650632-X- C

PUMP OPTION DESCRIPTION CHART

650632--X
PACKINGMATERIAL
PLUNGERTYPE
SPRINGARRANGEMENT
PACKINGMATERIAL (PACKINGSARE UPPER AND LOWER UNLESS NOTED)
7GLASSFILLED PTFE (UPPER) PUHMW--PE/PTFESTAG’D(UPPER)
VIRGINPTFE (LOWER)UHMW--PE (LOWER)
CUHMW--PE RPTFE/UHMW--PESTAG’D(UPPER)
FUHMW--PE/LEATHERSTAG’D(UPPER) PTFE(LOWER)
UHMW--PE(LOWER)
SPRINGARRANGEMENT
4MULTIPLEWAVESPRING
PLUNGERTYPE
3HDSS W/HD CHROME PLATING
43--C

GENERAL DESCRIPTION

WARNING HAZARDOUSPRESSURE. Do not exceed maxi-
mumoperating pressure of 600 psi (41.4 b ar) at 150 psi (10.3
bar)inlet air pressure.
PUMPRATIO X MAXIMUMPUMP
INLETPRESSURE TO PUMP MOTOR =FLUIDPRESSURE
Pumpratio is an expression of the relationship between the pump motorarea and the
lowerpump end area. EXAMPLE: When 150 p.s.i. (10.3 bar) inlet pressure is supplied
tothe motor of a 4:1 ratio pump it will develop a maximumof 600 p.s.i. (41.4 bar) fluid
pressure(at no flow) --as the fluid control is opened, the flow rate will increase as the
motorcycle rate increases to keep up with the demand.
WARNING Referto general information sheet for additional
safetyprecautions and important information.
•The Four--Ballpumps are primarily designed for the high volume
transferof light and medium viscosity fluids compatible with carbon
steel.The lower pump is designed for easy priming and the double
actingfeature is standard on all ARO industrial pumps. Material is
delivered to the pump discharge outlet on both the up and down
stroke.
•Themotor 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.
•Becertain to first check for non--pumpproblems including kinked,
restrictiveorplugged inlet/outlet hose or dispensing device. Depres-
surizethe pump system and clean out any obstructions in the inlet/
outletmaterial lines.
•Referto 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.
•Referto the lower pump end manual for further trouble shooting.

PUMP CONNECTION --UPPER / LOWER

NOTE:All threads are right hand.
1. Laythe pump assembly on a workbench.
2. Removethe three nuts and washers from the three spacer rods (see
figure1).
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--ringpliers, slide the retaining ring up far enough to allow the
sleeveto move upward and release the two connectors (see figure
2).
LowerPump
Piston Rod
Pump Motor
Piston Rod RETAININGRING
90102
SLEEVE 90109
CONNECTOR
90096 (2)
PUMPCONNECTOR DETAIL
FIGURE2
REASSEMBLY
1. Alignthe pump motor with the lower pump end. Position the air inlet
ofthe motor 200_from the material outlet.
2. Installthe two connectors and retain with the sleeve, slide theretain -
ingring back into position.
3. Reinstallthe spacer rods to the pump motor.
4. Bringthe motor and lower pump together and retain with the three
nutsand washers.
PN97999 - 684