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OPERATOR’S MANUAL 6694X-XXX
INCLUDING: SERVICE KITS, TROUBLESHOOTING, PARTS LIST & DISASSEMBLY & REASSEMBLY.
RELEASED: 11-27-90
REVISED: 6-2-10
(REV. R)
TWO-BALL STYLE LOWER PUMP ENDS
66941-XXX (400 Series Stainless Steel)
66942-XXX (300 Series Stainless Steel)
Also covers 637211-XX3 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.
CCN 99711764
SERVICE KITS
Use only genuine ARO® replacement parts to assure com-
patible pressure rating and longest service life.
637211-XX3 for general repair of 6694X-XXX lower pump
ends.
GENERAL DESCRIPTION
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.
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.
650XXX-X Pump Model Operator’s Manual
General Information - Air / Hydraulically Operated Piston
Pumps
:
Lower Pump End Operator’s Manual
Air / Hydraulic Motor Operator’s Manual
The two-ball design provides better 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.
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,
ush the entire pump system with a solvent that is compat-
ible with the material being pumped.
Keep the solvent cup lled with this compatible solvent. This
will keep the material from drying on the piston rod, which
could drag through 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 reassembly, lubricate parts as required. When assem-
bling “O” rings or parts adjacent to “O” rings, exercise care to
prevent damage to “O” rings and “O” ring groove surface.
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LOWER PUMP END DESCRIPTION CHART
6694X - X X X
Pump Material
1 - 400 series stainless steel
2 - 300 series stainless steel
Service Kit Selection
EXAMPLE: Lower Pump End # 66941-CDF
Service Kit # 637211-C63
6694X - X X X
Packing Spring
637211 - X X 3
Packing Material
C - UHMW-PE (upper and lower)
K - Carbon Graphite lled PTFE with Nitrile Energizer
(upper and lower)
L - Mineral lled PTFE (upper and lower)
P - UHMW-PE / Mineral lled PTFE staggered (upper)
UHMW-PE (lower)
R - Mineral lled PTFE / UHMW-PE staggered (upper)
Mineral lled PTFE (lower)
Plunger Type
3 - Hardened stainless steel with hard chrome plating (threaded)
6 - Stainless steel with hard chrome plating (threaded)
D - Hardened stainless steel with hard chrome plating (large motors)
F - Stainless steel with hard chrome plating (large motors)
Spring Arrangement (Service kit spring designation)
3 - No spring (3)
6 - Wave spring (6)
C - No spring with alternate seat material (3)
D - Wave spring with alternate seat material (6)
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ARO® is a registered trademark of Ingersoll-Rand
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Loctite® and 242® are registered trademarks of Henkel Loctite Corporation
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Primer T™ is a trademark of Henkel Loctite Corporation
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INGERSOLL RAND COMPANY LTD
209 NORTH MAIN STREET – BRYAN, OHIO 43506
(800) 495-0276 FAX(800) 892-6276
© 2010
www.ingersollrandproducts.com