Page 2of 2 650484-X

PUMP OPTION DESCRIPTION CHART

650484-X
PACKINGMATERIAL
PLUNGERTYPE
SPRINGARRANGEMENT
(PACKINGSAREUPPER AND LOWER UNLESS NOTED)
PACKINGMATERIAL
SPRINGARRANGEMENT
4 MultipleWave Spring w/
316Stainless Steel Balls
7 MultipleWave Spring w/
440Stainless Steel Balls
PLUNGERTYPE
3 HardenedStainless Steel w/
HardChrome Plating
B HardenedStainless Steel w/
CeramicCoating
3 Glassfilled PTFE P UHMW-PE/ PTFE staggered (upper)
C UHMW-PE UHMW-PE(lower)
G UHMW-PE/Leather staggered R PTFE/UHMW-PE staggered (upper)
PTFE(lower)
XX

GENERAL DESCRIPTION

WARNING HAZARDOUSPRESSURE. Do not exceed maxi-
mum operating pressure of 3300 p.s.i. (228 bar) at 150 p.s.i.
(10.3bar) inlet air pressure.
PUMPRATIO X
INLETPRESSURE TO PUMP MOTOR =MAXIMUMPUMP
FLUIDPRESSURE
Pumpratio is an expression of the relationship between the pump motor area and
thelower pump end area. EXAMPLE: When 150 p.s.i. (10.3 bar) inlet pressure is
suppliedto the motor ofa 6:1 ratio pump it will develop a maximum of750 p.s.i. (52
bar)fluid pressure (at no flow) - as the fluid control is opened, the flow rate will in-
creaseas the motor cycle rate increases to keep up with the demand.
WARNING Referto general information sheet for additional
safetyprecautions and important information.
xTheTwo-Ball pumps are primarily designed for the pumping of me-
diumviscosity fluids, Stainless Steel construction offers compatibili-
tywith a w ide range of fluids.The two -balldesign provides better
primingof the lower foot valve. The double acting feature is standard
inall ARO industrial pumps, material is delivered to the pump dis-
chargeoutlet on both the up and down stroke.
xThemotor is connected to the lower pump end by a spacer section.
Thisallows for lubrication of the upper packing gland and prevents
motorcontamination because of normal wear and eventual leakage
throughthe material packing gland. Be sure the solvent cup is ade-
quatelyfilled with lubricant to protect the upper packings and insure
longestservice life.

TROUBLE SHOOTING

Pumpproblems can occur in either the Air Motor Section or the Lower
PumpEnd Section, use these basic guidelines to help determine which
sectionis affected.
Ifthe pump will not cycle.
xBecertain to first check for non-pump problems including kinked, re-
strictiveor plugged inlet / outlet hose or dispensing device. Depres-
surizethe pump system and clean out any obstructions in the inlet /
outletmaterial lines.
xReferto the motor manual for trouble shooting if the pump does not
cycleand / or air leaks from the air motor.
Ifthe pump cycles but does not deliver material.
xReferto the lower pump end manual for further trouble shooting.

PUMP CONNECTION --UPPER / LOWER

NOTE:All threads are right hand.
1. Lay the pump assembly on a workbench.
2. Remove the three nuts from the three spacer rods. (Fig. 1)
3. Pullthe air motor from the lower pump end until motor piston rod is in
the“down” position and lower pump end rod is in “up” position.
4. Usinge-ring pliers, slide the retaining ring up far enough to allow the
sleeveto move upward and release the two connectors. (Fig. 2)
LowerPump
Piston Rod
Pump Motor
Piston Rod RETAININGRING
90102
SLEEVE
90109
CONNECTOR
90096 (2)
PUMPCONNECTOR DETAIL
FIGURE2
REASSEMBLY
1. Align the pump motor with the lower pump end.
2. Installthe two connectors and retain with the sleeve, slide the retain-
ingring back into position.
3. Reinstall the spacer rods to the pump motor.
4. Bring the motor and lower pump together and retain with the three
nuts.
PN97999-653