OPERATOR’S MANUAL
1875CXXXXXX
9-15-10
RELEASED:
(REV. 01)
INCLUDING: SERVICE KITS, TROUBLESHOOTING, PARTS LIST,
DISASSEMBLY & REASSEMBLY.
1875CXXXXXX
LOWER PUMP END
Also covers K1875CXXXXXX service kits
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.
GENERAL DESCRIPTION
WARNING DO NOT EXCEED MAXIMUM OPERATING PRES-
SURE AS INDICATED ON PUMP MODEL PLATE.
WARNING REFER TO GENERAL INFORMATION SHEET FOR
ADDITIONAL SAFETY PRECAUTIONS AND IMPORTANT IN-
FORMATION.
This manual covers the lower pump section. It is one of four
documents which support an ARO pump. Replacement copies
of these forms are available upon request.
ꢁ
Pump Model Operator’s Manual.
General Information for Air / Hydraulically Operated Piston
Pumps.
Lower Pump End Operator’s Manual.
Air / Hydraulic Motor Operator’s Manual.
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ꢃ
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MAINTENANCE
The air / hydraulic motor is completely separate from the lower
pump end. This helps to keep the motor from being contaminated
by the material being pumped. Periodically, flush entire pump
system with a solvent that is compatible with the material being
pumped.
Keep solvent cup filled with this compatible solvent. This will
keep the material from drying on the plunger, which would drag
through the packings, ruin them and eventually scour the plunger.
Provide a clean work surface to protect sensitive internal moving
parts from contamination from dirt and foreign matter during dis-
assembly and reassembly.
Before reassembling, lubricate parts as required. When assembling
“O” rings, or parts adjacent to “O” rings, exercise care to prevent
damage to “O”rings and “O”ring groove surface.
Figure 1
INGERSOLL RAND COMPANY LTD
209 NORTH MAIN STREET – BRYAN, OHIO 43506
© 2010
CCN 46730388
(800) 495-0276 FAX (800) 892-6276
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PARTS LIST
(size)
(size)
Item Description
Qty Part No.
(1) 90615
(1) 90615-2
(1) 90606
(1) 90614
(1) 76048
(1) Y325-32
(1) 93273
(1) 77432
(1) 77327
(4) 90578-3
(4) 90578-4
(4) 90578-5
(3) 92482
(1) 91349
(1) 90602
(1) 76748
(1) 65793-2
(1) 76045
(1) 93943
(1) 92874
Mtl
[SS]
[CSS]
[SS]
[SS]
[SS]
[B]
Item Description
Qty Part No.
(1) 90601
(1) 77265
(2) 73919
(2) 92867-1
(1) 90610
(1) 90948
(1) 90600
(1) 90607
(1) 76248
(1) 90569
(1) 90621
(1) 90621-2
(1) 90616
(1) 90617
(1) 90949
(1) 90620
(1) 90619
Mtl
[SS]
[T]
(1875CP721, CP725, CP7E1)
1
Plunger
14 Cup Follower
(1875CP791, CP7E1, CP7F1, CP7F5)
(1875CP28, CP29)
(1875CP5S)
Cup
15
ꢄ
2
3
Lock Nut
Spacer Tube
[T]
(1875CP21, CP29)
(1875CP28)
(1875CP5F)
[UH]
[SS]
[SS]
[SS]
[T]
16 Flat Washer
(1/16” x 2” o.d.)
(1.0000” diameter)
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4
5
6
7
8
“O” Ring
Solvent Cup
Washer
17 Ball
[SS]
[SS]
[D]
18 Inner Check Seat
(0.070” x 2.129” o.d)
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19 “O” Ring Seal
20 Lock Nut
Female Packing Washer
[SS]
[SS]
[SS]
[CSS]
[SS]
[T]
(1875CP4E, CP45, AP4U)
(1875CP7F5, CP725)
(1875CP7F1, CP721)
(1875CP7E1, CP791)
“V” Packing
[T]
21 Suction Tube
(1875CP4F, AP4U
)
[UH]
[V]
(1875CP4V)
(1875CP4E)
[T]
22 Snap Ring
(0.070” x 1.879” o.d.)
9
Male Packing Washer
[D]
23 “O” Ring
(1.1875” diameter)
10 Spring
[SS]
[Ny]
[SS]
[SS]
[SS]
[SS]
24 Ball
[SS]
[SS]
[SS]
(1/4” o.d. x 1.828”)
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11 Gasket
25 Dowel Pin
12 Pump Body
13 Connector Rod
26 Foot Valve Seat
(1875CP28, CP29)
(1875CP25)
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Items included in Service Kit
(1) K1875CXXXXXX
(1875CP21)
3. Assemble (11) gasket and (3) spacer tube and components into
(12) pump body. NOTE: Do not tighten at this time.
4. Slide (1) plunger into (3) spacer tube and (12) pump body, be-
ing careful not to damage (8) “V”packings.
5. Assemble (13) connector rod and (14) cup follower to (1) plung-
er. NOTE: Apply Loctite nickel anti-seize to threads of connector
rod and tighten to 50 ft lbs (67.8 Nm).
MATERIAL CODE
[B] = Nitrile
[SS]
[T]
[Ny]
[V]
=
=
=
=
Stainless Steel
PTFE
Nylon
[CSS] = Ceramic coated Stainless Steel
[D] = Acetal
[UH] = UHMW-PE
Viton
LOWER PUMP DISASSEMBLY
6. Assemble (15) cup, (16) flat washer, (15) cup and (17) ball to
(14) cup follower, securing with (18) inner check seat. NOTE:
Apply Loctite nickel anti-seize to threads and tighten to 65 - 70
ft lbs (88.1 - 94.8 Nm).
7. Assemble (19) “O”ring seal onto (21) suction tube.
8. Apply Loctite nickel anti-seize to threads of (21) suction tube
and assemble to (12) pump body, being careful not to damage
(15) cups. NOTE: Tighten to 125 - 150 ft lbs (169.5 - 203.4 Nm).
NOTE: (15) cups can be rolled on a clean flat surface or ARO tool
#637403 is available for easier insertion into (21) suction tube.
9. Tighten (3) spacer tube to 125 - 150 ft lbs (169.5 - 203.4 Nm).
10. Assemble (24) ball, (23) “O” ring seal, (22) snap ring and (25)
dowel pin to (26) foot valve body.
NOTE: All threads are right hand.
1. Secure the lower pump assembly in a vise, clamping on flats of
(12) pump body.
2. Securely hold (21) suction tube with a strap wrench and un-
thread and remove (26) foot valve body.
3. Remove (25) dowel pin, (24) ball, (22) snap ring and (23) “O”
ring.
4. Using a strap wrench, unthread and remove (21) suction tube
and (19) “O”ring seal from (12) pump body.
5. Loosen (3) spacer tube and push (1) plunger and components
out thru the bottom end of (12) pump body. NOTE: Be careful
not to damage the finish on (1) plunger.
6. Unthread and remove (18) inner check seat, releasing (17) ball,
(16) flat washer and two (15) cups.
7. Unthread and remove (3) spacer tube and (5) solvent cup from
(12) pump body, releasing (11) gasket, (10) spring, (9) male
packing washer, (8) “V” packings, (7) female packing washer
and (6) washer.
11. Apply Loctite nickel anti-seize to threads of (26) foot valve
body and assemble body and components to (21) suction tube.
NOTE: Tighten to 125 - 150 ft lbs (169.5 - 203.4 Nm).
TROUBLE SHOOTING
8. Unthread and remove (5) solvent cup from (3) spacer tube and
remove (4) “O”ring.
9. Unthread and remove (13) connector rod from (1) plunger.
10. Unthread and remove (14) cup follower from (13) connector
rod.
Material leakage out of solvent cup.
Worn packings. Replace (8) packings.
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Material in one stroke only (fast upstroke).
(17) ball may not be seating on (18) inner check seat. Remove
ball from assembly, clean and inspect the ball seat area. If ei-
ther the ball or the inner check seat is damaged, replace.
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LOWER PUMP REASSEMBLY
NOTE: Thoroughly clean and lubricate all seals. Replace all soft
parts with new ones included in the repair kit. Note: Refer to
the illustration (figure 2, page 2) for “V”packing lip direction..
1. Assemble (4) “O” ring to groove in (3) spacer tube and assemble
(5) solvent cup to (3) spacer tube.
2. Assemble (6) washer, (7) female packing washer, (8) “V” pack-
ings, (9) male packing washer and (10) spring into (3) spacer
tube.
Material in one stroke only (fast downstroke).
(24) ball may not be seating on (26) foot valve body. Remove
ball from foot valve, clean and inspect the ball and seat area. If
either the ball or the foot valve body is damaged, replace. Also,
restriction on the suction inlet will cause fast downstroke (col-
lapsed hose).
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Page 3 of 4
1875CXXXXXX (en)
PARTS LIST
1
3
2
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4
5
6
8
7
9
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10
11
13
12
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ꢆ
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14
15
15
16
17
18
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ꢅ
19
20
Figure 3
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21
ASSEMBLY TORQUE REQUIREMENTS
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NOTE: DO NOT OVERTIGHTEN FASTENERS.
(3) spacer tube, (21) suction tube and (26) foot valve body
125 - 150 ft lbs (165.5 - 203.4 Nm).
(13) connector rod and (14) cup follower 50 ft lbs (67.8 Nm).
(18) inner check seat 65 - 70 ft lbs (88.1 - 94.9 Nm)
22
23
24
26
LUBRICATION / SEALANTS
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Apply Loctite nickel anti-seize to threads.
25
Lubricate packings with WetSol upon assembly.
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Figure 2
PN 97999-1583
1875CXXXXXX (en)
Page 4 of 4
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