AF0409AX3XXXX-XX-X (en)
Page 3 of 8
OPERATING AND SAFETY PRECAUTIONS
Figure 2
DIMENSIONS
CLMaterial outlet
CLMaterial outlet
Air Inlet (Female)
1/2 - 14 NPTF -1
BOTTOM VIEW
TOP VIEW
6°
18°
81°
61°
81°
99°
99°
3/8 - 16 UNC-2B
(4 places)
Ø 5.312 BC
(4 places)
Apply Loctite 242 to threads of piston rod before assembly.
NOTE:
Tighten nut to 60 - 70 ft lbs (81.3 - 94.9 Nm). NOTE: refer
to figure 3, page 4.
For AF0409A43XXXX and AF0409A45XXXX: Install the two con-
nectors and retain with the sleeve, slide the retaining ring back
into position. NOTE: Refer to figure 3, page 4.
Screw the lower pump assembly to the air motor. NOTE: tighten
tube to 90 - 100 ft lbs (122 - 135.6 Nm).
LOWER PUMP END DISASSEMBLY
NOTE:
All threads are right hand.
While holding pump securely with a strap wrench, unthread
and remove tube.
Loosen nut against motor rod and unthread piston rod from
motor rod.
Unthread and remove inner check seat, releasing washer, cup
and ball.
Loosen nut to unthread and remove cup follower from piston
rod.
While holding tube securely, unthread and remove foot valve
seat and components.
Remove ball stop pin, releasing ball.
LOWER PUMP END ASSEMBLY
NOTE: Thoroughly clean and lubricate all seals. Replace all soft
parts with new ones included in the repair kit.
Assemble “O” ring, ball and ball stop pin to foot valve seat.
Assemble foot valve seat and components to tube. NOTE:
Tighten foot valve seat to 125 - 150 ft lbs (169.5 - 203.4 Nm).
Assemble piston rod and nut to cup follower.
NOTE:
Apply
Loctite 242 to threads of piston rod before assembly. NOTE:
Tighten nut to 50 - 60 ft lbs (67.8 - 81.3 Nm).
Assemble cup, washer and ball to cup follower, securing with
inner check seat. NOTE: Tighten (8) inner check seat to 65 - 70 ft
lbs (88.1 - 94.9 Nm).
Assemble nut and piston rod.
NOTE:
Apply Loctite 242 to
threads of piston rod before assembly.
NOTE:
Tighten nut to 60
- 70 ft lbs (81.3 - 94.9 Nm).
Assemble “O” ring to tube and assemble tube over cup follower
and components and into air motor base.
NOTE:
Tighten tube
to 90 - 100 ft lbs (122.0 - 135.6 Nm).
1.
2.
3.
1.
2.
3.
4.
5.
6.
1.
2.
3.
4.
5.
6.
WARNING
HAZARDOUS PRESSURE. Do not exceed maxi-
mum operating pressure of 1350 psig (93.1 bar) at 150 psig
(10.3 bar) inlet air 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 psig (10.3 bar) inlet pressure
is supplied to the motor of a 4:1 ratio pump, it will develop a maximum of 600
psig (41.4 bar) fluid pressure (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 two-ball pumps are primarily designed for the pumping of
medium viscosity fluids. The two-ball design provides better
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.
NOTICE:
Thermal expansion can occur when the fluid in the mate-
rial lines is exposed to elevated temperatures. Example: Material
lines located in a non-insulated roof area can warm due to sunlight.
Install a pressure relief valve in the pumping system.
Replacement warning label (pn 92325) is available upon re-
quest.
PUMP CONNECTION - UPPER / LOWER
NOTE: All threads are right hand.
Unscrew the lower pump assembly from the air motor.
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.
For AF0409A43XXXX and AF0409A45XXXX: Using e-ring pliers,
slide the retaining ring up far enough to allow the sleeve to
move upward and release the two connectors.
NOTE:
Refer to
figure 3, page 4.
Remove (3) seal (2) spacer, (5) spring and (6) washer from cavity
in bottom of motor.
REASSEMBLY
Assemble (3) seal, (2) spacer, (5) spring and (6) washer into
cavity in bottom of motor.
NOTE:
Refer to figure 3, page 4 for
packing lip direction.
Align the pump motor with the lower pump end.
For AF0409A13XXXX: Assemble nut and piston rod and compo-
nents to motor rod, tightening nut against motor rod. NOTE:
1.
2.
3.
4.
1.
2.
3.
