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
(PACKINGS ARE UPPER AND LOWER UNLESS NOTED)
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
1 COIL SPRING
-
4 WAVE SPRING
5 COMPOSITE SPRING W/ADJ P’KG NUT
-
3 HD SS W/HD CHROME PLATING
* NOT ALL MODEL COMBINATIONS ARE AVAILABLE, REFER TO PUMP MODEL MANUAL (650XXX--XXX) FOR ‘‘ACTIVE” MODELS.
C UHMW--PE
D
UHMW--PE/LEATHER STAG’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
DO NOT EXCEED MAXIMUM OPERATING PRES-
SURE AS INDICATED ON PUMP MODEL PLATE
WARNING
REFER TO GENERAL INFORMATION SHEET
FOR ADDITIONAL SAFETY PRECAUTlONS AND IMPORTANT
INFORMATION.
(See the pump model manual for the proper Form
No.)
•
This LOWER PUMP END MANUAL is one of four documents need-
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.
•
The Chop--Check design provides far 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.
•
The pump ratio is an expression of the relationship between the air
motor area and the lower pump end area.
REGULATED INLET AIR PRESSURE X PUMP RATI0 =
MAXIMUM FLUID OUTLET PRESSURE PRESSURE
EXAMPLE: When 150 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).
Asthe fluid controlisopened, the flow rate willincreaseasthemotor
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
and inspect the valve seat area. If check or foot valve are damaged,
replace.
•
Material on one stroke only. (fast upstroke.)
Check for worn or damaged seals. Replace the seals as necessary.
•
Material leakage out of the solvent cup or material appears on
the pump plunger rod.
For Models (--X5X Only). Increase the load on the packings 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
