650941- X- B
PUMP OPTION DESCRIPTION CHART
650941--X
PACKING MATERIAL
PLUNGER TYPE
SPRING ARRANGEMENT
PACKING MATERIAL
(PACKINGS ARE UPPER AND LOWER UNLESS NOTED)
C
UHMW--PE
P
UHMW--PE/PTFE STAG’D (UPPER)
F
UHMW--PE/LEATHER STAG’D (UPPER)
UHMW--PE (LOWER)
UHMW--PE (LOWER)
R
PTFE/UHMW--PE STAG’D (UPPER)
J
POLYURETHANE (UPPER)
PTFE (LOWER)
UHMW--PE (LOWER)
3
GLASS FILLED PTFE
SPRING ARRANGEMENT
3
NO SPRING
4
MULTIPLE WAVE SPRING
PLUNGER TYPE
4
CS HD CHROME PLATING
X 4 --B
GENERAL DESCRIPTION
WARNING
HAZARDOUS PRESSURE. Do not exceed maxi-
mum operating pressure of 2668 psi (184 bar) at 2000 psi (138
bar) inlet hydraulic pressure.
PUMP RATIO X
MAXIMUM PUMP
INLET PRESSURE TO PUMP MOTOR
=
FLUID PRESSURE
Pump ratio is an expression of the relationship between the pump motor area and the
lower pump end area. EXAMPLE: When 150 p.s.i. (10.3 bar) inlet pressure is supplied
to the motor of a 5:1 ratio pump it will develop a maximum of 750 p.s.i. (52 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 Hydraulic 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,
restrictiveorpluggedinlet/outlethoseordispensingdevice.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 hydraulic fluid leaks from the hydraulic motor.
If the pump cycles but does not deliver material.
•
Refer to 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 top three screws and washers from the three spacer
rods (see figure 1).
3. Pull the hydraulic motor from the lower pump end until motor piston
rod is in the ‘‘down” position and lower pump end rod is in ‘‘up” posi-
tion.
4. Remove the three spacer rods by unscrewing the bottom three cap
screws and washers.
5. Remove the cotter pin and unscrew the lower pump end rod fromthe
adapter (see figure 2).
Pump Motor
Piston Rod
Cotter Pin
Y15--46--C
Adapter
93350--2
PUMP CONNECTOR DETAIL
FIGURE 2
REASSEMBLY
1. Align the pump motor with the lower pump end.
2. Screw the adapter onto the motor piston rod and secure with set
screw.
3. Screwthelowerpumprodintotheadapterandsecurewiththecotter
pin. NOTE: Bend the ends of the pin into the groove of adapter.
4. Reinstall the spacer rods to the lower pump end, securing with three
washers and cap screws.
5. Bring the motor and lower pump together and retain with the three
screws and washers.
PN 97999- 494
