66266--X
OPERATOR’S MANUAL
INCLUDING: SERVICE KITS, TROUBLESHOOTING, PARTS LIST, DISASSEMBLY & REASSEMBLY
RELEASED: 7--7--90
REVISED: 6--4--10
(REV. G) IPP
LOWER PUMP END
CHOP--CHECK STYLE
ALSO COVERS 637074-XXX SERVICE KIT
IMPORTANT: READ THIS MANUAL CAREFULLY BEFORE INSTALLING,
OPERATING OR SERVICING THIS EQUIPMENT.
LOWER PUMP END OPTION
DESCRIPTION CHART*
66266--XXX
(PACKINGS ARE UPPER AND LOWER UNLESS NOTED)
PLUNGER TYPE
SPRING ARRANGEMENT
PACKING MATERIAL
1 THIOKOL LEATHER -
PACKING MATERIAL
G UHMW--PE/LEATHER STAG’D
3 GLASS FILLED PTFE
P UHMW--PE/PTFE STAG’D (UPPER)
5 PTFE(GF)/LEATHER STAG’D (UPPER)
GLASS FILLED PTFE (LOWER) -
UHMW--PE (LOWER)
SPRING ARRANGEMENT
1 COIL SPRING -
4 WAVE SPRING
5 COMPOSITE SPRING W/ADJ P’KG NUT -
R PTFE/UHMW--PE STAG’D (UPPER)
PTFE (LOWER)
PLUNGER TYPE
3 HD SS W/HD CHROME PLATING
C UHMW--PE
D UHMW--PE/LEATHER STAG’D (UPPER)
LEATHER (LOWER) -
-
AS OF MAY 15, 1995 NO LONGER AVAILABLE
* NOT ALL MODEL COMBINATIONS ARE AVAILABLE, REFER TO PUMP MODEL MANUAL (650XXX--XXX) FOR ‘‘ACTIVE” MODELS.
• The pump ratio is an expression of the relationship between the air
motor area and the lower pump end area.
SERVICE KITS
REGULATED INLET AIR PRESSURE X PUMP RATI0 =
• Use only genuine ARO replacement parts to assure compatible-
pressure rating and longest service life.
• 637074--XXX for general repair of 66266--XXX Lower Pump End
MAXIMUM FLUID OUTLET PRESSURE PRESSURE
EXAMPLE: When150PSI (10.3Bar) air pressure issupplied tothe
pump motor on a 3:1 ratio pump, the lower pump end will develop a
maximum of 450 PSI (31 Bar) fluid pressure (at no flow).
Asthefluidcontrolisopened,theflowratewillincreaseasthemotor
cycle rate increases to keep up with the demand.
GENERAL DESCRIPTION
• Operating at excessive pressures will shorten the life of the pump.
TROUBLE SHOOTING CHOP-CHECK PUMPS
Common Lower Pump End Problems
• No material at outlet. (Pump continually cycles.)
Check material supply, disconnect or shut off the air supply and re-
plenish the material, reconnect.
• 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
andinspectthevalveseatarea. Ifcheckorfootvalvearedamaged,
replace.
WARNING DONOTEXCEEDMAXIMUMOPERATINGPRES-
SURE AS INDICATED ON PUMP MODEL PLATE
WARNING REFER TO GENERAL INFORMATION SHEET
FOR ADDITIONAL SAFETY PRECAUTlONS AND IMPORTANT
INFORMATION. (Seethepumpmodelmanual for the proper Form
No.)
• ThisLOWERPUMPENDMANUALisoneoffourdocumentsneed-
ed to properly support an ARO pump model.
Part A. 650XXX--XXX--X MODEL (OPERATOR’S) MANUAL,
Part B. GENERAL INFORMATION,
Part C. MOTOR (OPERATOR’S) MANUAL,
Part D. LOWER PUMP END (OPERATOR’S) MANUAL.
Copies are available from the factory upon request.
• Material on one stroke only. (fast upstroke.)
Check for worn or damaged seals. Replace the seals asnecessary.
• Material leakage out of the solvent cup or material appears on
the pump plunger rod.
• TheChop--Checkdesignprovidesfareasyprimingofthelowerfoot
valve. The double acting feature is standard in all ARO industrial
pumps, material is delivered to the pump discharge outlet on both
the up and down stroke.
ForModels(--X5XOnly).Increasetheloadonthepackingsbytight-
ening the packing nut.
Check for worn upper packings and replace them as necessary.
INGERSOLL RAND COMPANY LTD
209 NORTH MAIN STREET – BRYAN, OHIO 43506
(800) 495-0276 FAX(800) 892-6276
© 2010
LOWER PUMP END
--X5X MODELS
--X1X MODELS
COIL SPRING
UPPER
-- K 3 X M O D E L S
COMPOSITE SPRING
WAVE
SPRING
50
51
50
--X4X MODELS
51
52
52
75
53
41
115
51
42
26
52
53
1
n
43
AFTER MAY 15, 1995
THE MODELS IN SHADED
AREAS ARE NO LONGER
AVAILABLE
10
MIDDLE
6
‘‘V” PACKING
(MODELS --GXX & --9XX
have staggered pkgs)
-- K 3 X M O D E L S
7
9
47
57
56
76
36
55
54
34
11
28
24
25
15
LOWER
CUP PACKING
‘‘V” PACKING
-- K 3 X
(Models --1XX,
--AXX, --DXX)
37
65
MODELS
22
23
37
35
37
35
61
59
77
21
30
21
58
21
31
32
33
Primer
Assembly
STAGGERED PACKINGS
NOTE: When using ‘‘STAGGERED”
packings use the shaded position as shown in the
views above for the ‘‘52” and ‘‘56” packings.
n A 93456--1 Rod is included with unit
66266-X
to adjust packing nut/solvent cup.
66266-X
PAGE 3 OF 4
PACKING OPTIONS AND SERVICE KITS
UPPER PACKING
MIDDLE PACKING
55 (X) ‘‘V” PKG
LOWER PACKING
59 (4) ‘‘V” PKG 65 (1)‘‘U” CUP
LOWER PUMP
SVCE. KIT
51 (X) ‘‘V” PACKING
52 (2) ‘‘V PKG
PART NO
93661-1
93661-2
93661-2
93661-4
93661-4
(QTY) [MT’L] PART NO
[MT’L] PART NO
(QTY) [MT’L] PART NO [MT’L] PART NO
[MT’L]
637074-XXX
637074-G43
637074-343
637074-G43
637074-C43
637074-D43
66266-XXX
-113, - -153 -
-313, - -353 -
-513, - -553 -
-C13, - -C53 -
-D13, - -D53 -
(5)
(5)
(3)
(5)
(3)
[L]
[T]
[T]
- - - - - - -
- - - - - - -
93661-1
- -
- -
93662-1
93662-2
93662-2
93662-2
93662-1
(4)
(4)
(4)
(4)
(4)
[L]
[T]
[T]
[T]
[L]
93678-1
- - - - - - -
- - - - - - -
- - - - - - -
93678-1
[L]
- -
- - - - - - -
90911
- -
[T]
[T]
[T]
- -
[L]
- -
- -
90911
[UH] - - - - - - -
[UH] 93661-1
- -
90911
[L]
[L]
- - - - - - -
- After May 15, 1995 these models are no longer available.
EXAMPLE: 66266-113 is replaced by 66266-G43 & Service kit is 637074-G43.
LOWER PUMP DISASSEMBLY
Note: All threads are right hand.
10. Remove (24) ‘‘O” Ring from (14) adapter.
11. With retaining ringpliers, remove (37) retaining ring from (21) valve
body, then remove the packings out of (21) valve body.
12. Using provided wrench flats, remove (30) rod from (34) valve rod.
Again, using wrench flats remove (34) valve rod from (26) plunger
rod.
1. Remove (6) pump body from (9) suction tube, by sliding it off three
(10) tie rods.
2. Remove (7) gasket from top of (9) suction tube.
3. Remove three (10) tie rods.
4. Pull (9) suction tube off the MIDDLE packing and valve section and
out of (25) adapter.
CAUTION: DO NOT mar or damage surfaces of any of these rods.
5. Push (26) plunger rod to expose the primer assembly
6. Remove(33) nut, (32) valveplateand(31) washerfrom (30)primer
rod.
13. Slide the MIDDLE packing assembly off (34) valve rod.
14. Clamp(34)valveseatinaviseandremove(36)valveseatnut,then
remove the MIDDLE packing assembly off (28) valve seat.
15. Remove (1) solvent cup from (6) pump body. Now remove UPPER
packing assembly out (6) pump body.
7. Pull (26) plunger rod and remove MIDDLE packing, valve section
and (30) rod from (15) chamber body.
8. Remove (7) gasket out of (25) adapter.
9. With the aid of a flat bladed screwdriver remove (25) adapter, (21)
valve body, (22) valve seat and two (23) gaskets out of (15) cham-
ber body. Use the flat bladed screwdriver to pry on the slot on (25)
adapter.
LOWER PUMP REASSEMBLY
Note: All rubber goods and packings should be lubricated with a com-
patible lubricant prior to assembly.
13. Place (7) gasket in (25) adapter.
14. Lubricate the MIDDLE packing assy and the inside of (9) suction
tube. Carefullyslide(9)suctiontubeover(26)plungerandMIDDLE
packing assy into (15) adapter.
1. Assemble(21)valvebodywithLOWER packings. Refer toPacking
Options Chart on page 2.
15. Install three (10) tie rods.
2. Retain LOWER packing assy. in (21) valve body with (37) retaining
ring.
16. Place (7) gasket on end of (9) suction tube. NOTE: Apply a small
amount of grease on gasket to help keep gasket in place.
17. Slide (6) pump body over (26) plunger rod onto (10) tie rods. Seat
the (9) suction tube into (6) pump body.
3. Assemble (28) valve seat MIDDLE packings. Refer to Packing Op-
tions Chart on page 2.
4. Secure the MIDDLE packing assy. with (36) valve seat nut.
5. Slide(21)valvebodywithLOWERpackingsontotheendof(30)rod
opposite the wrench flats. Install (21) valve body with the beveled
end onto rod
18. Assemble the UPPER packing onto the (26) plunger rod and slide
into (6) pump body.
19. Install (1) solvent cup and hand tighten.
20. Push (26) plunger rod to expose (30) rod at bottom of pump. Place
(31) washer, (32) plate with beveled edges away from pump and
(33) nut onto (30) rod. Tighten (33) nut.
21. Push (30) rod until rod is inside (15) chamber body. Tighten (1) sol-
vent cup
6. Screw (30) rod into (34) valve body and tighten.
7. Place (24) ‘‘O” Ring on (25) adapter.
8. Slide (25) adapter onto the (34) valve body & (30) rod assy with the
wider diameter opening going on first & fit it over (21) body.
9. Slide (28) valve seat and MIDDLE packing assy over (34) valve
body. Be sure to place beveled end of (28) valve seat against bevel
of (34) valve body.
10. Screw (34) valve body into (26) plunger rod and tighten. Use
wrench flats.
11. Place one (23) gasket inside (15) chamber body, followed with (22)
valve seat with beveled side up. NOTE: If stringy or filled materi
alisbeingpumped,thenreversethe(22)valveseat.Nextplace
second (23) brass gasket against top of (22) valve seat.
12. Place(26)plunger,(28)valveseatandMIDDLEpackingassyalong
with (30) rod & (25) adapter assy into (15) chamber body with the
primer rod end going in first.Slide the (25) adapter into place in the
(15) chamber body.
.
PN 97999-057
66266-X
PAGE 4 OF 4
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