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PACKING MATERIAL
GENERAL DESCRIPTION
WARNING HAZARDOUS PRESSURE. Do not exceed maxi-
mum operating pressure of 5964 p.s.i. (411.3 bar) at 120 p.s.i.
(8.3 bar) inlet air pressure.
PUMP RATIO X
INLET PRESSURE TO PUMP MOTOR
Pump ratio is an expression of the relationship between the pump motor area and the
lower pump end area. EXAMPLE: When 120 p.s.i. (8.3 bar) inlet pressure is supplied to
the motor of a 4:1 ratio pump it will develop a maximum of 480 p.s.i. (33.1 bar) fluid pres-
sure (at no flow) -- as the fluid control is opened, the flow rate will increase as the motor
cycle rate increases to keep up with the demand.
WARNING Refer to general information sheet for additional
safety precautions and important information.
•
The Chop - Check pumps are primarily designed for the pumping of
heavy viscous material with or without fibrous content. The models
can be used with a gravity feed single post lift as a topper type as-
sembly or with a two post lift as a force feed type assembly. The low-
er pump is designed for easy priming and 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 motor is connected to the lower pump end by a spacer section.
This allows for lubrication of the upper packing gland and prevents
motor contamination because of normal wear and eventual leakage
through the material packing gland. Be sure the solvent cup is ade-
quately filled with lubricant to protect the upper packings and insure
longest service life.
TROUBLE SHOOTING
Pump problems can occur in either the Air Motor Section or the Lower
Pump End Section. Use these basic guidelines to help determine which
section is affected.
If the pump will not cycle.
•
Be certain to first check for non-pump problems including kinked, re-
strictive or plugged inlet / outlet hose or dispensing device. Depres-
surize the pump system and clean out any obstructions in the inlet /
outlet material lines.
•
Refer to the motor manual for trouble shooting if the pump does not
cycle and / or air leaks from the air motor.
If the pump cycles but does not deliver material.
•
Refer to the lower pump end manual for further trouble shooting.
PUMP OPTION DESCRIPTION CHART
4 7 -B
PLUNGER TYPE
SPRING ARRANGEMENT
=
MAXIMUM PUMP
FLUID PRESSURE
PACKING MATERIAL
(PACKINGS ARE UPPER AND LOWER UNLESS NOTED)
3 Glass Filled PTFE
C UHMW-PE
G UHMW-PE / Leather Staggered
SPRING ARRANGEMENT
4 Multiple Wave Spring
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 (figure 1).
3. Pull the 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. Remove the cotter pins and unthread piston rods from the connector
(figure 2).
PUMP CONNECTOR DETAIL
Pump Motor
Piston Rod
FIGURE 2
Lower Pump
Piston Rod
1. Thread the connector to the pump motor piston rod until the hole thru
the connector is aligned with the hole thru the piston rod.
2. Assemble the cotter pin thru the hole and bend the ends of the pin
into the groove of the connector.
3. Thread the connector to the lower pump piston rod until the hole thru
the connector is aligned with the hole thru the piston rod.
4. Assemble the cotter pin thru the hole and bend the ends of the pin
into the groove of the connector.
5. Note: Heads and ends of cotter pins must not extend more than
.125" beyond o.d. of connector.
6. Reinstall the spacer rods to the pump motor.
7. Bring the motor and lower pump together and retain with the three
nuts.
P UHMW-PE / PTFE Stag'd (Upper)
UHMW-PE (Lower)
R PTFE / UHMW-PE Stag'd (Upper)
Glass Filled PTFE (Lower)
PLUNGER TYPE
7 HD SS W / HD Chrome Plating
CONNECTOR
92226
COTTER PIN
Y15-46-C (2)
REASSEMBLY
PN 97999-834
650891-X-B