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OPERATOR’S MANUAL
66266--X
RELEASED: 7--7--90
REVISED: 6--4--10
(REV. G) IPP
INCLUDING: SERVICE KITS, TROUBLESHOOTING, PARTS LIST, DISASSEMBLY & REASSEMBLY
IMPORTANT: READ THIS MANUAL CAREFULLY BEFORE INSTALLING,
OPERATING OR SERVICING THIS EQUIPMENT.
LOWER PUMP END
CHOP--CHECK STYLE
ALSO COVERS 637074-XXX SERVICE KIT
(PACKINGSARE UPPERANDLOWERUNLESSNOTED)
LOWER PUMP END OPTION
DESCRIPTION CHART*
66266--XXX
PACKING MATERIAL
1 THIOKOL LEATHER -
3 GLASS FILLED PTFE
PACKING MATERIAL
5 PTFE(GF)/LEATHER STAG’D (UPPER)
GLASS FILLED PTFE (LOWER)
-
PLUNGER TYPE
SPRING ARRANGEMENT
SPRING ARRANGEMENT
PLUNGER TYPE
1COILSPRING-
4 WAVE SPRING
5 COMPOSITE SPRING W/ADJ P’KGNUT -
3 HD SS W/HD CHROMEPLATING
*NOTALL MODELCOMBINATIONSAREAVAILABLE,REFERTOPUMPMODEL MANUAL(650XXX--XXX)FOR‘‘ACTIVE”MODELS.
C UHMW-- PE
D
UHMW--PE/LEATHERSTAG’D(UPPER)
LEATHER (LOWER)
-
G UHMW--PE/LEATHER STAG’D
P UHMW--PE/PTFE STAG’D(UPPER)
UHMW--PE (LOWER)
R PTFE/UHMW--PE STAG’D(UPPER)
PTFE (LOWER)
- AS OF MAY 15, 1995 NO LONGER AVAILABLE
SERVICE KITS
• 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
GENERAL DESCRIPTION
WARNING
DONOT EXCEEDMAXIMUM OPERATINGPRES-
SURE AS INDICATED ON PUMP MODEL PLATE
WARNING
REFER TO GENERAL INFORMATION SHEET
FOR ADDITIONAL SAFETY PRECAUTlONS AND IMPORTANT
INFORMATION.(See thepump model manual for theproper Form
No.)
• ThisLOWERPUMPEND MANUALisoneof fourdocumentsneed-
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.
• TheChop--Check designprovides fareasypriming ofthe lowerfoot
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.
• The pump ratio isan expressionof therelationship betweenthe air
motor area and the lower pump end area.
REGULATED INLET AIR PRESSURE X PUMP RATI0 =
MAXIMUM FLUID OUTLET PRESSURE PRESSURE
EXAMPLE: When150 PSI (10.3 Bar)air pressure is supplied to the
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.
• 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
andinspect the valveseat area.If checkor footvalve aredamaged,
replace.
• Material on one stroke only. (fast upstroke.)
Check for worn or damaged seals.Replace the seals as necessary.
• Material leakage out ofthe solvent cup ormaterial appears on
the pump plunger rod.
ForModels(--X5XOnly). Increasetheloadonthepackings bytight-
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
www.ingersollrandproducts.com