ARO 670077 Manual del usuario - Página 8

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Product discharged from air exhaust.
y
Check for diaphragm rupture.
y
Check tightness of (6) diaphragm nut.
Air bubbles in product discharge.
y
Check connections of suction plumbing.
y
Check "O" rings between intake manifold and fluid caps.
y
Check tightness of (6) diaphragm nut.
Pump blows air out main exhaust when stalled on either
stroke.
y
Check "U" cups on (111) spool in major valve.
y
Check (141) valve plate and (140) insert for wear.
y
Check (169) "U" cup on (167) pilot piston.
Dimensions shown are for reference only, they are displayed in inches and millimeters (mm).
E
F
H
J
A - 8-15/32" (214.5 mm)
B - 10-1/16" (255.3 mm)
C - 6-5/32" (155.8 mm)
D - 2" (50.9 mm)
Page 8 of 8

TROUBLESHOOTING

DIMENSIONAL DATA

L (outlet)
G
M
L (inlet)
E - 6-23/32" (170.6 mm)
F - 6" (152.4 mm)
G - 11-5/16" (287.0 mm)
H - 4-13/16" (122.2 mm)
Low output volume.
y
Check air supply.
y
Check for plugged outlet hose.
y
For the pump to prime itself, it must be mounted in the
vertical position so that the balls will check by gravity.
y
Check for pump cavitation - suction pipe should be sized
at least as large as the inlet thread diameter of the pump
for proper flow if high viscosity fluids are being pumped.
Suction hose must be non-collapsible type, capable of
pulling a high vacuum.
y
Check all joints on the intake manifolds and suction
connections. These must be air tight.
y
Inspect the pump for solid objects lodged in the
diaphragm chamber or the seat area.
Air Inlet 1/4 - 18 NPTF SAE Short
B
N
D
K
DIMENSIONS
J - 5-1/2" (139.7 mm)
K - 5/16" (8.0 mm)
L - 1/2 - 14 NPTF - 1
M - 3/8" (9.5 mm)
Figure 5
C
A
N - 6-1/32" (153.0 mm)
PN 97999-1336
670077 (en)