASED: 6-18-08
REVISED: 8-1-11
(REV. 04)
LM2250E-XX-B3
CHOP-CHECK GREASE PUMP
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.
2” AIR MOTOR
50:1 RATIO
0 - 7500 P.S.I. RANGE
"A"
"B"
1-1/4"
(31.3 mm)
SERVICE KITS
Use only genuine ARO® replacement parts to assure compat-
ible pressure rating and longest service life.
637332 pump rebuild kit. Includes the necessary soft parts for
normal service of the entire pump.
SPECIFICATIONS
Model Series
(refer to option chart)
. . . . . . . . . . . LM2250E-XX-B3
Pump Type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air Operated, Chop-
Check Grease Pump
Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50:1
Air Motor Diameter . . . . . . . . . . . . . . . . . . . . . . 2”(5.08 cm)
Stroke (double acting) . . . . . . . . . . . . . . . . . . . 3” (7.62 cm)
Air Inlet (female) . . . . . . . . . . . . . . . . . . . Rp 1/4 (1/4 - 19 BSP Parallel)
Material Outlet (female). . . . . . . . . . . . Rc 3/8 (3/8 - 19 BSP Taper)
Pump Construction . . . . . . . . . . . . . . . . . . . . . . Carbon Steel
Dimensional Data. . . . . . . . . . . . . . . . . . . . . . . . see chart
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see chart
PUMP PERFORMANCE
Air Inlet Pressure Range . . . . . . . . . . . 0 - 150 p.s.i.g. (0 - 10.3 bar)
Fluid Pressure Range . . . . . . . . . . . . . . 0 - 7500 p.s.i.g. (0 - 517.2 bar)
Cycles / Minute Rec’d @ Working Flow . . . 80
Displacement In. Per Cycle . . . . . . . . . . . . . . 0.300
Volume / Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.17 oz. (4.91 ml)
Maximum Delivery / Minute . . . . . . . . . . . . . 9 lbs (4.1 kgs)
Noise Level @ 100 p.s.i. . . . . . . . . . . . . . . . . . . 85.0 db(A)c
Accessories Available . . . . . . . . . . . . . . . . 61113 Wall Mount Bracket
66073-1 Air Line Connection Kit
c
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.
GENERAL DESCRIPTION
Model LM2250E-XX-B3 series chop-check grease pump is intended
to be used primarily for grease delivery systems. It uses carbon
steel and other materials which make it compatible with most pe-
troleum based lubrication products.
NOTE: If this pump was purchased separately (not part of a system),
consult your sales representative for compatible dispensing acces-
sories which will best match the application. All accessories must
be able to withstand the maximum pressure developed by the
pump.
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PUMP DATA
Figure 1
MODEL LM2250E-XX-B3
NOTE: Dimensions are shown in inches and (mm) and are supplied for reference only.
Air Inlet (female)
Rp 1/4 (1/4 - 19 BSP parallel)
Material Outlet (female)
Rc 3/8 (3/8 - 19 BSP taper)
2 - 11-1/2 N.P.S.M.
Model Number "A"
(mm)
"B"
(mm)
Weight
(kg)
LM2250E-22-B3 27-3/4"
(704.2)
16-9/16"
(420.6)
15 lbs
(6.8)
LM2250E-32-B3 40-1/2"
(1028.1)
29-5/16"
(744.5)
19 lbs
(8.6)
LM2250E-42-B3 49"
(1244.0)
37-13/16"
(960.4)
21.5 lbs
(9.8)
LM2250E-62-B3 30-1/2"
(774.1)
19-5/16"
(490.5)
15.9 lbs
(7.2)
IMPORTANT
This is one of two documents which support the pump. Re-
placement copies of these forms are available upon request.
:LM2250E-XX-B3 Model Operator’s Manual (pn 97999-1343)
S-632 General Information - Air Operated Lubrication Piston
Pumps (pn 97999-624)
5/16” (8 mm) thru hole

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 Mu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) uid pressure (at no ow) - as the uid control is opened, the 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 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.
yARO® is a registered trademark of Ingersoll Rand Company yGadus® is a registered trademark of the Shell Oil Company y

LM2250E-XX-B3 (en) Page 3 of 4
PARTS LIST / LM2250E-XX-B3
32
37 
33
30
31 
38
40
42
44
46
36 
52 
53
54
56
48
49 
51
55
34
39
41
43
45
35
47
50
3
4
10
1
2
8
7
6
20
9
28 
27
24
25
26
21
23
8
9
5
13
12
11
6
7
4
16
17
18
19
18
14
15
5
22
3
29
)ASSEMBLY TORQUE REQUIREMENTS (
NOTE: DO NOT OVERTIGHTEN COMPONENTS.
(11) adapter, 70 - 80 in. lbs (7.9 - 9.0 Nm).
(28) nut, 80 - 90 in. lbs (9.0 - 10.2 Nm).
(31) extension tube, 65 - 75 ft lbs (88.1 - 101.7 Nm).
(36) connector, 17 - 25 ft lbs (23.0 - 33.9 Nm).
(37) lower suction tube, 65 - 75 ft lbs (88.1 - 101.7 Nm).
(49) primer rod, 70 - 100 in. lbs (7.9 - 11.3 Nm).
(52) primer tube, 65 - 75 ft lbs (88.1 - 101.7 Nm).
MATERIAL CODE
[A] = Aluminum [SH] = Hard Stainless Steel
[B] = Nitrile [SS] = Stainless Steel
[Br] = Brass [T] = PTFE
[C] = Carbon Steel [U] = Polyurethane
[Co] = Copper [Z] = Zinc
[D] = Acetal [ZA] = Zinc / Aluminum Alloy
Figure 2

Page 4 of 4 LM2250E-XX-B3 (en)
PN 97999-1343
PUMP DISASSEMBLY
NOTE: All threads are right hand. Refer to gure 2 (page 3). Discon-
nect air supply and relieve all system pressure prior to servicing.
Carefully remove the parts, inspect for damage, nicks or excessive
wear and determine if any parts will need replacement.
Using a 7/8” wrench, unthread and remove (11) adapter, con-
taining (12 and 13) “O” rings, releasing (14) muer housing.
Using a 7/16” wrench, remove (28) nuts.
Remove four (1) bolts, (2) upper cap and (3) gasket.
Remove (10) cylinder, containing (4) sleeves and (7) spools.
Using (1) bolt, push (7) spools and (4) sleeves out “sleeve” end
of (10) cylinder.
Remove (16) retaining ring, (17) washer and (19) piston.
Remove (22) dowel pin, releasing (20) piston adapter.
Remove (3) gasket.
Clamp (31) extension tube horizontally in a vise. Unthread
and remove (27) base, (30) gasket, (26) spring and (25) washer.
NOTE: Remove (24) rod seal only if replacement is necessary.
Pull up on (33) piston rod to reveal (35) cotter pin.
Remove (35) cotter pin and (34) connecting pin, releasing (33)
piston rod.
Remove (54) internal circlip from (52) primer tube by using
circlip pliers and take out the (53) grease lter.
Using (33) piston rod, push down on (36) connector until it
bottoms.
Remove (51) retainer ring.
Push (50) primer up into (52) primer tube.
Lightly wedge a flat blade screwdriver between (50) primer
and (52) primer tube, so (50) primer unthreads with (52) prim-
er tube.
Insert a 5/16” diameter rod thru the cross holes in (52) primer
tube and use the rod to unthread and remove (52) primer
tube.
Remove (42) spacer, (47) gasket and (48) valve seat from (52)
primer tube.
Remove (43 - 46) foot valve assembly from (49) primer rod.
Remove (43) retaining ring, releasing (44) “U” cup. NOTE: Do
not remove (45) guide unless replacement is necessary.
Remove (41) guide washer.
Clamp (37) lower suction tube horizontally in a vise. Unthread
and remove (31) extension tube and (32) gasket.
Using a 7/32” diameter rod in the cross hole in (36) connector
and a 9/16” wrench on the ats of (38) plunger, unthread and
remove (36) connector from (38) plunger. NOTE: Do not dam-
age the o.d. of (38) plunger in any way.
Using a 5/32” diameter rod in the cross hole of (49) primer rod
and a 9/16” wrench on ats of (38) plunger, unthread and re-
move (49) primer rod, releasing (40) ball and (39) ball stop.
PUMP REASSEMBLY
NOTE: Thoroughly clean and lubricate all seals and bores with Shell
Gadus S2 U1000 upon assembly. Replace all soft parts with
new ones included in the repair kit. Note: Refer to the illustration
(gure 2, page 3) for“U” cup lip seal direction.
Assemble (39) ball stop and (40) ball into (38) plunger, secur-
ing with (49) primer rod. NOTE: Torque (49) primer rod to 70 -
100 in. lbs (7.9 - 11.3 Nm).
Thread (36) connector to (38) plunger, using a 7/32” diameter
rod thru the cross hole to tighten. NOTE: Tighten (36) connec-
tor to 17 - 25 ft lbs (23.1 - 33.9 Nm).
Assemble (45) guide and (44) “U” cup into (46) valve body,
securing with (43) retaining ring. NOTE: Assemble chamfered
corner of (45) guide into (46) valve body rst.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
1.
2.
3.
Assemble (41) guide washer and (43 - 46) foot valve assembly
onto (49) primer rod.
Assemble (42) spacer, (47) gasket and (48) valve seat onto (49)
primer rod.
Thread (50) primer onto (49) primer rod, securing with (51)
retainer ring.
Thread (52) primer tube to (37) lower suction tube and tight-
en. NOTE: Torque (52) primer tube to 65 - 75 ft lbs (88.1 - 101.7
Nm).
Assemble (33) piston rod to (36) connector, securing with (34)
connecting pin and (35) cotter pin.
Assemble (32) gasket and (31) extension tube to (37) lower
suction tube and tighten. NOTE: Torque (31) extension tube to
65 - 75 ft lbs (88.1 - 101.7 Nm).
Assemble (23) “O” ring, (24) rod seal, (25) washer, (26) spring
and (30) gasket into (27) base and assemble (27) base to (31)
extension tube. Clamp (27) base horizontally in a vise and
tighten (31) extension tube. NOTE: Torque (31) extension tube
to 65 - 75 ft lbs (88.1 - 101.7 Nm).
Push up on (50) primer, exposing (33) piston rod.
Assemble (3) gasket to (27) base.
Assemble (21) “O” ring to (20) piston adapter and assemble (20)
piston adapter to (33) piston rod, securing with (22) dowel pin.
Replace (18) “U” cups on (19) piston and assemble (19) piston
onto (20) piston adapter, securing with (17) washer and (16)
retaining ring.
Replace (5) “O” rings on (4) sleeves and assemble (4) sleeves
into (10) cylinder. NOTE: Assemble each sleeve into the end of
the cylinder nearest the exhaust hole.
Replace (6 and 9) “O” rings and (8) “U” cups on (7) spools and
assemble (7) spools into (10) cylinder from the opposite end
as the (4) sleeve went in.
Assemble (10) cylinder onto the pump, being careful when
sliding over the lips of (18) “U” cups. NOTE: Be sure (3) gasket is
seated properly.
Replace (3) gasket on (2) upper cap and assemble (2) upper
cap to (10) cylinder.
Assemble (1) bolts to pump, securing with (28) nuts. NOTE:
Torque (28) nuts to 80 - 90 in. lbs (9.0 - 10.2 Nm).
Replace (12 and 13) “O” rings on (11) adapter.
Assemble (15) foam liners to (14) muer housing.
Assemble (14) muer housing to (10) cylinder, securing with
(11) adapter. NOTE: Torque (11) adapter to 70 - 80 in. lbs (7.9 -
9.0 Nm).
Assemble (53) grease lter to (52) primer tube, keeping open
and inside the (52) primer tube and place the (54) internal cir-
clip inside the groove of (52) primer tube.
TROUBLE SHOOTING
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.
Pump will not cycle or will not deliver material.
Be certain to check for non-pump problems, including kinked,
restrictive or plugged inlet / outlet hose or dispensing device.
Depressurize the pump system and clean out any obstructions
in the inlet / outlet material lines.
Check all seals, including track gaskets.
Check direction of “U” cup lips.
Remove (54) circlip. Take out (53) grease filter and clean. Re-
install (53) grease filter inside (52) primer tube and retain by
installing (54) circlip.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
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