OPERATOR’S MANUAL
66266-XXX-B
1-8-99
RELEASED:
REVISED:
(REV. 04)
INCLUDING: SERVICE KITS, TROUBLESHOOTING, PARTS LIST,
DISASSEMBLY & REASSEMBLY.
10-18-10
CHOP-CHECK STYLE
LOWER PUMP ENDS
Also covers 637074-X43-B 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.
SERVICE KITS
LOWER PUMP END DESCRIPTION CHART
Use only genuine ARO® replacement parts to assure com-
patible pressure rating and longest service life.
637074-X43-B for general repair of 66266-XXX-B lower
pump ends.
66266 - X 4 3 - B
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Packing Material
3 - Glass filled PTFE (upper and lower)
C - UHMW-PE (upper and lower)
G - UHMW-PE / Leather staggered (upper and lower)
P - UHMW-PE / Glass filled PTFE staggered (upper)
- UHMW-PE (lower)
GENERAL DESCRIPTION
R - Glass filled PTFE / UHMW-PE staggered (upper)
- Glass filled PTFE (lower)
WARNING DO NOT EXCEED MAXIMUM OPERATING
PRESSURE AS INDICATED ON PUMP MODEL PLATE.
WARNING REFER TO GENERAL INFORMATION SHEET
FOR ADDITIONAL SAFETY PRECAUTIONS AND IMPOR-
TANT INFORMATION.
Spring Arrangement
4 - Multiple wave spring
This manual only covers the lower pump section. It is one
of four documents which support an ARO pump. Replace-
ment copies of these forms are available upon request.
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Plunger Type
3 - Hardened stainless steel with hard chrome plating
Service Kit Selection
66266 - X 4 3 - B
637074 - X 4 3 - B
Packing
650XXX-X Pump Model Operator’s Manual.
General Information for Air Operated or Hydraulically
Operated Pumps.
Lower Pump End Operator’s Manual.
Air or Hydraulic Motor Operator’s Manual.
ꢁ
ꢁ
Example: Lower Pump End # 66266-C43-B
Service Kit # 637074-C43-B
Plunger
:
ꢁ
TROUBLE SHOOTING
The chop-check design provides for easy priming of the
lower foot 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.
No material at outlet (pump continually cycles).
Check material supply. Disconnect or shut off the air sup-
ply and replenish the material, reconnect.
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MAINTENANCE
Material on one stroke only (fast downstroke).
The (21) check may not be seating in the (22) seat (see
lower pump disassembly). Remove the check from the
seat, clean and inspect the check and seat area. If the
check or seat is damaged, replace.
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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 material from drying on the piston rod, which would
drag thru the packings, ruin them and eventually scour the
piston rod.
Provide a clean work surface to protect sensitive internal
moving parts from contamination from dirt and foreign mat-
ter during disassembly and reassembly.
Before reassembling, lubricate parts as required. When as-
sembling “O” rings, or parts adjacent to “O” rings, exercise
care to prevent damage to “O” rings and “O” ring groove sur-
face.
Material on one stroke only (fast upstroke).
The (34) valve rod may not be seating in the (28) seat (see
lower pump disassembly). Remove the valve rod from the
seat, clean and inspect the valve rod and seat area. If the
valve rod or seat is damaged, replace. Check for worn or
damaged packings. Replace the packings as necessary.
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Material leakage out of the solvent cup or material ap-
pears on the pump plunger rod.
Relieve the pressure in the pump and tighten the solvent
cup until leakage discontinues. If this procedure does not
aid in stopping the leakage problem, the upper packings
may be worn (see lower pump disassembly). Replace the
packings as necessary.
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INGERSOLL RAND COMPANY LTD
209 NORTH MAIN STREET – BRYAN, OHIO 43506
(800) 495-0276 FAX (800) 892-6276
CCN 99768657
© 2010
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ꢀ
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PARTS LIST / 66266-XXX-B
UPPER PACKING
51
51
52
52
ꢁ 1
51
53
43
115
1 - 11-1/2 N.P.T.F. - 1
6
7
26
9
10
MIDDLE PACKING
28
11
7
ꢀ
47
57
36
24
25
21
23
22
15
30
55
55
56
34
ꢀ
37
65
23
56
54
LUBRICATION / SEALANTS
c
d
Keep solvent cup filled with a lubricant such as
ꢂ
Wet Sol "Plus" or equivalent.
Apply Loctite® 242® to threads when assembling.
31
32
33
Figure 1
66266-XXX-B (en)
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(34) valve rod (beveled end first).
8. Thread the (34) valve rod to the (26) plunger rod and
tighten, using the wrench flats provided.
9. Assemble one (23) “O”ring, the (22) seat (large o.d. cham-
fer facing down) and the other (23) “O” ring into the (15)
pressure chamber body.
10. Assemble the (26) plunger rod and components into the
(15) pressure chamber body with the (30) primer rod go-
ing in first. Slide the (25) check stop into place in the (25)
pressure chamber body.
11. Place the (7) gasket in the (25) check stop.
12. Lubricate the middle packing assembly and the inside of
the (9) suction tube and carefully slide the suction tube
over the (26) plunger rod and middle packing assembly
and into the (25) check stop.
13. Install the three (10) tie rods.
14. Place the (7) gasket on the end of the (9) suction tube.
NOTE: Apply a small amount of grease on the gasket to
help keep it in place.
15. Assemble the (6) pump body over the (26) plunger rod
and onto the (10) tie rods. Seat the (9) suction tube into
the (6) pump body.
16. Assemble the (43) wave spring, (53) male packing
washer, (51 and 52) “V” packings and (115) backup onto
the (26) plunger rod and into the (6) pump body (refer to
page 3).
17. Install the (1) solvent cup assembly and hand tighten.
18. Push the (26) plunger rod down to expose the (30)
primer rod at the bottom of the pump. Assemble the (31)
primer plate and the (32) primer button (beveled edge
away from the pump) onto the (30) primer rod, securing
with the (33) lock nut.
19. Push up on the (30) primer rod until the primer rod is
inside the (15) pressure chamber body, then tighten the
(1) solvent cup assembly.
PN 97999-829
Page 4 of 4
66266-XXX-B (en)
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